A112 環状衝突噴流の流動特性

環状流路幅の影響

抄録

The annular impinging jet is used to enable a uniform cooling over the wide range on the wall surface by the jet flow. The passage width was adjusted by changing the diameter of the inner pipe with fixing the diameter of the outer pipe. The lidded and lidless conditions of the inner pipe were also carried out. The pressure and heat characteristics on the impinging wall were examined under these conditions. As a result, it was found that the optimum conditions for a uniform cooling are about pipe diameter ratio di/do=0.7 and the lidless condition of the inner pipe. It was clarified by the flow visualization that the contraction flow which gathers to the center of pipe causes the loss of the effect of a uniform cooling.