火花放电合成射流与超声速来流相互干扰特性数值模拟研究

发布时间：2018-03-13 14:18

  本文选题：火花放电合成射流　切入点：唯象模拟　出处：《空气动力学学报》2016年04期 　论文类型：期刊论文

【摘要】：为了指导火花放电式合成射流激励器在超声速流动控制中的应用,数值模拟研究了火花放电合成射流与超声速来流的相互干扰特性。研究表明火花放电式合成射流在超声速流场中产生强烈扰动,产生较强的激波结构;随着射流的喷出,激励器上游分离区和流场中激波呈先增强后减弱的趋势,激波由弓形激波逐渐弱化为斜激波,并且随着放电能量的增加射流与主流的动量通量比不断增大,射流的干扰和控制能力显著增强。由于超声速流的较大惯性及其对腔内气体的引射作用,激励器的腔体回填速率大幅下降、回填时间明显增长,使得激励器的工作频率受到很大限制。
[Abstract]:In order to guide the application of spark discharge synthetic jet actuator in supersonic flow control, Numerical simulation is carried out to study the interaction between spark discharge synthetic jet and supersonic flow. The results show that the spark discharge synthetic jet produces strong disturbance and strong shock structure in supersonic flow field. The shock wave in the upstream separation zone and in the flow field of the exciter shows a tendency of first increasing and then weakening. The shock wave is gradually weakened from the bow shock to the oblique shock, and the momentum flux ratio between the jet and the mainstream increases with the increase of discharge energy. Because of the large inertia of supersonic flow and its ejection of gas in the cavity, the backfilling rate of the cavity of the exciter decreases significantly, and the backfill time increases obviously. The working frequency of the exciter is limited greatly.
【作者单位】： 国防科学技术大学航天科学与工程学院;
【基金】：国家自然科学基金(11372349) 全国优秀博士论文作者专项资金(201058) 国防科技大学杰出青年基金(CJ110101)
【分类号】：V211.7
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本文编号：1606745