【摘要】：等離子射流點(diǎn)火技術(shù)在航空航天、武器工業(yè)及民用工業(yè)中均有應(yīng)用。為了探索等離子射流的點(diǎn)火特性,對(duì)等離子射流在大氣中瞬態(tài)膨脹擴(kuò)展近場(chǎng)特性進(jìn)行了數(shù)值模擬,獲得了射流擴(kuò)展過程中的壓力、速度、溫度分布以及兩相界面演化特性。結(jié)果表明:等離子射流擴(kuò)展過程中,射流近場(chǎng)逐漸形成馬赫盤,并伴隨射流分叉、聚合現(xiàn)象。正激波上游各參數(shù)均不隨時(shí)間變化,下游參數(shù)隨時(shí)間改變。射流前端面擴(kuò)展位移計(jì)算值與實(shí)測(cè)值吻合較好。
[Abstract]:Plasma jet ignition technology has been applied in aerospace, weapon industry and civil industry. In order to investigate the ignition characteristics of plasma jet, the near field characteristics of transient expansion and propagation of plasma jet in the atmosphere were simulated. The pressure, velocity, temperature distribution and evolution characteristics of two-phase interface were obtained. The results show that in the process of plasma jet propagation, the Mach disk is formed gradually in the near field of the jet, which is accompanied by the bifurcation and polymerization of the jet. The upstream parameters of the positive shock wave do not change with time, but the downstream parameters change with time. The calculated displacement of the front end of the jet is in good agreement with the measured value.
【作者單位】： 清華大學(xué)汽車研究院(相城);南京理工大學(xué)能源與動(dòng)力工程學(xué)院;
【基金】：國(guó)家自然科學(xué)基金(50776048)
【分類號(hào)】：O53;O358

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