Average Flame Propagation Velocity Research Articles

Effect of dimensionless vent ratio on the flame-shock wave evolution dynamics of blended LPG/DME gas explosion venting

To reveal the flow field-shock wave-flame coupling evolution law of LPG/DME blended gas explosion venting under different dimensionless vent ratio(KV), the numerical model for multi-blended gas explosion venting was established and research of blended gas explosion venting at KV = 0.02–0.21 was carried out based on experimental verification. The results show that, after the vent opens, the turbulence intensity increases, the velocity gradient of the flow field increases, the maximum explosion wind velocity(Vmax) of the outfield varies linearly with KV, and the flame of “mushroom shape” is elongated, and “break flame” occurs under the action of the relative motion of “primary and secondary vortex group”. When KV＞0.02, the flame propagation velocity increases locally because of the thermal-mass diffusion instability, and with increasing KV, the average flame propagation velocity decreases from 258.29 m/s to 226.58 m/s. In the process of explosion venting, a typical shock wave fluctuating pressure waveform curve is formed in the outfield. Under the combined action of the infield pressure venting effect and the outfield turbulence intensity, the maximum explosion overpressure in the outfield (Pmax) reaches maximum 423.97 kPa at KV = 0.07. Meanwhile, the larger the KV, the greater the shock wave velocity due to the lead role of the infield explosion venting shock wave and outfield flame compression shock wave on the shock wave propagation velocity.

A comparative investigation of the explosion mechanism of metal hydride AlH3 dust and Al/H2 mixture

Aluminum hydride (AlH3) is an excellent hydrogen storage material, whereas hydrogen is easily released because of the low-temperature dehydrogenation characteristic. Therefore, the explosion mechanism of AlH3 dust is explored by comparison with the Al/H2 mixture. The findings indicate that since the residual aluminum after hydrogen evolution combusts more completely, AlH3 has a higher explosion pressure value than Al/H2 mixture. However, the explosion pressure rise rate and average flame propagation velocity of AlH3 dust are lower than those of Al/H2 mixture. It is attributed to the initial free hydrogen state and initial higher hydrogen concentration of Al/H2 mixture. The key radicals that generate main explosion residues Al2O3 are AlO and O. AlH3(+M) ≤> AlH + H2(+M) has the greatest sensitivity on the formation of O and AlO. Hydrogen combustion expedites the phase transition process of aluminum dust, while their competition for oxygen is not conducive to the formation of Al2O3.

Experimental and reaction kinetics studies on deflagration characteristics of liquefied petroleum gas-air mixture with different compositions in confined space

To assess the hazardous impact of liquefied petroleum gas (LPG), this study investigated its macro–micro deflagration characteristics under various compositions and equivalence ratios using a 20 L spherical experimental apparatus and CHEMKIN-Pro kinetic software. The findings are as follows: when the equivalence ratio was 1.2, the LPG exhibited peak values for the maximum explosion pressure (pmax), maximum explosion pressure rise rate ((dp/dt)max), deflagration index (KG), and average flame propagation velocity (v). Furthermore, the (dp/dt)max, KG, and v increased with increasing the proportion of C3H8. In the LPG chain reaction, the most influential steps in terms of promotion and inhibition were R1: H + O2 = O + OH and R104: 2CH3(+M) = C2H6(+M), respectively. C2H4 gradually accumulated during the chain initiation phase and rapidly depleted as the temperature sharply increased. Hence, to effectively inhibit LPG explosion, it is recommended to develop inhibitors capable of eliminating reactive radicals (such as H*, O*, and OH*) and targeted inhibitors that specifically inhibit the reaction involving C2H4. Additionally, augmenting the C3H8 proportion in LPG can mitigate the emission of toxic and harmful gases, such as CO and CO2. This study has significant theoretical and practical implications for the safe, environmentally friendly, and efficient use of LPG.

Experimental study on aerosol explosion characteristics and flame propagation behavior of aluminum/ethanol nanofluid fuel

Aluminum/ethanol nanofluid fuel, which exhibits superior emission and combustion properties as well as broad application prospects, is a novel clean fuel produced by dispersing aluminum nanoparticles into liquid ethanol. However, the aerosol explosion characteristics of the fuel are not clear at present. In this study, a visible closed aerosol explosion device was set up to perform the explosion experiment, aiming to investigate the explosion characteristics and flame propagation behavior of the fuel under different blending ratios (0 wt%-10 wt%) and aerosol concentrations (97.53 g/m3-214.81 g/m3). The results showed that, as the blending ratio increased, the maximum explosion pressure Pex, the maximum rate of pressure rise (dP/dt)ex, the explosion index Ka, the maximum flame propagation velocity Vmax, and the average flame propagation velocity V¯ all increased first, reaching their peak values at the critical blending ratio (4 wt%), and subsequently decreased. Similarly, for nanofluid fuel of different blending ratios, the explosion time te was first shortened and then extended, with the minimum value also occurring at 4 wt%. Moreover, an analysis of fuels’ evaporation properties was performed using TGA analysis. The morphologies and compositions of the explosion products were analyzed by SEM, EDS, and FTIR analysis. Based on the above analyses, a reaction mechanism model for the nanofluid fuel was established. This model reveals the influence mechanism of the blending ratio on aerosol explosions, explains the corresponding explosion behavior, and provides a reference for the research and development of nanofluid fuel.

Numerical study of the firing, radicals and intermediates in the combustion process of a H2-assisted combustion DISI methanol engine

The firing, radicals and intermediates in the combustion process of a port-injection hydrogen (H2)-assisted combustion direct-injection spark-ignition (DISI) methanol engine were numerically simulated. The engine with port-injection H2 plus direct-injection methanol was tested at 1800 rpm with intake manifold absolute pressure of 68 kPa. AVL-Fire coupling the detailed methanol chemical kinetics modeling with 21 components and 84 elementary reactions was used to simulate in this study. The model calculation results agreed well with the experiments, and the average error is less than 3% and can guarantee other outcomes. The simulation results show that high added H2 ratio (RH2) has higher turbulent kinetic energy in the region closer to the combustion chamber wall. When RH2 is greater than 6%, the formation time of fire core is obviously shortened and the average flame propagation velocity is significantly increased. Increasing RH2, the generation speed and the peak value of H, O and OH radicals increase, and higher concentration of radicals accelerates the diffusion of combustion from the hot flame zone. OH radical is a key reactant, which always plays a decisive role in the process of methanol oxidation. Effect of added H2 on methanol oxidation reaction is reflected in accelerating the initial stage of combustion and ameliorating the intensity of reaction. The mass fractions of HCHO, HCO and CO, as the main intermediate products, all show a trend of increasing first and then decreasing with the crank angle (CA), and their peak values indicate the phase of the most violent reaction. The peak values of HCHO and HCO are all near the top dead center (TDC), which is consistent with the trend of H and OH radicals generation rate. The relationship between consumption rate of methanol and CA shows that the consumption rate of methanol at RH2 = 9% is the earliest and steepest, and most of methanol has been consumed by reaction before TDC. Added H2 accelerates the fire propagation, H2 dominates the process of radical formation and methanol chain reaction, the flame spread period is shortened rapidly, and the effect of added H2 to promote combustion is obvious.

Experimental Study of the Suppression Effect of N2/CO2 On the LPG Explosion Behavior in a Half-Open Duct with Large Aspect Ratios

ABSTRACT This work aims to investigate the effect of N2/CO2 on the explosion behavior of premixed liquefied petroleum gas (LPG)-air in a half-open duct. Experiments were performed in a duct (L/D = 47.5) with the ignition end closed and the other end open. Firstly, the optimal explosion concentration of LPG was determined using the stepwise approximation method, secondly, the effects of different volume fractions (VFs) of N2/CO2 on the pressure dynamic process, flame propagation velocity, and explosion severity of LPG-air explosion were analyzed, and finally the inerting effects of N2 and CO2 were compared using the control variable method. The results show that the explosion pressure and flame propagation velocity reach a maximum when the VF of LPG is 4.8% (without inert gas), and two pressure peaks (the first pressure peak (P 1 ) and the second pressure peak (P 2 )) are observed. When the VF of LPG is 4.8%, the maximum pressure and the average flame propagation velocity in the tube decrease and the explosion intensity inside and outside the duct was effectively mitigated as the VF of N2/CO2 increases, and the explosion is completely suppressed as the VF of inert gas reached 30%. P 2 is significantly suppressed, and the maximum explosion pressure (P max ) occurs at when the VF of N2/CO2 is above 15%. The suppression effects of CO2 are more remarkable at a lower VF (below 18%), those of N2 are more significant at a higher VF (above 18%), and P 1 also follows this rule. For a given volume fraction of inert gas, the suppression effect of N2/CO2 on the degree of explosion severity becomes more significant when approaching the optimal LPG explosion concentration (4.8%).

Preparation and characterization of flower-like Mg-Al hydrotalcite powder for suppressing methane explosion

A novel flower-like Mg-Al hydrotalcite powder was successfully prepared using coprecipitation method and then characterized for suppressing methane explosion. The influences of Mg-Al hydrotalcite on the explosion pressure and flame propagation characteristics of methane were studied using a 5 L pipeline explosion experimental setup, and its explosion suppression performance was compared with that of magnesium hydroxide and aluminum hydroxide. The results show that the novel Mg-Al hydrotalcite powder prepared in this study has an excellent methane explosion suppression performance. The maximum explosion pressure of methane after adding 0.2 g/L Mg-Al hydrotalcite powder was decreased by 77.72%, and the average flame propagation velocity of methane explosion was decreased by 66.34%. With an increase of the Mg-Al hydrotalcite powder concentration, the main methane flame structure became progressively discrete. Combined with the physical and chemical properties of Mg-Al hydrotalcite powder, its explosion suppression mechanism on 9.5% methane was discussed.

Flame Propagation Characteristics of Hybrid Explosion of Ethylene and Polyethylene Mixture under Pressure Accumulation

In order to study the flame propagation characteristics of a ethylene/polyethylene hybrid explosion under pressure accumulation, a visual pressure-bearing gas/power hybrid-explosion experimental platform was built. The flame propagation characteristics of polyethylene and ethylene/polyethylene hybrid explosions in the closed vessel were analyzed. The results show that the flame brightness, flame front continuity and average flame propagation velocity of polyethylene dust explosion in the closed vessel increased first and then decreased when the polyethylene dust concentration increased. The curve of the flame propagation velocity with time had obvious pulsation characteristics. Adding 1% and 3% ethylene to different concentrations of polyethylene dust significantly improved its explosion flame brightness, flame front continuity and average flame propagation velocity. Moreover, it also improved the fluctuation amplitude of the explosion flame propagation velocity with time curve. The explosion flame of the polyethylene dust and ethylene/polyethylene hybrid mixture included four zones during the propagation process, which were denoted as the unburned zone, preheated zone, premixed flame zone and dust flame zone. The addition of ethylene to polyethylene dust can significantly increase its thickness of premixed flame zone and preheated zone, and the thickness increased when the ethylene concentration increased.

Experimental study and mechanism analysis on the suppression of flour explosion by NaCl and NaHCO3

ABSTRACT The suppression effect of adding different proportions of NaCl and NaHCO3 powder on flour explosion was studied by using Hartmann experimental device and 20 L spherical explosive device. The results showed that with the increase of NaCl and NaHCO3 concentrations, the flame speed and propagation distance decreased gradually. The maximum explosion pressure Pmax and the maximum pressure rise rate (dP/dt)max decreased significantly. When 80% NaCl and NaHCO3 were added, the average flame propagation velocity reduced to 2.73 m/s and 0.56 m/s, respectively, and the maximum explosion pressure less than 0.15MPa, the flour explosion could be inhibited by NaCl and NaHCO3. NaHCO3 was more effective than NaCl in inhibiting flame propagation and explosion overpressure. Finally, combined with the pyrolysis characteristics of NaCl and NaHCO3, the mechanism of inhibitors inhibiting the explosion of flour was further studied. The endothermic decomposition of NaHCO3 produced inert gas, diluted oxygen concentration, captured active free radicals, and terminated the combustion chain reaction. NaCl inhibits the explosion of flour by absorbing heat and coating it.

Flame propagation behaviours and overpressure characteristics of LDPE dust / ethylene hybrid mixture explosions

ABSTRACT It studied the explosion propagation of the hybrid mixture of LDPE dust and a small amount of ethylene (below its LEL) in a closed duct, to examine the impacts of dust concentration, dust particle size, and ethylene concentration on flame propagation behavior and overpressure characteristics. The dust concentration affected the explosion behavior of the LDPE dust/ethylene hybrid mixture in two ways. The flame gradually became discrete and unstable as the dust concentration increased, while the maximum and average flame propagation velocity, Pmax, and (dp/dt)max increased first and then decreased. The dust particle size and ethylene concentration had a significant effect on the hybrid mixture explosion. As the particle size decreased or the ethylene concentration increased, the discrete flames quickly merged into a bright continuous flame. Further, the maximum and average flame propagation velocity, Pmax, and (dp/dt)max increased, whereas the fluctuation degree of the flame propagation velocity with time showed a decreasing trend. There was no obvious agglomeration phenomenon among small LDPE particles. The explosion overpressure and flame propagation showed a strong synergistic effect. Compared with the semi-open duct, the closed duct with a more uniform dust/gas hybrid mixture showed a more continuous flame structure, a shorter flame propagation distance, and a lower flame propagation velocity. These conclusions can provide a scientific basis for explosion risk analyses and process safety designs involving the production of LDPE powder.

A novel reactive P-containing composite with an ordered porous structure for suppressing nano-Al dust explosions

A novel chemical suppressant ([email protected]2-MCM41) was synthesized via self-assembly. NH2-MCM-41 was prepared using diatomaceous earth (DE) as the silica source. FTIR spectra showed that phytic acid (PA) was successfully grafted onto synthesized NH2-MCM-41 via hydrogen bonding. The highly ordered mesoporous structure of [email protected]2-MCM41 was observed from TEM and small angle X-ray diffraction (SAXRD). The effectiveness of [email protected]2-MCM41 in the suppression of nano-Al dust explosions was investigated. Experimental results suggested that the addition of [email protected]2-MCM41 could effectively reduce the average flame propagation velocity (Vavg) and maximum explosion pressure (Pmax). After the addition of 16.7 wt% [email protected]2-MCM41, the Vavg of the gas-phase flame was reduced by 75%. With addition of 28.6 wt% [email protected]2-MCM41, the Pmax of nano-Al dust decreased by 65.7%. As the mass fraction of [email protected]2-MCM41was increased to 33.3%, nano-Al dust explosion was completely suppressed. The SEM, FTIR and EDS results showed that a complex sealing film was formed on the surface of the explosion products, which occupied the open sites on the Al surface and thereby interrupted the Al evaporation and surface reaction. Subsequently, the suppression mechanism by which phosphorus containing suppressants consume free radicals and the interaction of PA molecules with the aluminum particle surface were revealed in depth.

A 2D CFD model investigation of the impact of obstacles and turbulence model on methane flame propagation

The formation of explosive gas zones (EGZs) from flammable vapors, gases, or dust pose safety hazards to many industries. In many cases, explosions may occur in confined areas with obstacles in the path of flame expansion. By studying the effects of obstacle shape, turbulence model, and spark location on flame propagation and turbulence, a more complete understanding of the flame and fluid dynamics interaction has been achieved. Reynolds Averaged Navier-Stokes (RANS) models were tested to determine if these simplified turbulence models could capture the flame dynamics and propagation velocities using fewer computational resources compared to the higher fidelity Large Eddy Simulation (LES) turbulence model. Results showed that square obstacles caused faster flame propagation compared to hexagons and circles. The square had an average flame propagation velocity 26 % faster than the circle, and the hexagon was 16 % faster than the circle using a k-ω model. Modeling results indicate variation of spark location by as small as 10 % of the obstacle diameter can result in a difference of the flame propagation. Findings on turbulence model accuracy and computational time along with shape comparison can be applied in future modeling of large systems, providing crucial information for safety planning and explosion prevention.

Flame propagation and pressure characteristics of polymethyl methacrylate dust explosions in a horizontal pipe

To reveal the characteristics of flame propagation and pressure in organic dust explosions during pneumatic transportation, 30 μm polymethyl methacrylate (PMMA) dust explosions with different airflow velocities were experimentally conducted in a horizontal pipe. The results showed that dust flame transited from the luminous flame with a continuous structure to discrete flames as flame propagating. After the appearance of the discrete flames, flame propagation velocity increased sharply owing to the positive feedback coupling between combustion and expansion. With the increase of dust concentration, the average flame propagation velocity, maximum flame temperature, temperature rising rate, maximum pressure, and maximum rate of pressure rise increased and then decreased. These explosion characteristics (except for the maximum flame temperature) increased significantly with the increase of airflow velocity. When airflow velocity increased from 6.39 m/s to 13.3 m/s, the peaks of average flame propagation velocity increased from 23.9 m/s to 38.2 m/s; the peaks of maximum pressure and maximum rate of pressure rise were increased by 1.9 and 6.1 times respectively. In addition, it was found that the optimum dust concentration decreased as airflow velocity increased. Furthermore, the relationship among flame propagation, temperature, and pressure was discussed in detail.

Flame propagation characteristics and explosion behaviors of aluminum dust explosions in a horizontal pipeline

The effects of airflow velocities, particle sizes, and dust concentrations on the flame propagation characteristics and explosion behaviors of aluminum dust explosions in a horizontal pipeline were experimentally investigated. The results showed that the distributions of the airflow velocity and turbulence integral length both exhibited convex parabolic distributions. After ignition, the flame propagation velocities of 5μm and 30μm aluminum dust explosions both experienced acceleration processes. The positive feedback coupling among the combustion, expansion, and turbulence governed the acceleration mechanism. The flame propagation characteristics and explosion behaviors were significantly affected by the airflow velocity. As the airflow velocity increased from 6.4m/s to 13.3m/s, the maximum average flame propagation velocity increased from 60m/s to 140m/s. Moreover, the maximum explosion pressure increased from 36kPa to 83kPa, and the maximum explosion impulse increased from 78Pa.s to 576Pa.s.

Hydrogen cloud explosion evaluation under inert gas atmosphere

This paper is aimed at evaluating the hydrogen cloud explosion under inert gas atmosphere experimentally and numerically. The results demonstrate that only under Ar, N2 and CO2 atmosphere, the lean and stoichiometric hydrogen flame tends to be unstable. The Markstein length of Ar, N2 and CO2 is less than zero and the decreasing order is Ar, N2 and CO2. Except for CO2, the average flame propagation velocity, maximum explosion pressure, maximum pressure rise rate, positive pressure impulse and explosion pressure attenuation decrease monotonously in the order of He, Ar and N2. For various equivalence ratios and inert gases, the explosion pressure releases into the far field at the sound speed and attenuates with distance. Due to the fact that the explosion pressure is closely related to laminar burning velocity, the explosion pressure suppression by inert gas is revealed by analyzing the factors affecting laminar burning velocity. As equivalence ratio increases, the adiabatic flame temperature plays a more important role in affecting laminar burning velocity than thermal diffusivity. For different inert gases, the effect of thermal diffusivity on laminar burning velocity is obviously greater than adiabatic flame temperature. Besides, the third-body effect of various inert gases increases gradually until Φ = 1.4. and then decreases with increasing equivalence ratio. For a given equivalence ratio, the increasing order of third-body effect is He, Ar and CO2.

Combustion behaviors and temperature characteristics in pulverized biomass dust explosions

Abstract Flame propagation behaviors and temperature characteristics of four types of biomass with two different particle size distributions were studied experimentally. Results show that the flame front of a 50–70 μm biomass is nearly spherical and smooth, the flame zone is characterized by yellow or dark red spotted flames, and luminous flames are present behind it. The flame morphology of 100–200 μm biomass dust is irregular and discrete. The average flame propagation velocity and the amplitude of the velocity fluctuation are functions of the mass density of the biomass particles and depend on the particle size distributions. The flame-speed oscillation of biomass particles is caused by the velocity slip between the volatile gases and particles. Flame temperatures of 50–70 μm and 100–200 μm biomass dust reach the maximum value at 1000 g/m3, and show a slight dependence on the particle size distribution. An analysis of the Knudsen number indicates that the combustion characteristics of biomass particles with particle size distributions within the range studied are characterized by a continuum regime. It is indicated that 100–200 μm poplar sawdust will be the “best” option as a biomass replacement feedstock for coal powered plants.

Flame propagation behaviors and temperature characteristics in polyethylene dust explosions

To reveal the flame propagation mechanism in polyethylene (PE) dust explosions, the flame propagation behaviors and temperature characteristics of polyethylene dust clouds were experimentally studied in an open duct. Flame propagations in polyethylene dust clouds with different concentrations and particle size distributions were recorded using high-speed photography. The flame temperatures were measured using two fine thermocouples comprising Pt–Pt/Rh13% wires of diameter 25 μm. Because of severe agglomeration, the minimum explosible concentration of polyethylene particles with diameter < 75 μm was higher than that of the particles with diameter 75–100 μm. It was observed that the flame front gradually became continuous as the particle size increased with the same polyethylene dust concentration of 300 g/m3. With higher polyethylene dust concentration, the flame front of the polyethylene particles of size <75 μm could quickly become discrete, and the floating flame appeared early, while the flame front of the 100–212 μm polyethylene particles transformed from a continuous flame into several independent diffusion flames. It was demonstrated that the flame propagation velocities were not constant, and that they fluctuated owing to the turbulence and expansion of the combustion products. The average flame propagation velocity increased initially, and then decreased with increasing dust concentration. The peak velocity of the polyethylene particles of size <75 μm was 4.79 m/s at a mass density of 300 g/m3, while the peak velocity of the 75–100 μm particles was 4.55 m/s at a mass density of 400 g/m3, and that of the 100–212 μm particles was 2.67 m/s at a mass density of 500 g/m3. In addition, it was found that the maximum flame temperatures of the different polyethylene particles were approximately the same; the temperatures were 1585.4 °C, 1511.8 °C, and 1508.4 °C for the polyethylene particles of sizes of 100–200 μm, <75 μm, and 75–100 μm, respectively. This phenomenon may be caused by the combustion behavior of the molten polyethylene particles. When the dust concentration is increased within the optimum concentration, flame temperature increased with the increase in flame propagation velocity. The flame temperature of the polyethylene particles of size <75 μm decreased as the flame propagation velocity decreased, while the flame temperature of the 75–100 μm polyethylene particles did not change significantly.

Modelling the average velocity of propagation of the flame front in a gasoline engine with hydrogen additives

The paper presents models for calculating the average velocity of propagation of the flame front, obtained from the results of experimental studies. Experimental studies were carried out on a single-cylinder gasoline engine UIT-85 with hydrogen additives up to 6% of the mass of fuel. The article shows the influence of hydrogen addition on the average velocity propagation of the flame front in the main combustion phase. The dependences of the turbulent propagation velocity of the flame front in the second combustion phase on the composition of the mixture and operating modes. The article shows the influence of the normal combustion rate on the average flame propagation velocity in the third combustion phase.

Combustion behaviors and flame microstructures of micro- and nano-titanium dust explosions

Particle size has significant effect on flame propagation behaviors in dust explosions. In this study, the flame propagation behaviors and microstructures in micro- and nano-titanium dust explosions were observed and compared. Results showed that flame propagation mechanisms in 50nm and 35μm titanium dust clouds were quite different. 50nm titanium dust flame was characterized by discrete single glowing burning particles with smooth spherical flame front. While 35μm titanium dust flame was marked by clusters of glowing burning particles with irregular flame front. 50nm titanium flame velocity was fluctuated more violent and the average flame propagation velocity was faster than that of 35μm titanium flame. In addition, micro explosion phenomenon occurred significantly in the burning process of 50nm titanium particles. SEM photos showed that 50nm titanium particles were approximately spherical shape with observably agglomerations before ignition. However, the combustion products exhibited complicated structures combined the spherical titanium oxides with considerable larger diameters and irregularly spliced smaller titanium oxides. 35μm titanium particles were in irregular shape before ignition, but in spherical shape after combustion. These results indicated that oxidation reaction occurred on the liquid surface of 35μm and 50nm titanium particles. From X-ray photoelectron spectroscopy, it was revealed that the dominant oxidation states of 35μm titanium combustion products was TiO2 (Ti4+), and to a much lesser extent of Ti2O3 (Ti3+). However, 50nm titanium combustion products contained 61% TiO2 (Ti4+), 18% Ti2O3 (Ti3+), 8% TiO (Ti2+) and 13% TiN (Ti3+).

Experimental and numerical investigation on premixed H2/air combustion

Experimental investigation and numerical simulation are performed to obtain the combustion characteristics of premixed hydrogen/air mixtures in a closed container, such as flame propagation velocity, peak pressure and maximum temperature. This paper mainly focused on the influence of initial temperature, hydrogen concentration and steam concentration on hydrogen/air flame propagation. An updated kinetics of hydrogen combustion based on one-step global reaction mechanism was validated by the present experimental data. The numerical results with updated kinetics show a satisfactory agreement with experimental results in term of average flame propagation velocity with the deviation less than 20%. The experimental and simulation results show that the average flame propagation velocity increases with the increase of initial hydrogen concentration and initial temperature, and reduces with the increase of initial steam concentration. The effect of hydrogen concentration on average flame propagation velocity is more significant than that of initial temperature and steam concentration.