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采用三维N-S方程和标准k-ε方程模型对自行设计的风量试验台的多层孔板整流装置在两种送风方式(侧送/上送)下的整流效果进行了数值分析,结果表明转弯处分离流动堵塞了测量流道,并进一步影响到通过整流装置后相对喷嘴的来流均匀性,最终影响了上送风方式测量精度.通过对采用两种送风方式整流效果的比较,探讨了试验台多层孔板整流装置加速主流、耗散涡流的整流机制.研究结果为类似的外特性性能试验台的设计及精度评估,提供了依据和参考.
The three-dimensional Navier-Stokes equations and the standard k-ε equation model were used to analyze the rectification effect of the multi-orifice plate rectifiers of the self-designed air volume test rig under the two blast modes (side-on / off- The separation of the flow blockage of the measurement of the flow channel and further affect the flow uniformity through the rectifier device relative to the nozzle, the final impact on the accuracy of the upper air supply method.By comparing the rectification effect of the two air supply methods, The multi-orifice plate rectification device on the test bed accelerates the rectification mechanism of the mainstream and dissipation eddy current.The research results provide the basis and references for the design and accuracy evaluation of the similar external characteristic performance test rig.