等离子射流近场特性的数值模拟
发布时间：2018-07-14 22:11
【摘要】：等离子射流点火技术在航空航天、武器工业及民用工业中均有应用。为了探索等离子射流的点火特性,对等离子射流在大气中瞬态膨胀扩展近场特性进行了数值模拟,获得了射流扩展过程中的压力、速度、温度分布以及两相界面演化特性。结果表明:等离子射流扩展过程中,射流近场逐渐形成马赫盘,并伴随射流分叉、聚合现象。正激波上游各参数均不随时间变化,下游参数随时间改变。射流前端面扩展位移计算值与实测值吻合较好。
[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.
【作者单位】： 清华大学汽车研究院(相城);南京理工大学能源与动力工程学院;
【基金】：国家自然科学基金(50776048)
【分类号】：O53;O358
本文编号：2123117
[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.
【作者单位】： 清华大学汽车研究院(相城);南京理工大学能源与动力工程学院;
【基金】：国家自然科学基金(50776048)
【分类号】：O53;O358
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