Numerical Simulation And Research On The Plat Of Pre-stressed Heat Exchanger

The shell-and-tube heat exchanger is widely used because of its simple structure, long using experience, mature designing and processing craft, large handling capacity, strong compatibility as well as safty and reliability and so on. The rod-baffle heat exchanger are becoming the most universal one in traditional hell-and-tube heat exchangers because of its merit of simple structure, high-heat and high-pressure valve, good anti-vibration performance of the fluid.The pre-stressed technology has good prospect in development and application for it may greatly reduce the thermal stress of fixed tube-sheet exchanger. Under the instruction of patent"The Design and Manufacture Method on Shell and Tube Pre-Stressed Heat Exchanger", do more research at the rod-baffle pre-stressed heat exchanger. And deeply study about the calculation method of tube plate performance through simulation. The prime task includes several aspects as follows:1. First do corresponding setting in the FLUENT software, and using its increased temperature of exit in the entrance part in the shell side as a heat exchanger coupled numerical simulation of fluid criterion is discussed when the grid should get the grid independent solution by size2. Study FLUENT parallel computing efficiency, and improve the grid number that a single case can be calculated by the use of parallel computing technology and decreases the number of part in the heat exchanger.3. Using the new method of section Interpolation, whole modeling and sub-network in ANSYS, so the ANSYS finite element model of heat exchanger is no longer needed the corresponding FLUENT simulation segment, the model is simplified. ANSYS model as a whole, when the length of heat exchanger tube sheet on the PC and the impact of improved versatility APDL command stream.4. The temperature field of FLUENT model will be converted to ANSYS model and do the thermal analysis and structural analysis. And compare with the existing experimental data of the laboratory comparison.5. While the other condition remain the same ,change the fluid temperature of tube side and analyze the performance of heat exchanger .6. While the other condition remain the same, change tube length and diameter of the plate and analyze the performance of heat exchanger .Through this study, not only enrich the existing theories and PC technology, promote the use of prestressed heat exchanger to lay a solid foundation.