关键词: 过气道;旋涡;研究

Abstract: Based on theoretical considerations and primarily on experiment result, it is shown that the performance of a normal supersonic S-shaped belly inlet is sensitive to sideslip and that bulk swirl may occur.Depending on the sensitivity of the engine to swirl disturbances in the absence of inlet guide vanes,the engire performance may deteriorate and serious problem in engine/inlet compatibility such as engine surge and fan vibration may occur.The use of dynamic total pressure distortion as primary compatibility parameter is questionable and it is indicated that for the engine with larger stall margine,swirl should be the key parameter in engine/inlet compatibility.A new way is developed to determine quickly if there is any bulk swirl at inlei exit without measuring swirl.

Key words: Inlet;Swirl;Research