关键词: 进气道;旋涡;流场;匹配;相容性;评价方法

Abstract: Inlet Swirl is a major disturbance paramenter in engine/inlet compatibility.Its effects should not be ignored.The procedure for assessment of engine/S-shapedinlet compatibility is discussed, and a criterion for its validity is suggested.The criterionfor engine /S-shaped-inlet compatibility must consist of two parts,one is related withpressure distortion and another with flow angularity.

Key words: Inlet;Swirl;Flow field;Matching;Compatibility;Assessment method