高海况两相流下S弯进气道多目标优化设计OA

To address the performance improvement requirements of inlet systems for sea-skimming aircraft under high-sea-state conditions,a multi-objective optimization study of an S-bend inlet in gas-liquid two-phase flow was conducted.Firstly,an S-bend inlet model incorporating seven key design variables was developed using a parametric method based on super-elliptic cross-sections.Subsequently,optimal Latin hypercube sampling combined with sensitivity analysis was utilized to systematically reveal pronounced nonlinear and interaction effects among the design parameters,with the second-order effect of the cross-section super-elliptic exponent being particularly prominent.On this basis,a high-efficiency multi-objective optimization framework was established by coupling a Kriging surrogate model with the NSGA-Ⅱ algorithm to achieve a balance between maximizing the total pressure recovery coefficient and minimizing the distortion index.The results show that,compared with the reference inlet,the optimized inlet achieves a total-pressure recovery coefficient of 0.994(a relative increase of 0.71％)and a distortion index reduction of 24.6％,while maintaining robust performance within the water-ingestion ratio range of 5％-20％.