Experimental Study of Friction Characteristic in Circular Pipe subject to Low Frequency Pulsating Turbulent Flow
Friction characteristics subject to low frequency pulsating flow in a circular pipe are studied experimentally. The experiments are carried out for different pulsation frequencies, amplitudes and cycle-average Reynolds numbers. The results shows that when the flow rate fluctuates in sine law with time, the pressure drop fluctuates with the same frequency, however, there is a phase difference between the two, and it changes with the cycle-average Reynolds number but have no variation with amplitude and period. During the acceleration phase of the half cycle a laminar-like flow appears that the friction factor changes linear with the Reynolds number. In addition, an empirical equation for the cycle-average friction factor incorporating the effect of pulsation frequency, amplitude and cycle-average Reynolds number is obtained.
Friction Characteristic Low Frequency Pulsating Turbulent Flow Circular Pipe
WANG Chang GAO Puzhen
College of Nuclear Science and Technology, Harbin Engineering University No 145, Nantong Street, Harbin, Heilongjiang, P. R. China
国际会议
上海
英文
939-949
2010-10-10（万方平台首次上网日期，不代表论文的发表时间）