本文選題：火花放電合成射流　切入點：唯象模擬　出處：《空氣動力學(xué)學(xué)報》2016年04期 　論文類型：期刊論文

【摘要】：為了指導(dǎo)火花放電式合成射流激勵器在超聲速流動控制中的應(yīng)用,數(shù)值模擬研究了火花放電合成射流與超聲速來流的相互干擾特性。研究表明火花放電式合成射流在超聲速流場中產(chǎn)生強烈擾動,產(chǎn)生較強的激波結(jié)構(gòu);隨著射流的噴出,激勵器上游分離區(qū)和流場中激波呈先增強后減弱的趨勢,激波由弓形激波逐漸弱化為斜激波,并且隨著放電能量的增加射流與主流的動量通量比不斷增大,射流的干擾和控制能力顯著增強。由于超聲速流的較大慣性及其對腔內(nèi)氣體的引射作用,激勵器的腔體回填速率大幅下降、回填時間明顯增長,使得激勵器的工作頻率受到很大限制。
[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.
【作者單位】： 國防科學(xué)技術(shù)大學(xué)航天科學(xué)與工程學(xué)院;
【基金】：國家自然科學(xué)基金(11372349) 全國優(yōu)秀博士論文作者專項資金(201058) 國防科技大學(xué)杰出青年基金(CJ110101)
【分類號】：V211.7
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本文編號：1606745