Research on the mechanics of underwater supersonic gas jets

doi:10.1007/s11433-010-0150-x

IMECH-IR > 非线性力学国家重点实验室

	Research on the mechanics of underwater supersonic gas jets
	Shi HH(施红辉); Wang BY(王伯懿); Dai ZQ; Shi HH
发表期刊	Science China-Physics Mechanics & Astronomy
	2010
卷号	53 期号:3 页码:527-535
ISSN	1674-7348
摘要	An experimental research was carried out to study the fluid mechanics of underwater supersonic gas jets. High pressure air was injected into a water tank through converging-diverging nozzles (Laval nozzles). The jets were operated at different conditions of over-, full-and under-expansions. The jet sequences were visualized using a CCD camera. It was found that the injection of supersonic air jets into water is always accompanied by strong flow oscillation, which is related to the phenomenon of shock waves feedback in the gas phase. The shock wave feedback is different from the acoustic feedback when a supersonic gas jet discharges into open air, which causes screech tone. It is a process that the shock waves enclosed in the gas pocket induce a periodic pressure with large amplitude variation in the gas jet. Consequently, the periodic pressure causes the jet oscillation including the large amplitude expansion. Detailed pressure measurements were also conducted to verify the shock wave feedback phenomenon. Three kinds of measuring methods were used, i.e., pressure probe submerged in water, pressure measurements from the side and front walls of the nozzle devices respectively. The results measured by these methods are in a good agreement. They show that every oscillation of the jets causes a sudden increase of pressure and the average frequency of the shock wave feedback is about 5-10 Hz.
DOI	10.1007/s11433-010-0150-x
URL	查看原文
收录类别	SCI
语种	英语
WOS记录号	WOS:000276661700028
关键词[WOS]	INJECTION ; LIQUID ; INSTABILITY ; WATER ; CAVITATION ; PRESSURE ; NOZZLE ; MODEL ; WEAR ; WAVE
WOS研究方向	Physics
WOS类目	Physics, Multidisciplinary
项目资助者	National Natural Science Foundation of China [10672144] ; Natural Science Foundation of Zhejiang Province of China [Y107073] ; Chinese Academy of Sciences ; Zhejiang Province of China
引用统计	被引频次：43[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/43521
专题	非线性力学国家重点实验室
通讯作者	Shi HH
推荐引用方式 GB/T 7714	Shi HH,Wang BY,Dai ZQ,et al. Research on the mechanics of underwater supersonic gas jets[J]. Science China-Physics Mechanics & Astronomy,2010,53,3,:527-535.
APA	施红辉,王伯懿,Dai ZQ,&Shi HH.(2010).Research on the mechanics of underwater supersonic gas jets.Science China-Physics Mechanics & Astronomy,53(3),527-535.
MLA	施红辉,et al."Research on the mechanics of underwater supersonic gas jets".Science China-Physics Mechanics & Astronomy 53.3(2010):527-535.

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