固体火箭技术2024，Vol.47Issue(3)：331-340,10.DOI:10.7673/j.issn.1006-2793.2024.03.005
反应性气膜对喷管附面层损失的影响
Influence of reactive gas film on nozzle boundary layer loss
摘要
Abstract
Aiming at the two-dimensional axisymmetric nozzle,the effect of reactive gas film of hydrogen and n-decane on the nozzle boundary layer loss was investigated by numerical simulation.For the two different injection materials,the boundary layer loss of nozzle under different injection ratios of 0%,0.47%,1.07%and 1.42%were analyzed and compared.The results show that the re-active gas film formed by the wall injection significantly reduces the nozzle wall temperature compared to the non-injection case.When the injection ratio increases from 0%to 1.42%,the hydrogen reactive gas film makes the average wall temperature of the noz-zle expansion section reduced by 2648.3 K.However,the n-decane reactive gas film causes the average wall temperature of the nozzle expansion section to decrease by 1875.9 K.The n-decane injection is not beneficial to reduce the boundary layer loss of the nozzle,which increases the nozzle boundary layer loss by 504.3%.Meanwhile,hydrogen injection is conducive to reducing the nozzle bound-ary layer loss,which reduces the boundary layer loss by 38.8%.Therefore,the hydrogen reactive film is more beneficial to improve thermal protection and drag reduction of nozzle boundary layer.关键词
反应性气膜/喷管/附面层损失/火箭发动机/热防护Key words
reactive gas film/nozzle/boundary layer loss/rocket motor/heat protection分类
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程群力,刘殊远,王佩佩,胡松启,张微萌,刘林林..反应性气膜对喷管附面层损失的影响[J].固体火箭技术,2024,47(3):331-340,10.基金项目
国家自然科学基金(52276087,51806048). （52276087,51806048）
