Combustion Characteristics Of Methanol Research Articles

Study on the combustion characteristics and reaction mechanism of aluminum/alcohol-based nanofluid fuel

Enhancing the volumetric energy density of fuels is a crucial approach in the exploration of efficient energy sources. As a commonly used high-energy additive, Aluminum nanoparticles (Al NPs) holds broad application prospects. This study delves into the effects of Al NPs on the combustion characteristics of methanol and ethanol fuels through in-depth analysis of single droplet combustion and spray combustion experiments involving alcohol-based nanofluid fuels. The experiments revealed that adding Al NPs significantly enhances fuel combustion efficiency, shortening both the combustion life and ignition delay time. Spray combustion tests demonstrated that adding 2 wt% Al NPs increased the maximum and average flame propagation speeds of ethanol fuel spray by 48.93 % and 47.94 %, respectively, while the maximum explosion pressure rose from 0.66MPa to 0.83MPa, with a reduced time to reach peak explosion pressure by 106ms. Based on the SEM and XRD characterization results of the combustion residues and the analysis of flame morphology, a physical model of the alcohol-based nanofluid fuel spray combustion flame was established. Numerical simulations of the gas-phase kinetics model showed that the generation rates of radicals such as H, O, and OH were significantly increased with the addition of Al NPs, intensifying the combustion reaction. The findings provide a theoretical basis for future fuel design and combustion performance optimization.

The Effect of Water Content on the Combustion Characteristics of Methanol in the Oxy-fuel System

The Effect of Water Content on the Combustion Characteristics of Methanol in the Oxy-fuel System

Impact of Water Content on Energy Potential and Combustion Characteristics of Methanol and Ethanol Fuels

Methanol and ethanol are among the most important biofuels and raw materials used to produce biorenewable fuels. These fuels are used with varying water contents. Nevertheless, the exact impact of the water content of these fuels on the energy potential and combustion characteristics is still unknown. Besides that, there are two noticeable risks (environmental impact of combustion and fire risk) associated with their production, processing, and utilization. Likewise, impact of the water content of these fuels on fire risk and the impact of their combustion on the environment is also unknown. The best indicator of energy potential is the effective heat of combustion, and the best combustion characteristic and indicator of the impact of the combustion of alcohols on the environment is the carbon monoxide (CO) yield, whereas the fire risk of liquid fuels is quantified by the flash point and maximum heat release rate (mHRR). The dependency of flash point on the water content was determined via the Pensky-Martens apparatus and the dependencies of the effective heat of combustion, CO yield, and mHRR on the water content were determined via the cone calorimeter. With increased water content, the flash points of both methanol and ethanol exponentially increased and the both effective heat of combustion and mHRR almost linearly decreased. In the range of water content from 0 to 60%, the CO yield of both methanol and ethanol was practically independent of the water content.

メタノール燃料のディーゼル燃焼に関する実験研究

Works with invaluable much experience obtained in the field of automotive engines, there are still many technological hardships to burn methanol on marine diesel engines because of the differences between marine-and automotive diesel engines, especially in dimension and main particulars.So injection-and combustion characteristics of dual fuel are examined with a high pressurized chamber and an inertial rapid compression machine.As a result, the following fundamentals are obtained:(1) Coefficient of flow rate for methanol is equal that for gas oil.(2) Equation for penetration of gas oil spray can be applied to methanol spray.(3) Methanol flame is blue, which suggests that lesser soot will be generated than gas oil.(4) Combustion characteristics of methanol is influenced considerably by quantity, injection direction and injection timing of pilot fuel.(5) Combustion characteristics of methanol can be made comparable to that of gas oil by adjusting the parameters above mentioned in (4) .