Numerical Simulation Of Flow And Heat Transfer Of Shell-and-side In A Double Segmental Bafflies Of Shell-and-tube Heat Exchanger

With increasing deepening of our country on the road to industrialization,accompanied by environmental problems have become increasingly prominent,heat exchanger that to be an important industrial equipment have been more and more by people's attention.Through on the Numerical Simulation of Shell-side Fluid-flow in the Shell-and-tube Heat Exchanger,we can get very clear results,that can guide us transformate and optimizate heat exchanger,and improve the heat transfer rate.This simulated by SolidWorks and Gambit establish three-dimensional model,and establish mesh by ICEM;is simulated,to which standard k-?model?wall functions and SIMPLE are applied.The results show that the larger baffle cut,the wider fluid detention areas which are caused in front of baffles and back,and pressure drop of the models whose tubes are arrayed by regular triangle is biggest.In a similar way,the models with double segment and disco and doughnut baffles are simulated.It shows that dead flow angles are well eliminated in the shell side because of the usage of two kinds of baffles,and pressure drop of the models whose tubes are arrayed by regular triangle is also biggest.For double segmental bafflies of shell-and-tube heat exchanger,A plate for heat exchanger for heat effect than B plate less,but the pressure drop is than B plate for heat exchanger.By compared with single and double segmental baffles heat exchanger in the same condition and change a structure parameters can be drawn that single segmental baffle heat exchanger than double bow for heat transfer effect is better,but the pressure drop is more obvious.Through the comparison of double arched tube shell type heat exchanger in different structural parameters simulation results were analyzed let us baffle plate spacing,size of the gap,in-depth understanding of the parameters of the heat exchanger shell for effect of heat and pressure drop generated by the impact.Can also be selected according to the actual operating conditions of the structure of the gap height and the combination of baffle plate spacing.In the future,the experimental study has been done in a very good way,saving a lot of time and cost,and come to the results of the guiding significance.