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首页> 外文会议>International Conference Complex Systems: Control and Modeling Problems >Evaluation of the impact of stall phenomena on the characteristics of the fan using the NLH method
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Evaluation of the impact of stall phenomena on the characteristics of the fan using the NLH method

机译：使用NLH方法评估失速现象对风扇特性的影响

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The paper presents the results of numerical simulation of the effect of flow non-uniformities at the engine inlet on the engine fan workflow. Flow non-uniformities are created by extending the interceptor into the flow path of inlet device like as it is often done during field tests. The authors have created a numerical model capable of considering unsteady processes in the fan using nonlinear harmonic analysis. As a result, qualitative and quantitative estimates of the influence of overlapping of the inlet duct by the interceptor on the main parameters of the fan workflow were obtained. It is shown that the more the duct is blocked, the more its parameters are deteriorated. Moreover, the deterioration is not linear, but according to the dependence of the 2nd order.
机译：本文介绍了数值模拟的结果，该数值模拟了发动机进气口处流动不均匀性对发动机风扇工作流程的影响。流动不均匀性是通过将拦截器延伸到入口设备的流路中而产生的，就像在现场测试中经常这样做那样。作者创建了一个数值模型，该模型可以使用非线性谐波分析来考虑风扇中的不稳定过程。结果，获得了拦截器对进气管道的重叠对风扇工作流程主要参数的影响的定性和定量估计。结果表明，管道阻塞得越多，其参数恶化的程度就越大。此外，劣化不是线性的，而是根据二阶的依赖性。

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