| 层板发汗冷却结构的非均匀温度分布受热皱损的求解 |
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| 引用本文： | 张峰,刘伟强.层板发汗冷却结构的非均匀温度分布受热皱损的求解[J].航空学报,2007,28(1):138-141. |
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| 作者姓名： | 张峰 刘伟强 |
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| 作者单位： | 国防科技大学,航天与材料工程学院,湖南,长沙,410073 |
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| 摘 要： | 液体火箭发动机发汗冷却推力室的结构层板可能出现受热皱损。采用三边简支、一边自由的矩形薄板，应用伽辽金法，提出满足边界条件的试函数，求解了层板的扩散流动区任意温度分布下的非均匀热应力的结构稳定性问题。以温度分布为线性时的热应力为例，分析了典型的层板发汗冷却结构的受热变形，获得了层板发汗缝隙宽度和层板厚度之间的关系，并与均布热应力计算结果进行了对比，得到了避免层板受热皱损的更精确的计算方法。
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| 关 键 词： | 发汗冷却 结构层板 热皱损 热应力 非均匀 |
| 文章编号： | 1000-6893(2007)01-0138-04 |
| 修稿时间： | 2005年9月8日 |
Analysis of Thermal Wrinkling Resulted from Non-uniform Temperature Distribution in Transpiration Cooling Formed Platelets |
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| ZHANG Feng,LIU Wei-qiang.Analysis of Thermal Wrinkling Resulted from Non-uniform Temperature Distribution in Transpiration Cooling Formed Platelets[J].Acta Aeronautica et Astronautica Sinica,2007,28(1):138-141. |
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| Authors: | ZHANG Feng LIU Wei-qiang |
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| Institution: | College of Astronautics and Material Engineering, National University of Defense Technology |
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| Abstract: | Heat transfer possibly results in the thermal wrinkling of transpiration cooling platelet for the Liquid Rocket Engine(LRE)’s thrust chamber. The rectangular sheet which has 3 freely-supported sides and 1 free side is assumed for the formed platelets. Applying Galerkin’s method, trial function satisfying the boundary conditions is brought out. Stability in the diffuse flow field of the formed platelet is analytically solved by Galerkin’s method when the thermal compressive stress affecting of the platelet is not uniform. |
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| Keywords: | transpiration cooling formed platelet thermal wrink ling thermal stress non-uniform |
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