The Frequency Detecting of Gas-Liquid Two-Phase Vortex Street Based on Pressure-Difference Fluctuation Signal
The pressure-difference fluctuation method was used to measure the characteristics of the vortex streets shedding from the cylinder when gas-liquid two-phase fluid flows across it vertically in the rectangle duct. The pressure-difference fluctuation signals caused by the vortex shedding were measured in the gas-liquid two-phase flows, and the vortex shedding PSD characteristics were got through the DFT transformation, under the condition of which the section void fraction is from 0 to 0.15 and Reynolds number scope is from 1.1×104 to 2.8×104. The results showed that: within the experimental condition, the vortex shedding intensity will be weakened in two sides of the cylinder with the void fraction increasing; at α reaching 0.1 ，the obvious wave peak has disappear in the PSD profile ，and the random fluctuation appears; the Reynolds number affects slightly to the power spectrum characteristics.
gas-liquid two-phase cross flow pressure-difference fluctuation signal PSD characteristics
HONG Wenpeng ZHOU Yunlong XU Chi
Dept.of Power Engineering, North China Electric Power University, Baoding, 071003, china School of Energy and Mechanical Engineering ,Northeast Dianli University, Jilin 132012, China
国际会议
北京
英文
2007-08-05（万方平台首次上网日期，不代表论文的发表时间）