基于定涡黏性假设的连续伴随优化方法研究

发布时间：2018-04-14 12:42

本文选题：伴随方法 + 湍流模型　；参考：《工程热物理学报》2016年01期

【摘要】：基于网格节点位置坐标变分并结合通量雅克比矩阵技术,完成了定涡黏性假设下带湍流模型连续伴随系统的建立,极大降低了RANS方程下复杂伴随系统的推导难度,简化了伴随系统表达式,节约了计算资源。同时采用定涡黏性假设耦合SpaIart-Allmaras湍流模型,实现了二维叶栅壁面压力反设计的数值验证,针对变量梯度、优化过程及结果与全湍流系统进行了分析对比;并以通道内熵增为优化目标完成了某亚音速叶栅基于该假设的气动优化及叶栅吹风试验,试验结果验证了优化设计结果的可靠性。
[Abstract]:Based on the grid node coordinate variation and flux Jacobian matrix technique, the continuous adjoint system with turbulent model under the assumption of constant vorticity viscosity is established, which greatly reduces the difficulty of derivation of complex adjoint system under RANS equation.The expression of adjoint system is simplified and computational resources are saved.At the same time, using the SpaIart-Allmaras turbulence model coupled with the constant vorticity viscosity hypothesis, the numerical verification of the two-dimension cascade wall pressure back design is realized. The optimization process and the results are compared with the whole turbulent system according to the variable gradient, the optimization process and the results.The aerodynamic optimization and cascade blowing test of a subsonic cascade based on this hypothesis are carried out with entropy increase in the channel as the optimization objective. The experimental results verify the reliability of the optimized design results.
【作者单位】：西安交通大学能源与动力工程学院叶轮机械研究所;
【基金】：国家自然科学基金资助项目(No.51076121)
【分类号】：O357.5

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