A three-dimensional numerical simulation of an integrated deflector under periodical impingement of a supersonic high-temperature air jet was conducted on the basis of the Renormalized Group (RNG) k-epsilon model. The heat capacity and thermal conductivity of the deflector materials as functions of temperature were measured to establish the model. The predicted transient temperature response of the impinged and back surfaces of the deflector agreed well with experimental data. The flow and thermal performance of jet impinging on the deflector were investigated, and the effects of separation distance, horizontal angle, and vertical angle were analyzed. The predicted results of the experimental case revealed that the impingement jet generated a shock wave at the plate center and an expansion wave at 0.5D

Keywords:Integrated deflector;Supersonic jet impingement;Numerical simulation;Flow guiding performance;Maximum point displacement