Numerical Simulation of the Effect of Hot end Tube Length on Refrigeration Effect
In order to verify that there is an optimal hot end tube length in the design of eddy current tubes,a physical model was established,the ideal gas and air were used as the calculation working fluid,the k-ε turbulence model of RNG was adopted,when the inlet temperature was 300 K,the inlet pressure was 0.3 MPa,and the length of the hot end tube changed in the range of 60～200 mm,the influence of the hot end tube length of the eddy current tube on the energy separation effect of the vortex tube was numerically simulated,and the influence of the change of the temperature field distribution,velocity field distribution and pressure field distribution of the tube length at the cold core and near the pipe wall was analyzed.The results show that with the increase of the length of the hot end tube,the refrigeration temperature effect increases first and then decreases,and the refrigeration effect is the best when the length of the hot end tube is 120 mm.
numerical simulationhot end tube lengthflow field distributionenergy separation
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