Accession Number : AD0693656

Title :   EFFECT OF NONUNIFORMITY OF INCIDENT FLOW ON THE CHARACTERISTICS OF THE STAGES OF A COMPRESSOR WITH BLADES WITH A SMALL ASPECT RATIO,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Polyakov,A. E.

Report Date : 30 JAN 1969

Pagination or Media Count : 8

Abstract : The experimental results are presented of a study of the effect of nonuniformity of the velocity field on compressor rotor and stage characteristics. The experiments were performed on a single-stage compressor with an external diameter ratio and a rotor hub-tip ratio, with a peripheral blade tip velocity of U equals 153 m/sec. The Reynolds number was approximately 3.5.10(superscript 5). The main tests were conducted on blades. The nonuniformity of the velocity fields was produced by reducing the flow velocity with concentric rings made of 0.6 mm wire, mounted at the hub and near the inlet periphery cross-section. Velocity diagrams used in determining stage characteristics are shown. An increase in the flow nonuniformity at the periphery results in a substantial reduction of the efficiency and pressure of the investigated rotor. If the nonuniformity extends along the blade height, the rotor characteristics deteriorate. (Author)

Descriptors :   (*AXIAL FLOW COMPRESSOR BLADES, FLOW FIELDS), AXIAL FLOW COMPRESSORS, REYNOLDS NUMBER, VELOCITY, DETERIORATION, USSR

Subject Categories : Hydraulic and Pneumatic Equipment
      Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE