In order to analyze the flow field characteristics of the crosswind device,a full-scale CFD numerical simulation model was established.The lumped parameter model was used to simulate the fan flow,and the effects of flow straightener,fan layout and natural wind on the flow field characteristics of the device were studied.The calculation results show that the dynamic pressure coefficient of the test area can be less than or equal to 0.005 by adding three layers of damping screens with opening ratios of 0.5 to 0.55 in the settling sec-tion,which alleviates the adverse effects of fan layout and sudden contraction of the contraction section on the outlet flow field quality;The flow rate of the outer ring fan is lower than that of the central fan,and the fan combinations with different layout have different flow field characteristics and natural wind interference resistant ability;The natural wind with an angle of 30° or less between the wind direction and the axis of the device has little influence on the quality of the flow field and is beneficial to the flow rate,While the angle is greater than 60°,the fans near the wind direction are greatly disturbed,and the jet direction at the outlet of the device deflects greatly.This study has significant reference value for the design,application,and improvement of an aeroengine outdoor crosswind device,as well as further simulation analysis of water jet and sand blasting characteristics.
关键词
航空发动机/露天试车台/侧风试验装置/数值模拟/流场均匀性/风机集群
Key words
aeroengine/outdoor test stand/crosswind device/numerical simulation/flow field uniformity/fan cluster
维普
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