| 杨 庆1 ，徐让书 1 ，徐龙2 ，陈魁炟 1.航空发动机露天侧风试验装置流场特性数值模拟[J].航空发动机,2024,50(5):167-174 |
| 航空发动机露天侧风试验装置流场特性数值模拟 |
| Numerical Simulation of Flow Field Characteristics of Aeroengine Outdoor Test Stand Crosswind Device |
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| DOI： |
| 中文关键词: 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 |
| 英文关键词:aeroengine outdoor test stand crosswind device numerical simulation flow field uniformity fan cluster |
| 基金项目: |
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| 摘要点击次数: 122 |
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| 中文摘要: |
| 为了分析侧风试验装置的流场特性，建立了真实尺寸的CFD数值仿真模型，利用集总参数模型模拟了风机流动，研究了
整流装置、风机布局和自然风对装置流场特性的影响。结果表明：稳定段加装3层开孔率为0.50~0.55的阻尼网可以使试验区动压
系数μ≤0.005，改善了风机布局和收缩段突缩对出口流场品质产生的不利影响；装置内部外圈风机的流量低于中心风机的，且不同
布局的风机组合具有不同的流场特性和抗自然风干扰能力；风向与装置轴线夹角为30°及以下的自然风对流场品质影响较小且有
利于风机风量的输出，而夹角大于60°时装置内靠近风向一侧的风机受到的扰动较大，同时装置出口的射流方向发生大幅度偏转。
研究结论对于航空发动机露天侧风试验装置的设计、使用和完善，以及进一步开展喷水、喷砂特性的模拟分析具有较大参考价值。 |
| 英文摘要: |
| 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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