结构参数对自激脉冲射流特性影响的统计分析

doi:10.3969/j.issn.1674-8530.16.0063

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Abstract In order to obtaine the optimal ratio of the nozzle structure parameters of the underwater self-excited suction pulsed jet, taking the self-developed self-excited suction jet nozzle as study object, based on the theory of the mathematical statistics, the mean square error, pulsating pressure peak and time-averaged pressure from the pulsating pressure test data of underwater self-excited suction pulsed jet with the change of nozzle area ratio, cavity ratio and cavity length ratio were analyzed. The optimal ratio of the nozzle structure parameters of the underwater self-excited suction pulsed jet was obtained. When the confining pressure is less than 0.4 MPa, the upper and lower nozzle area ratio range is 1.96-4.84, the optimal range is 1.96-4.00. When the confining pressure is less than or equal to 0.2 MPa, the cavity length is 2.8-4.4, the optimal value is 3.4, the cavity length ratio is 1.50-1.65 or 2.20-2.30, and the optimal range should be 1.50-1.65.

Key words： pulsed jet mozzle structural parameters underwater impact characteristics self-excited suction statistical characteristics

Received: 18 August 2017

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	GAO Chuan-Chang-
	HU Yi-Wei-^*
	LI Huan-
	MA Wen-Liang-

Cite this article:

GAO Chuan-Chang-,HU Yi-Wei-^*,LI Huan-等. Statistical analysis of pressure characteristics of underwater self-excited pulse jet[J]. Journal of Drainage and Irrigation Machinery Engin, 2018, 36(4): 327-333.

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http://zzs.ujs.edu.cn/pgjx/EN/10.3969/j.issn.1674-8530.16.0063 OR http://zzs.ujs.edu.cn/pgjx/EN/Y2018/V36/I4/327

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