Numeration analysis was made to simulate the influence induced by upstream jet on downstream jets in impingement chamber.The results shows that

(1) As the cross-flow increases

the heat transfer efficiency on the impinged surface changes in a very complicated way.(2) Cross-flow influences the heat transfer of the impinged surface mainly in two aspects:as the cross-flow Reynolds number increases

the strength of stretched vortex pair downstream of the jet firstly increases and then decreases

resulting in the same influence on the heat transfer of the target surface;the deviation of the impinging jet induced by cross-flow makes the high heat transfer zone move backward. (3) As cross-flow increases

the heat transfer efficiency induced by impingement and cross-flow changes

making the heat transfer on the target surface more complicated.