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上海交通大学在建的多功能低速风洞具有串列式的大小两个试验段。为提高边界层试验时的工作效率,将在大试验段的转盘前部设置自动升降粗糙元装置。为模拟风浪流联合作用环境下船舶/海洋工程结构物的流体动力响应,由旁路风道将风引至循环水槽测试部的上方,并且该测试部的风速可以随时间周期变化。为提高大试验段的流场指标,在与试验结果对比的基础上,用CFD方法模拟了风洞的内部流场,基于DOE结果生成了Kriging模型,采用多岛遗传算法得到最优解。研究结果表明优化设计的结果显著提高了流场的性能指标。
Shanghai Jiao Tong University is building a multi-functional low-speed wind tunnel with a series of two sizes of experimental sections. In order to improve the working efficiency of the boundary layer test, an automatic lifting rough element device will be set in the front of the turntable in the large test section. To simulate the hydrodynamic response of the ship / marine structure under the combined action of wind and wave currents, the bypass duct directs the wind over the circulating tank test section and the wind speed of the test section may change over time. In order to improve the flow field index of the large test section, CFD method was used to simulate the internal flow field of the wind tunnel. Kriging model was generated based on the DOE results. The optimal solution was obtained by multi-island genetic algorithm. The results show that the results of the optimization design significantly improve the performance of the flow field.