On pressure-velocity correlation of steady and oscillating flows in regenerators made of wire screens
On pressure-velocity correlation of steady and oscillating flows in regenerators made of wire screens
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DOI：
10.1115/1.2822010
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发表时间：
1999-03
影响因子：
2
通讯作者：
C. Hsu;Huili Fu;P. Cheng
中科院分区：
文献类型：
--
作者：
C. Hsu;Huili Fu;P. Cheng
建立了一套能够产生定常和振荡流动的实验装置，并对填充金属丝网的蓄热室的压降特性进行了实验研究。为了准确地确定压降与速度的关系，测量了蓄热室的速度和压降，实验范围从很低到很高的雷诺数。定常流动结果表明，除Darcy-Forchheimer两项关联式外，与Re-1/2 h成正比的三项关联式与实验数据符合得最好，这一Re-h 1/2项解释了中间雷诺数的边界层效应。结果还表明，脉动流的关联式与定常流关联式符合1<；Re h<；2000。这表明，回热器内的振荡流动在小于4.0赫兹的频率范围内表现为准稳态，这是该装置可操作的最大振荡流动频率。
A facility capable of generating steady and oscillating flows was constructed and experiments were conducted to investigate the pressure-drop characteristics of regenerators packed with wire screen Both the velocity and pressure-drop across the regenerator were measured, To accurately determine the correlation between pressure-drop and velocity, the experiments covered a wide range from very low to very high Reynolds numbers, Re h . The teady flow results reveal that a three-term correlation with a term proportional to Re -1/2 h in addition to the Darcy-Forchheimer two-term correlation will fit best to the data, This Re - h 1/2 term accounts for the boundary layer effect at intermediate Reynolds number. The results also show that the correlation for oscillating flows coincides with that for steady flows in 1 < Re h < 2000. This suggests that the oscillating flows in the regenerators behave as quasi-steady at the frequency range of less than 4.0 Hz, which is the maximum operable oscillating flow frequency of the facility.