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国家自然科学基金(10772016)

作品数:4 被引量:15H指数:2
相关作者:王海兴陈熙潘文霞韩东升更多>>
相关机构:清华大学北京航空航天大学中国科学院力学研究所更多>>
发文基金:国家自然科学基金国家教育部博士点基金更多>>
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湍流空气自由射流引射特性的比较研究被引量:1
2011年
对商用CFD软件中的四种湍流模型给出的湍流空气自由射流引射特性计算结果进行了比较,并将采用四种湍流模型计算获得的射流引射量计算数据与文献报道的采用多孔壁技术获得的射流引射量实验数据进行了对比,结果表明:在四种湍流模型中,标准K-ε湍流模型给出的湍流空气自由射流引射规律与实验数据较好符合。本文还选用标准K-ε湍流模型对久膨胀超声速湍流空气自由射流的引射特性进行了初步的探索研究。
韩东升王海兴陈熙
关键词:湍流模型空气射流
湍流空气射流引射特性的模拟研究被引量:2
2008年
本文采用数值模拟方法,研究了湍流空气射流对环境空气的引射特性,包括等温射流和非等温射流情形。结果表明,由于射流不停地引射环境空气,射流"势核"区下游的温度与轴向速度迅速降低;射流引射量的模拟结果与文献中报道的、采用多孔壁技术进行实验所建立的关联式良好符合。
王海兴陈熙潘文霞
关键词:湍流射流引射数值模拟
Aerodynamics of indirect thrust measurement by the impulse method被引量:12
2011年
The aerodynamic aspects of indirect thrust measurement by the impulse method have been studied both experimentally and numerically. The underlying basic aerodynamic principle is outlined, the phenomena in subsonic, supersonic and arc-heated jets are explored, and factors affecting the accuracy of the method are studied and discussed. Results show that the impulse method is reliable for indirect thrust measurement if certain basic requirements are met, and a simple guideline for its proper application is given.
Cheng-Kang WuHai-Xing WangXian MengXi ChenWen-Xia Pan
Studies on the Volt-Ampere Characteristics of a Direct-Current,Dual-Jet Plasma Generator
<正>Due to very high energy densities in the arc column and/or jet regions,thermal plasmas could be used as one...
Hao Zhang~a
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Modelling Study on the Plasma Flow and Heat Transfer in a Laminar Arc Plasma Torch Operating at Atmospheric and Reduced Pressure被引量:1
2009年
A modelling study is performed to investigate the characteristics of both plasma flow and heat transfer of a laminar non-transferred arc argon plasma torch operated at atmospheric and reduced pressure. It is found that the calculated flow fields and temperature distributions are quite similar for both cases at a chamber pressure of 1.0 atm and 0.1 atm. A fully developed flow regime could be achieved in the arc constrictor-tube between the cathode and the anode of the plasma torch at 1.0 atm for all the flow rates covered in this study. However the flow field could not reach the fully developed regime at 0.1 atm with a higher flow rate. The arc-root is always attached to the torch anode surface near the upstream end of the anode, i.e. the abruptly expanded part of the torch channel, which is in consistence with experimental observation. The surrounding gas would be entrained from the torch exit into the torch interior due to a comparatively large inner diameter of the anode channel compared to that of the arc constrictor-tube.
王海兴陈熙潘文霞
Modeling of a Laminar DC Arc Plasma Torch Operated at Atmospheric and Reduced Pressure
<正>A DC non-transferred arc plasma torch,which can be operated at atmospheric or sub-atmospheric pressure, has...
Hai-Xing Wang~a
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