等离子体气动激励对二维气膜冷却效果影响的机理

发布时间：2017-12-31 12:05

本文关键词：等离子体气动激励对二维气膜冷却效果影响的机理　出处：《空军工程大学学报(自然科学版)》2016年05期 　论文类型：期刊论文

【摘要】：为了研究等离子体气动激励对二维气膜冷却效果的影响规律,基于等离子体气动激励唯象学模型,将等离子体气动激励对冷却气流的宏观作用等效为体积力,通过耦合求解体积力与Navier-Stokes方程,得到了气膜冷却的流场和温度场特性。计算结果表明:气膜缝出口壁面附近冷流经过等离子体气动激励作用后,速度水平分量提高较大,竖直分量提高较小;随着吹风比的增大,气膜缝出口冷流的流量和动量增加,气膜冷却效率增加,但等离子体气动激励对冷却气流的影响减弱,气膜冷却效率增加量减小。施加等离子体气动激励后,在各吹风比下,随着气膜缝倾角的增加,气膜冷却效率逐渐降低;等离子体气动激励等效体积力大小对气膜冷却效果有较大影响,气膜冷却效率随体积力的增大先升高后降低,存在一个最佳等效体积力值。
[Abstract]:In order to study the influence of plasma aerodynamic actuation of the two-dimensional film cooling effect, plasma aerodynamic actuation phenomenological model based on the plasma aerodynamic actuation of the equivalent macro function of cooling airflow volume, by coupling ofvolume product force with Navier-Stokes equation, get the film cooling flow field and temperature field characteristics results show that the gas film wall near the exit slit flow through the cold plasma actuation effect, the horizontal component of the vertical component increased smaller; with the increase of blowing ratio, gas flow and the momentum of export of Film Slit cold flow increases, increase the efficiency of film cooling, but the effect of plasma aerodynamic actuation the cooling air flow decreases, the film cooling efficiency is increased decreased. Applying plasma aerodynamic actuation, the blowing ratio, with the increase of Film Slit angle, film cooling efficiency gradually reduced Low plasma aerodynamic actuation; equivalent volume force has a great influence on the film cooling effectiveness, the film cooling efficiency with the increase of volume stress increased first and then decreased, there is an optimal equivalent volume force value.

【作者单位】：空军工程大学航空航天工程学院;陆军航空兵研究所;
【基金】：国家自然科学基金(51276196)
【分类号】：V231.1
【正文快照】： 引用格式:何立明,赵子晨,肖阳,等.等离子体气动激励对二维气膜冷却效果的影响机理[J].空军工程大学学报:自然科学版,2016,17(5):1?7.HE Liming,ZHAO Zichen,XIAO Yang,et al.A Mechanism Study of an Effect of Plasma Aerodynamic Actuation on 2DFilm Cooling Effec-tivenes

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