Abstract:

A dynamic experimental apparatus is designed to investigate oscillat ing flow characteristics of the regenerators under high frequency conditions. Oscillating flow characterist ics of two regenerators, are studied carefully under constant temperature conditions in the paper. They are identical in the geometrical dimension,packed with the stainless steel wire screens and the Nylon screens, respect ively. The results show that the cycleaveraged pressure drop in an oscillat ing flow for a stainless steel regenerator is 112～2 times higher than that in a steady flow, which is close to the experimental results in previous work. While the oscillat ing flow cycle-averaged pressure drop for a Nylon wire screen regenerator is larger than that for a stainless steel regenerator, which is 3 to 5 times higher than that in a steady flow. The results are useful for predicting the pressure drop characteristics of anonmetallic regenerator subjected to a periodically reversing flow with a high operating frequency.

Key words: metal, non-metal, regenerator, oscillating flow, flow characteristics, comparison