火箭推进2018，Vol.44Issue(1)：22-26,5.
再生冷却燃气对流换热系数计算方法优化研究
Optimization for calculation method of gas convective heat transfer coefficient inside regeneratively-cooled chamber
吴有亮 1张成印 1潘浩 1李强 1程圣清1
作者信息
摘要
Abstract
The gas convective heat transfer coefficient inside the liquid rocket engine combustion chamber is usually evaluated by using the Bartz equation. As the Bartz equation does not take account the influence of combustion zone distribution in the thrust chamber,thickness variation of the boundary layer and other actual situations on fuel gas heat flux,it can not well present the gas heat flux density distribu-tion inside combustion chamber,especially in the combustion zone near the injector. It is not fit well with the results of the experiments. In this paper,a modified Bartz equation is introduced. This modified Bartz equation take account the effects of combustion zone distribution,thickness variation of the boundary lay-er and flow acceleration in nozzle. The modified method of Bartz equation is determined. Pavli equation was used to evaluate the gas heat transfer coefficient. The comparison results show that the result calculat-ed by the modified Bartz equation is fit well with the result of LOX/methane thrust chamber experiment. The modified Bartz equation was used to analyze the effect of the chamber pressure and mixture ratio on regeneratively-cooled chamber performance.关键词
液氧/甲烷发动机/再生冷却/传热/巴兹法Key words
LOX/methane engine/regenerative cooling/heat transfer/Bartz equation分类
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吴有亮,张成印,潘浩,李强,程圣清..再生冷却燃气对流换热系数计算方法优化研究[J].火箭推进,2018,44(1):22-26,5.
