Accession Number : AD0901614

Title :   Feasibility Study for a Practical High Rotor Tip Clearance Turbine.

Descriptive Note : Final rept. 30 Apr 71-29 Feb 72,

Corporate Author : GENERAL ELECTRIC CO CINCINNATI OH AIRCRAFT ENGINE BUSINESS GROUP

Personal Author(s) : Evans, Dennis C. ; Prince, Timothy C.

Report Date : 29 FEB 1972

Pagination or Media Count : 49

Abstract : Turbine tip clearance loss prediction methods were investigated analytically. Vector diagram variations, flow path wall curvature, and stator tangential lean and axial sweep affect the magnitude of this loss for given turbine design requirements and tip clearance. For a model core turbine, a potential 30% reduction in clearance loss relative to an equivalent free vortex turbine is predicted for a practical application of these variations. A follow-on investigation is proposed. (Author)

Descriptors :   *GAS TURBINE BLADES), (*TURBINE BLADES, TOLERANCES(MECHANICS)), (*TURBOFAN ENGINES, GAS TURBINES, AXIAL FLOW TURBINES, AXIAL FLOW TURBINE ROTORS, AERODYNAMIC CONFIGURATIONS, LEAKAGE(FLUID), MEASUREMENT, TEST METHODS, PERFORMANCE(ENGINEERING), MATHEMATICAL PREDICTION, REDUCTION, PRESSURE, PREDICTIONS, NOZZLE GAS FLOW, COMBUSTION CHAMBER GASES, GAS FLOW.

Subject Categories : Fluid Mechanics
      Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE