Comparison of oscillating flow characteristics of a metallic and a nonmetallic regenerators at high frequencies

摘要

The oscillating flow characteristics of two regenerators are studied carefully under constant temperature condition in this paper. They are identical in geometrical dimension, but packed with stainless steel wire screens and nylon screens, respectively. The results show that cycle-averaged pressure drop in oscillating flow is 1.2-2 times higher than that in steady flow for a stainless steel regenerator, which is close to experimental results in previous work, while the oscillating flow pressure drop in a nylon wire screen regenerator is larger than that in a stainless steel regenerator at the same mass flow rate, which is three to five times higher than that in steady flow.