Finite Element Method Simulation And Experimental Research On Spirally Grooved Tube Roll-Pressing Process

Nowadays, enhanced heat transfer utilizes superior heat transfer elements. Spirally grooved tube is one of them. It is a high-effective special shape tube for enhanced heat transfer, it remarkably increases heat transfer coefficient of inner and outer wall in the course of phases and no phases, and acts on bilateral enhanced heat transfer.This paper makes reference to much relevant information and analyzes different technique of machining, and finally adopts roll-pressing to process spirally grooved tube. Main parameters of spirally grooved tube have diameter of tube, wall thickness, corrugation depth and fin pitch. Abstractly, using ANSYS software simulates roll-pressing course of spirally grooved tube by three-dimension numerical simulation and experimental research.Firstly, roll-pressing course of spirally grooved tube is simulated by kinds of shape tools (sphere and triangle with arc) so as to obtain the distribution of stress, strain, the states of metal flow, the deformation of corrugation and the value of roll-pressing force. Therefore, they are considered to analyze influence to roll-pressing force and deformation of wall thickness by using shapes tools and parameters.Secondly, results of numerical simulation and experimental results are compared to validate reliability of numerical simulation. They are considered as better basis of further studies on roll-pressing process of spirally grooved tube by FEM method, and they can offer important theoretic dates for productionThirdly, relation between roll-pressing force and corrugation depth is obtained to offer guidance for secondary machining.Lastly, experiment on various spirally grooved tube is made to obtain relationship between diverse parameters and performance of heat exchanger. It is a convective heat transfer experiment without phases. Medium is water.