Investigation of Heat Transfer Inside Inclined Multihole in the Impingement/Inclined Multihole Double Wall

The local and overall heat transfer inside inclined multihole has been investigated experimentally with two types of hole distributions and different locations in the impingement/inclined multihole double wall of aeroengine combustor liner under the guidance of similarity method.The results demonstrated that the heat transfer near the entrance was enhanced greatly with the local heat transfer coefficients,and the average heat transfer coefficients were related closely with the impingement.The heat transfer coefficients vary greatly in the region of entrance due to the influence of impingement.The influencial area can reach down to some where X/D being equal to 3 0,but vary little in the region far from the entrance.