MEASUREMENT OF REYNOLDS STRESS IN BUBBLY FLOW USING ULTRASONIC DOPPLER METHOD
作者： Hiroshige Kikura , Masanori Aritomi , Hideki Murakawa
DOI:
关键词: Classical mechanics 、 Porosity 、 Flow (psychology) 、 Physics 、 Ultrasonic sensor 、 Reynolds stress 、 Mechanics 、 Ultrasonic doppler 、 Contact angle
摘要: Microscopic structure in bubbly flows is a topic of interest the study fluid flows. In present paper, Ultrasonic Doppler Method was applied to measurement from which Reynolds stress profiles were obtained. Experiments carried out for an air-water dispersed flow 20mm x 100 mm vertical rectangular channel having void fraction smaller than 3%. Two ultrasonic transducers set on outer surface test section with contact angle 45° off vertical, one facing upward and other downward. By applying statistical methods two directional velocity profiles, calculated. comparing that single-phase flow, it found varied amount bubbles flow. Peak values near wall increased. This tendency more pronounced as
isud-conference.org 参考文章(8)
S.K. Wang, S.J. Lee, O.C. Jones, R.T. Lahey, 3-D turbulence structure and phase distribution measurements in bubbly two-phase flows International Journal of Multiphase Flow. ,vol. 13, pp. 327- 343 ,(1987) , 10.1016/0301-9322(87)90052-8
Akimi Serizawa, Isao Kataoka, Itaru Michiyoshi, Turbulence structure of air-water bubbly flow—II. local properties International Journal of Multiphase Flow. ,vol. 2, pp. 235- 246 ,(1975) , 10.1016/0301-9322(75)90012-9
F. Durst, H. Kikura, I. Lekakis, J. Jovanović, Q. Ye, Wall shear stress determination from near-wall mean velocity data in turbulent pipe and channel flows Experiments in Fluids. ,vol. 20, pp. 417- 428 ,(1996) , 10.1007/BF00189380
C. Tropea, A note concerning the use of a one-component LDA to measure shear stress terms Experiments in Fluids. ,vol. 1, pp. 209- 210 ,(1983) , 10.1007/BF00266470
Yumiko Suzuki, Masamichi Nakagawa, Masanori Aritomi, Hideki Murakawa, Hiroshige Kikura, Michitsugu Mori, Microstructure of the flow field around a bubble in counter-current bubbly flow Experimental Thermal and Fluid Science. ,vol. 26, pp. 221- 227 ,(2002) , 10.1016/S0894-1777(02)00130-9
H. Kikura, M. Aritomi, T. Taishi, Effect of the measurement volume in turbulent pipe flow measurement by the ultrasonic velocity profile method (mean velocity profile and Reynolds stress measurement) Experiments in Fluids. ,vol. 32, pp. 188- 196 ,(2002) , 10.1007/S003480100299
Itaru Michiyoshi, Akimi Serizawa, Turbulence in two-phase bubbly flow Nuclear Engineering and Design. ,vol. 95, pp. 253- 267 ,(1986) , 10.1016/0029-5493(86)90052-X
T. Wei, W. W. Willmarth, REYNOLDS-NUMBER EFFECTS ON THE STRUCTURE OF A TURBULENT CHANNEL FLOW Journal of Fluid Mechanics. ,vol. 204, pp. 57- 95 ,(1989) , 10.1017/S0022112089001667