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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers >Stabilization of crossflow instability with plasma actuators: Linearized Navier-Stokes simulations
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Stabilization of crossflow instability with plasma actuators: Linearized Navier-Stokes simulations

机译：用等离子作动器稳定横流不稳定性：线性Navier-Stokes模拟

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摘要

This paper describes work carried out within the European Union (EU)-Russia Buterfli project to look at the control of transition-causing "target" stationary cross flow vortices, by the use of distributed plasma actuation to generate sub-dominant "killer" modes. The objective is to use the "killer" modes to control the "target" modes through a non-linear stabilizing mechanism. The numerical modelling and results are compared to experimental studies performed at the TsAGI T124 tunnel for a swept plate subject to a favorable pressure gradient flow. A mathematical model for the actuator developed at TsAGI was implemented in a linearized Navier-Stokes (LNS) solver and used to model and hence predict "killer" mode amplitudes at a measurement plane in the experiment. The LNS analysis shows good agreement with experiment, and the results are used as input for non-linear parabolized stability equation (PSE) analysis to predict the effect of these modes on crossflow transition. Whilst the numerical model indicates a delay in transition, experimental results indicated an advance in transition rather than delay. This was determined to be due to actuator-induced unsteadiness arising in the experiment, resulting in the generation of travelling crossflow disturbances which tended to obscure and thus dominate the plasma stabilized stationary disturbances.
机译：本文介绍了在欧盟（EU）-俄罗斯Buterfli项目中开展的工作，旨在通过使用分布式等离子体致动来生成次要的“杀手”模式来控制引起过渡的“目标”平稳错流涡流。 。目的是使用“杀手”模式通过非线性稳定机制来控制“目标”模式。数值模型和结果与在TsAGI T124隧道中进行的实验研究进行了比较，该实验针对的是经过有利压力梯度流动的后掠板。在线性Navier-Stokes（LNS）求解器中实现了在TsAGI开发的执行器的数学模型，该模型用于建模并预测实验中测量面上的“杀手”模式振幅。 LNS分析与实验结果吻合良好，其结果可作为非线性抛物线稳定性方程（PSE）分析的输入，以预测这些模式对错流过渡的影响。数值模型表明过渡存在延迟，实验结果表明过渡存在进展而不是延迟。确定这是由于实验中由执行器引起的不稳定性所致，导致产生了行进的横流扰动，该扰动趋于模糊并因此支配了等离子体稳定的固定扰动。

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