论文部分内容阅读
探索了基于混合网格的近场预测以及基于波形参数法的远场预测相结合的声爆预测方法,综合利用了结构化网格计算效率高以及非结构网格对复杂外形适应性好的优点,在保证声爆预测精度的基础上提高了计算效率。在此基础上,建立了基于声爆预测方法、响应面模型和Pareto遗传算法的声爆/气动一体化设计方法。分析表明,发动机短舱对超声速升阻特性和声爆特征都有较大影响,利用声爆/气动一体化设计方法对发动机短舱位置进行了一体化设计研究。结果表明,建立的响应面模型的精度完全满足要求,根据不同的设计偏向选择了三种优化方案,优化后方案的性能较原始方案都有不同程度的提高。
The acoustic explosion prediction method based on mixed-grid near-field prediction and far-field prediction based on waveform parameter method is explored, which takes advantage of the high computational efficiency of structured grid and the good adaptability of unstructured grid to complex shape , Which improves the computational efficiency on the basis of ensuring the sound burst prediction accuracy. On this basis, the sound explosion / aerodynamic design method based on acoustic explosion prediction method, response surface model and Pareto genetic algorithm is established. The analysis shows that the engine nacelle has a great influence on the supersonic speed rising and dragging characteristics and sound explosion characteristics, and the integrated design of the engine nacelle has been carried out by the integrated design method of sound explosion and air pneumatics. The results show that the accuracy of the established response surface model fully meets the requirements. Three optimization schemes are selected according to different design bias. The performance of the optimized scheme is improved to some extent compared with the original scheme.