Accession Number : AD0716505

Title :   Theory of the Staggered Diffuser,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Vasilev,Yu. N.

Report Date : 14 OCT 1970

Pagination or Media Count : 27

Abstract : In order to check the flow of a liquid or gas moving at subsonic velocity, diffusers with constantly increasing (in the direction of the output) cross-sections are usually employed. Most frequently, diffusers are of conical design with opening angle of 8-10 degrees. In such devices pressure drop is mainly due to friction with the walls. In certain cases, however, the use of a diffuser of this design is impossible for one reason or another, and retardation of the flow must be achieved by a sudden increase in cross-sectional area. In such cases the jet is diverted from the walls and from the butt end of the channel which joins the tube, and in this way a stagnant region appears. Flow in such diffusers is characterized by intensive eddies, which result from great pressure drops. The paper is devoted to a type of staggered diffuser in which the flow encounters several 'sudden' increases in cross-section. (Author)

Descriptors :   (*DIFFUSERS, TURBULENCE), SUBSONIC CHARACTERISTICS, JETS, DESIGN, STAGNATION POINT, PRESSURE, USSR

Subject Categories : Aerodynamics
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE