Study on the influence of surface roughness on the performance of regenerative cooling in liquid propellant engine

Document Type : Original Article

Author

mor

Abstract

Among the available coolingmethods in the combustion chamber of liquid propellant engine, regenerative cooling is widely used due to its good performance used. In this paper, a combustion chamber of liquid propellant engine is simulated numerically and effect of increasing cooling channel surface roughness on cooling performance is studied. The results showed that maximum temperature of combustion chamber wall is in the throat and by increasing surface roughness in cooling channel, the temperature in throat decrease and the heat transfer from the combustion gases to the cooling fluid increases. The temperature drop in the throat is  and  when water and liquid hydrogen is used as cooling fluid respectively. Also in the roughness height between  and  by increasing the surface roughness, temperature drop in throat increase.

Keywords


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