In order to acquire the optimal cooling approach of aero-engine chamber

experimental approaches were taken to study the cooling effectiveness of effusion cooling and impingement/effusion cooling.Cooling effectiveness of these two types of cooling configurations were investigated on the same hot/cold air conditions of inlet

such as position of effusion holes

inlet temperature of hot/cool side

mass flow of hot/cool air

pressure drop between hot/cool sides.Infrared camera was used to measure the temperature of effusion cooled surfaces on the side of hot main stream to get the cooling effectiveness

and analyzed the cooling effectiveness of these two cooling configurations.The results show that on the condition of the same opening area and hot/cold air conditions of inlet

double wall cooling gets higher cooling effectiveness than effusion cooling configurations by approximately 30%

owing to the heat transfer enhancement within the gap of the double walls.