The Performance Study And The Parameters Optimization Of Vortex Tube

The vortex tube, which can be used to divide compressed gas flow into a hot and a cool gasflow, with advantages of simple structure and steady work condition etc, has a widely appliedforeground in the Nature gas process. A lot of studies have been done to find out the principleof the energy separation in the vortex tube up to now. Recently, with the rapid development ofthe computational fluid dynamics method, it is used as a new measure to investigate thecomplex vortex flow in the vortex tube. However, various problems in simulation have notbeen worked out, such as finding out the turbulent model which is the most suitable for thesimulation of the vortex tube, lack of systematic contrastive analysis. Besides, the LES modelwhich is fit for the vortex simulation is hardly used in the present literatures, and the influenceof parameters on the performance of the vortex tube have scarcely studied in the past.The purpose of this study is to find out the turbulent model which is most suitable for thesimulation of the vortex tube and the influence of parameters on the performance of the vortexby combining numerical simulation and experimental research together, and lay a foundationfor the further study.Firstly, a 3-D simulation model is set up. RNG k-ε, Realizable k-ε, RSM and LES areused respectively to simulate the vortex tube for the first time, with which the flow field,temperature and pressure distribution are obtained. By comparing the simulation results, amost suitable model for the simulation of the vortex tube is gained.Secondly, founded on the above simulation study, a series of results of optimize parametersare gained by performing the optimize analysis, which are also compared with the resultsfrom literature.Finally, an experimental system is set up to get the influence of parameters on theperformance of the vortex tube. As a result, the influential trend and optimize value are foundout, the extent of the influence is also analyzed, and the difference between the experimentaland simulation results are analyzed.