Accession Number : ADA190622

Title :   Effect of a Shear Layer on the Stability of an Axisymmetric External Compression Air Intake,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OH

Personal Author(s) : Kunyuan, Zhang ; Shaozhi, Yu ; Chenyi, Peng

PDF Url : ADA190622

Report Date : 21 Oct 1985

Pagination or Media Count : 13

Abstract : This paper presents the effect of six shear layers with strength ranging from 5-11% entering the lip in various positions on the stability of a variable center cone external compression air intake under the condition of a M 1.72 incident stream. It was experimentally proven that a shear layer below 10% in strength entering the axisymmetric intake near the lip did not cause boundary layer preparation inside the intake cowl. A shear layer up to 11% in strength could enter the intake duct in any position at its entrance without causing buzz. The literature shows a shear layer with 6 to 7% strength can lead to a buzz in a two-dimensional air intake. Thereby, it was demonstrated that an axisymmetric intake duct has a higher resistance to buzz caused by the shear layer.

Descriptors :   *AIR INTAKES, *DUCT INLETS, *LAYERS, *SHEAR PROPERTIES, AXISYMMETRIC, BOUNDARY LAYER, CHINESE LANGUAGE, PREPARATION, RESISTANCE, TRANSLATIONS, TWO DIMENSIONAL

Subject Categories : Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE