Computational Investigation for Flow and Heat Transfer Characteristics of Automobile Windshield with Impinging Slot Jets

A computational study is reported on flow and heat transfer from single row of slot air jets impinging on an automobile windshield surface. The effects of jet-to-jet spacing and jet exit to windshield spacing are computationally analyzed for a three values of Reynolds number. There is a significant variation in pressure and heat transfer along the stagnation zone and the entire windshield surface for all the configurations tested. It is observed that the average heat transfer in the stagnation zone reduces by about 9 % when c/d is increased from 2 to 4. However the average heat transfer for the entire windshield increases with c/d as well as h/d. The maximum increase is average heat transfer for the entire windshield is found to be 33% for the case with c/d=4, h/d=5.6 than that of the case with c/d=2, h/d=3.6.