CFD analysis of GM pulse tube with functional gradient regenerator

Abstract

The present research aims to establish a stable and reliable simulation of GM pulse tube using commercially available CFD software. In line with aforementioned objective, three major tasks have been addressed in detail. First, a GM pulse tube has been taken from the literature for analysis. Unlike the present state of the art, the present analysis has been carried out using multi-component models in 3D environment. Various components involved in a pulse tube have been modelled, and the corresponding assembly model has been analysed. The proposed approach introduces tremendous amount of numerical complexities which have been addressed in detail. The numerical result agrees to lowest temperature achieved experimentally with 95% accuracy. In second, the thermoacoustic phenomena have been analysed regarding work done at various locations, which re-establishes the fact and phenomena which takes place in a double inlet GM pulse tube. At last, functionally gradient regenerator (FGR) has been proposed to enhance the performance of pulse tube. This particular task has two major sections. The first section enlightens the modelling of functionally gradient porous material (FGPM) for analysis, and the second section focuses on the realistic modelling from manufacturing point of view. Summarizing, the contribution establishes a practice to investigate a GM pulse tube in 3D component level together with an approach to the model functionally gradient regenerator.