Numerical study on array air jet heat transfer uniformity

The uniformity of multiple air jet impingement heat transfer which is used in the aircraft cooling simulation is numerically studied to guide the design of the thermal simulation equipment and the experiment. A model of cooling simulation is established, and the result shows that SST k-ω turbulence model can be used to simulate the air jet impingement heat transfer. Then the influences of the nozzle number, nozzle height, nozzle diameter and jet velocity on air jet impingement heat transfer are studied and the related reasons are discussed. The optimal match of the parameters has been obtained through the orthogonal test, and the coefficient of variation of the convective heat transfer coefficient h is 0.201. At last, an attempt to improve the uniformity of air jet impingement heat transfer has been made through changing the cross-flow scheme, which proves to be effective, and the coefficient of variation of h can be reduced by 39.7%.