Analysis of the test condition of a shock-expansion tube: JF-16

	Analysis of the test condition of a shock-expansion tube: JF-16
	Hu ZM(胡宗民); Wu B(吴波); Jiang ZL(姜宗林)
会议录名称	Proceedings of the First International Conference on High Temperature Gas Dynamics
	2012-10
会议名称	First International Conference on High Temperature Gas Dynamics
会议日期	2012-10
会议地点	Beijing
摘要	A shock-expansion tube (SET, named JF-16) has been built at the State Key Laboratory of High Temperature Gas Dynamics (LHD) in order to generate relatively steady and clean test gas of really high enthalpy. However, the test time of a SET is extremely shorter as compared to a reflected-shock tunnel (RST) of the same scale which results in difficulties in the measurements and diagnostics. An applicable means to the flow diagnostics is the integrated computation-experiment techniques. In this paper, some numerical issues occurring in our computational investigation for the test flow of JF-16 are discussed. The dispersion-controlled dissipative scheme (DCD) is used to setup our SET simulation code. However, spurious oscillation at the contact surface occurs when the original scheme is applied to the simulation of JF-16 test flow. A new flux splitting algorithm based on local characteristics is worked out for the DCD scheme. Preliminary computations indicate that the updated algorithm is more robust to suppress the aforementioned oscillation as compared to the original algorithm. Several experiments with the typical hypervelocity test flow of JP-16 are computed and compared to validate the algorithms. The computations of double-wedge flows indicate that the experimental visualization is mainly the self-illumination of nitrogen atoms instead of the schlieren image.
关键词	Shock-expansion Tube Computation Spurious Oscillation Flus Splliting
课题组名称	LHD激波与爆轰物理
语种	英语
文献类型	会议论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/47093
专题	高温气体动力学国家重点实验室
推荐引用方式 GB/T 7714	Hu ZM,Wu B,Jiang ZL. Analysis of the test condition of a shock-expansion tube: JF-16[C]Proceedings of the First International Conference on High Temperature Gas Dynamics,2012.

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