| YANG Qing 1 ， XU Rang-shu 1 ， XU Long 2 ， CHEN Kui-da 1.Numerical Simulation of Flow Field Characteristics of Aeroengine Outdoor Test Stand Crosswind Device[J].航空发动机,2024,50(5):167-174 |
| Numerical Simulation of Flow Field Characteristics of Aeroengine Outdoor Test Stand Crosswind Device |
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| Key Words:aeroengine outdoor test stand crosswind device numerical simulation flow field uniformity fan cluster |
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| Abstract: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. |
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