Abstract
The paper presents a verification of calculation modeling methods of atomizing of a gas and gas-liquid stream from a pneumatic nozzle based on the experimental data obtained in the IT SB RAS. Turbulent supersonic flow of compressible gas is considered here. Mathematical model includes description of gas phase motion based on the RANS (Reynolds Averaged Navier-Stokes) and URANS (Unsteady RANS) approach using two-parameter turbulence model k-ω SST and Reynolds Stress Model (RSM). The Lagrange method was used to model flow of water droplets. Dispersed phase is solved by tracking a large number of droplets through calculated flow field. Dispersed phase can exchange momentum, mass, and energy with fluid phase. Comparative analysis showed an acceptable qualitative and quantitative agreement between calculation and experiment, both for subsonic and supersonic flow.
Highlights
The world is actively exploring prospective slurry alternative fuels for energy production, which consist of water, crushed coal or fuel waste of its processing, and other additives
The group of researchers at the Institute of Thermophysics of the Russian Academy of Sciences has proposed a pneumatic nozzle [4, 5] based on using properties of wall and cumulative jets and the Coanda effect
Determining role in efficiency of pneumatic nozzle is played by organization of gas flows
Summary
The world is actively exploring prospective slurry alternative fuels for energy production, which consist of water, crushed coal or fuel waste of its processing, and other additives. Such fuels are called [1,2,3] organic coal-water (OCWF). Efficiency of the pneumatic nozzle for spraying organic coal-water fuel (OCWF) is determined by organization of gas flows. Determining role in efficiency of pneumatic nozzle is played by organization of gas flows. To study the structure of gas-liquid flows of proposed pneumatic nozzle, it is necessary to develop an efficient and reliable numerical modeling methods technique for describing atomization of liquid fuels in perspective burners
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