CAJ | 학술논문

为了评估复合喷管热防护性能以及获取喷管烧蚀和结构应力分析的工况条件，运用Fluent流体动力学软件，对复合喷管的结构温度场进行了数值仿真。分析中，采用了两方程RNG k?ω湍流模型和增强型壁面函数，利用流固耦合的计算方法，获得了喷管结构瞬态温度场的计算结果，重点分析了结构温度场最终分布状态和初期传播特点，以及喉衬温度随时间的变化规律，估算了喉衬的烧蚀。分析结果表明，喷管结构热防护性能满足要求，温度最高区域位于喷管收敛段中后部，喉衬线烧蚀量约为2．1 mm，为喷管结构进一步优化设计提供了重要参考依据。
위료평고복합분관열방호성능이급획취분관소식화결구응력분석적공황조건，운용Fluent류체동역학연건，대복합분관적결구온도장진행료수치방진。분석중，채용료량방정RNG k?ω단류모형화증강형벽면함수，이용류고우합적계산방법，획득료분관결구순태온도장적계산결과，중점분석료결구온도장최종분포상태화초기전파특점，이급후츤온도수시간적변화규률，고산료후츤적소식。분석결과표명，분관결구열방호성능만족요구，온도최고구역위우분관수렴단중후부，후츤선소식량약위2．1 mm，위분관결구진일보우화설계제공료중요삼고의거。
In order to estimate the heat protection performance and obtain the temperature load for erosion calculation and struc?tural stress analysis, temperature numerical simulation of composite nozzle thermo?structure was implemented by the Fluent CFD software using the fluid?structure coupled method. In the computation, the RNG k?ωturbulence model and the enhanced wall treat?ment method were selected. The temperature distributions at the end of working time and its evolution in initial period were ana?lyzed, and the feature of nozzle throat temperature field with time?varying was investigated. The throat erosion was also estimated by diffusion control model. The simulation results show that the thermo?structure meets the heat protection requirement. The highest temperature zone is located in the middle and posterior portion of nozzle convergent section. The linear erosion thickness of nozzle throat is about 2.1 mm. The results also offer technical support for further optimizing the design of the nozzle thermo?structure.