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研究并发展了一套进行高升阻比自然层流翼型多设计点/多设计目标的优化设计方法。为减少设计中的计算量,使用了XFOIL程序进行流场计算。使用基于响应面方法的优化方法进行最优化计算,并使用了不含二阶交叉项的二阶多项式模型作为响应面模型,大大减少了构造模型所需的试验次数,使进行更多设计变量和多点设计成为可能。试验点的选择满足D-优化准则。研究了设计点及目标函数的选择,进行了单点/单目标及多点/多目标的设计,结果表明:多点/多目标设计可以很好的改善单点设计中非设计点性能变差的缺点,设计结果有工程实用价值。
Research and development of a set of optimization design method of multi-design point / multi-design goal of natural laminar flow with high rise and drag ratio. To reduce the computational load in the design, the XFOIL program was used to calculate the flow field. Using the optimization method based on the response surface method to optimize the calculation and using the second-order polynomial model without second-order cross terms as the response surface model, the number of experiments required to construct the model is greatly reduced, and more design variables and Multi-point design becomes possible. The choice of test points satisfies the D-optimization criterion. The design of the design point and the objective function is studied. The design of single point / single target and multi-point / multi-target is carried out. The results show that the multi-point / multi-target design can improve the performance of non-design point The shortcomings of the design results have engineering value.