Research on the application performance of the corrugated structures in gas wave tubes

Abstract

This paper proposes a new corrugated gas wave tube to enhance the energy dissipation effect of a static gas wave refrigerator. The tube was based on enhanced heat transfer theory, and its heat transfer efficiency and flow field under different pressure ratios were analyzed. The results demonstrated that the corrugated structure improved heat transfer efficiency compared with smooth tubes. Furthermore, the study investigated the cooling efficiency of gas wave tubes with the application of the corrugated structure under different conditions. The findings indicated that increasing the corrugation percentage led to a fluctuating increase in cooling efficiency. At a pressure ratio of five, the highest cooling efficiency could be improved by 12.65%. By analyzing the motion state of the shock wave in the tube, the gas Nu number, and the law of motion of the wave system, it was determined that the corrugated structure effectively reduced the intensity of the reflected shock wave and enhanced energy dissipation at the end of the tube, increasing cooling efficiency. The experiment was conducted under consistent working conditions, and the efficiency showed varying increases. After thorough research, it could be concluded that using a 60% corrugated gas wave tube proportion yielded the greatest improvement in cooling efficiency.