Comparison between numerically modeled and experimentally measured wave-rotor loss mechanisms

Abstract

A numerical model has been developed that is capable of predicting the performance of a wave-rotor (pressure exchanger) of specified geometry over a wide range of operating conditions. The model can account for the major loss mechanisms of leakage from the tube ends, fluid viscosity, heat transfer to the tube walls, finite tube opening time, shock waves, and nonuniform port flows. It is a one-dimensional flow model that follows a single tube as it rotates past the various stationary ports. Since the model is relatively simple (i.e., one dimensional), it uses little computer time. This makes it suitable for design as well as analytical purposes. This article will present a brief description of the model and then discuss a comparison between the model predictions and several wave-rotor experiments.