液体姿控火箭发动机地面试验热结构分析
Analysis of thermo-structure for attitude liquid rocket engine in ground test
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摘要: 以液膜冷却结合辐射冷却的液体姿控火箭发动机为研究对象.采用一体化计算模型分析传热,同时应用有限元方法对给定温度条件的热结构进行了耦合分析,最后讨论了推力室在外压作用及温度载荷条件下结构的屈曲稳定性.计算结果与参考的试验结果接近,最高温度误差为3.67%,说明该一体化计算传热模型的有效性.考虑热载荷作用得到的屈曲载荷值较不考虑热载荷作用提高了大约5.7933%.该结果为工程设计提供了有益的参考.Abstract: A research on the attitude liquid rocket engine using the film cooling and radiation cooling methods was performed.A model based on film cooling heat transfer,which employs an integrated analysis method,was presented by this paper.The finite element method (FEM) was used for coupling analysis of the thermal and structure of thruster chamber under the condition of calculated wall temperature and pressure distributions.At last,with use of the FEM,the thruster chamber buckling was discussed under the condition of the given temperature,pressure and the load of external pressure.The result was close to the referenced experiment result,with the greatest temperature error of 3.67%.The result indicates that the integrated analysis method for the simulation of heat transfer is efficient;taking into account of the thermal load,the buckling load is increased about 5.7933% than that without thermal load.The results provide some theory support for engineering applications.
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Key words:
- attitude liquid rocket engine /
- thruster chamber /
- film cooling /
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