The Heat Transfer And Strength Analysis Of The Thread Corrugated Tube

In recent years, the heat transfer enhancement technology develops rapidly since the energy crisis. In this paper, a new type of enhancement heat transfer tube called thread corrugated tube has been invented. This tube combined the characteristics of both the corrugated tube and the internal thread tube. The heat transfer and intensity characteristic of the thread corrugated tube was investigated numerically. The main contents of this paper can be listed as follows.(1) The conception of thread corrugated tube came from the corrugated tube and the internal thread tube. This kind of heat transfer tube could be obtained by manufacturing thread on the straight section interface of the corrugated tube.(2) The FLUENT software was used to simulate the heat transfer performance of the thread corrugated tube and the corrugated tube. The results show that the tube inside heat transfer coefficient of the thread corrugated tube is1.1times larger than the corrugated tube. According to the simulation results of different tubes with different depth of thread, the tube with1mm depth of thread has more obvious enhancement of heat transfer than the one with0.5mm depth.(3) The intensity simulation of the tubes with different depth of thread shows that the intensity of tube with0.5mm depth of thread is between the corrugated tube and the tube with1mm depth. Considering the heat transfer performance of tubes with different depth of thread, the thread corrugated tube which has lower depth of thread has a better over-all property.(4) The manufacturing method of the thread corrugated tube was also been investigated. Two methods have been proposed, which can provide a reference for the manufacturing process of the tube.