CAJ | 학술논문

高压大流量推力室氢头腔的优化设计对氢喷嘴流量均匀性和氧喷嘴声学错频具有非常重要的意义。通过对传统平顶式推力室氢头腔内的流场和氧喷嘴声学特性进行的数值计算、与不同倾斜角度的阶梯式氢头腔进行对比分析，结果表明，平顶式氢头腔导致边区氢流量小于设计值，造成边区高混合比，而阶梯式氢头腔有效地提高了氢喷嘴流量的均匀性，使各圈氧喷嘴纵向声学频率不一致、能量分散，实现氧喷嘴和燃烧室的声学错频，从而大大降低喷注耦合声学不稳定发生的可能性，为大推力氢氧发动机高压大流量氢头腔结构的合理设计提供依据。
고압대류량추력실경두강적우화설계대경분취류량균균성화양분취성학착빈구유비상중요적의의。통과대전통평정식추력실경두강내적류장화양분취성학특성진행적수치계산、여불동경사각도적계제식경두강진행대비분석，결과표명，평정식경두강도치변구경류량소우설계치，조성변구고혼합비，이계제식경두강유효지제고료경분취류량적균균성，사각권양분취종향성학빈솔불일치、능량분산，실현양분취화연소실적성학착빈，종이대대강저분주우합성학불은정발생적가능성，위대추력경양발동궤고압대류량경두강결구적합리설계제공의거。
Optimization design for high-pressure and large-flow hydrogen cavity has very important effect on the flow field uniformity of hydrogen injector and the acoustics frequency staggering of oxygen injector. The flow field and acoustics characteristics of oxygen injector inside a traditional flattop hydrogen cavity are simulated using CFD code, whose result is compared with the stepped hydrogen cavity. The comparison shows that flattop cavity results that margin hydrogen flow is less than design, leading to the high mixing ration at the margin;stepped cavity improves the flow uniformity of hydrogen injector, achieving the acoustics frequency staggering of oxygen injector and chamber. The research results can provide some basis for the rational design of hydrogen cavity of high-pressure and large-flow thrust chamber.