On Pressure-Velocity Correlation of Steady and Oscillating Flows in Regenerators Made of Wire Screens

[+] Author and Article Information
Chin-Tsau Hsu, Huili Fu, Ping Cheng

Department of Mechanical Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong

J. Fluids Eng 121(1), 52-56 (Mar 01, 1999) (5 pages) doi:10.1115/1.2822010 History: Received September 03, 1997; Revised June 11, 1998; Online December 04, 2007


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 screens. 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, Reh . The steady flow results reveal that a three-term correlation with a term proportional to Reh −1/2 in addition to the Darcy-Forchheimer two-term correlation will fit best to the data. This Reh −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 < Reh < 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.

Copyright © 1999 by The American Society of Mechanical Engineers
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