Effects of surface roughness on self-excited cavitating water jet intensity in the organ-pipe nozzle: Numerical simulations and experimental results

doi:10.1142/S021798491950324X

	Effects of surface roughness on self-excited cavitating water jet intensity in the organ-pipe nozzle: Numerical simulations and experimental results
	Han, Xiangdong 1,2,3,4,5; Kang, Yong 1,2,5; Li, Deng 1,2,5; Zhao, Weiguo 6
刊名	MODERN PHYSICS LETTERS B
	2019-09-30
卷号	33 期号:27
关键词	Surface roughness pressure turbulent kinetic energy intensity vapor volume fraction vortices self-excited cavitating water jet
ISSN号	0217-9849
DOI	10.1142/S021798491950324X
英文摘要	This study was conducted to investigate effects of surface roughness on self-excited cavitating water jet intensity in an organ-pipe nozzle. Roughness average (Ra) values are 0.8, 1.6, 3.2, 6.3, 12.5, and 25 mu m, respectively. Numerical simulation results indicate that at inlet pressure of 10 MPa, the maximum, minimum, and real-time pressures in the self-excited oscillation chamber reach their respective peak values. The turbulent kinetic energy intensity in the external flow region is also most intense at this point, the vapor volume fraction in orifice is the highest, the vortex distribution scope in the orifice is the largest under Ra = 12.5 mu m, and the self-excited cavitating water jet intensity is the strongest. The opposite variations emerge at Ra = 25 mu m compared to those of Ra = 12.5 mu m, where the intensity is weakest. Pressure varies only slightly as Ra varies from 0.8 mu m to 6.3 mu m. Turbulent kinetic energy intensity behaves similarly as Ra increases from 0.8 mu m to 3.2 mu m. At Ra = 6.3 mu m, it was weaker than at Ra = 0.8-3.2 mu m. Similarly, there are only slight differences in vapor volume fraction and vortex distribution scope with Ra from 0.8 mu m to 6.3 mu m. The intensities at Ra = 0.8-3.2 mu m are similar, and weaker at Ra = 6.3 mu m. Pressure values are maximal at inlet pressure of 20 MPa, turbulent kinetic energy intensity is most intense, vapor volume fraction is highest, vortex distribution scope is largest under Ra = 6.3 mu m, and intensity is strongest. Distinctions among pressure, turbulent kinetic energy intensity, vapor volume fraction, and vortex distribution scope values with Ra from 0.8 mu m to 3.2 mu m are slight. Differences in the corresponding intensities are also slight; all decrease with Ra from 12.5 mu m to 25 mu m as the intensity gradually weakens. Numerical simulation results were validated by comparison against corresponding experimental phenomena.
资助项目	Hubei Provincial Natural Science Foundation of China[2016CFA088]
WOS研究方向	Physics
语种	英语
出版者	WORLD SCIENTIFIC PUBL CO PTE LTD
WOS记录号	WOS:000488855600001
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/31555]
专题	能源与动力工程学院
通讯作者	Kang, Yong
作者单位	1.Wuhan Univ, Sch Power & Mech Engn, Wuhan 430072, Hubei, Peoples R China 2.Wuhan Univ, Minist Educ, Key Lab Hydraul Machinery Transients, Wuhan 430072, Hubei, Peoples R China 3.Natl Univ Singapore, Dept Mech Engn, Singapore 117576, Singapore 4.Natl Univ Singapore, Temasek Labs, Singapore 117411, Singapore 5.Wuhan Univ, Hubei Key Lab Waterjet Theory & New Technol, Wuhan 430072, Hubei, Peoples R China 6.Lanzhou Univ Technol, Key Lab Fluid Machinery & Syst, Lanzhou 730050, Gansu, Peoples R China
推荐引用方式 GB/T 7714	Han, Xiangdong,Kang, Yong,Li, Deng,et al. Effects of surface roughness on self-excited cavitating water jet intensity in the organ-pipe nozzle: Numerical simulations and experimental results[J]. MODERN PHYSICS LETTERS B,2019,33(27).
APA	Han, Xiangdong,Kang, Yong,Li, Deng,&Zhao, Weiguo.(2019).Effects of surface roughness on self-excited cavitating water jet intensity in the organ-pipe nozzle: Numerical simulations and experimental results.MODERN PHYSICS LETTERS B,33(27).
MLA	Han, Xiangdong,et al."Effects of surface roughness on self-excited cavitating water jet intensity in the organ-pipe nozzle: Numerical simulations and experimental results".MODERN PHYSICS LETTERS B 33.27(2019).