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基于分区迭代推进方法的锥体热环境研究 被引量:7

Thermal Environment of Cone Body Based on Division Iterative Marching Method
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摘要 针对锥体热环境问题,提出了气动热与结构传热的分区迭代推进分析方法。其中流场采用有限体积法计算,空间离散采用AUSM+格式。时间推进采用显示多步Runge-Kutta格式,结构热传导采用有限元方法求解,而数据传递采用基于虚拟空间的插值方法。圆管验证算例分析显示,2 s时刻驻点处的热流密度和温度的计算值与试验值的相对误差分别为1.34%和4.95%。最后进行了直二次圆锥体的热环境分析,壁面初始热流密度值与试验值吻合得很好,其中驻点热流的计算值与试验值的相对误差为3.1%。耦合分析过程中驻点温度随时间的推移而升高,且上升趋势逐渐变缓,最终趋于稳态值。此外时间的变化对锥体表面压强的影响可忽略不计,而壁面热流却随时间的增加而降低。 The division iterative marching method on aerodynamic heating and structural heat transfer for the thermal environment of the cone body is presented. The flow field is calculated by the finite volume method. Spatial discretization scheme uses AUSM +. Explicit multi - step Runge-Kutta is used to calculate time iteration scheme. However,the structural heat transfer is calculated by the finite element method. Besides, the data exchange on the coupled wall is conducted by the interpolation method based on the virtual space. The verification example on the circular tube is analyzed,and the relative errors between the calculated values and corresponding test values for the heat flux and temperature of the stagnation point are 1.34% and 4.95% respectively at 2 s. Finally,the analysis on thermal environment of the straight biconic body is conducted. The initial wall heat flux is well matched with the experimental result,and the relative error between calculated value and experimental value at stagnation point is 3.1%. The temperature at the stagnation point increases with the time,and the upward trend slows down gradually. Finally it tends to the steady-state value. The time almost has no influence on the wall pressure,but the wall heat flux decreases with the increase of the time.
作者 黄杰 姚卫星 HUANG Jie;YAO Weixing(Key Laboratory of Fundamental Science for National Defense-Advanced Design Technology of Flight Vehicle,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China;State Key Laboratory of Mechanics and Control of Mechanical Structures,Nanjing University of Aeronautics & Astronautics,Nanjing,210016,China)
出处 《南京航空航天大学学报》 EI CAS CSCD 北大核心 2019年第1期90-97,共8页 Journal of Nanjing University of Aeronautics & Astronautics
基金 江苏高校优势学科建设工程资助项目
关键词 热环境 气动热 结构传热 有限体积法 有限元法 thermal environment aerodynamic heating structural heat transfer finite volume method finite element method
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