DESIGN AND EVALUATION OF A HIGH TEMPERATURE RADIAL TURBINE.
Quarterly technical progress rept. no. 3, 1 Feb-30 Apr 68,
PRATT AND WHITNEY AIRCRAFT WEST PALM BEACH FLA FLORIDA RESEARCH AND DEVELOPMENT CENTER
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The objective of the contract is to develop a technology for high temperature radial turbines to a level that will permit a potential small-engine-manufacturer to make a choice between the radial and the axial turbine. The double-pass rotor design was adopted as the preferred rotor configuration for the turbine. Aerodynamic refinement of the turbine continued. Aerodynamic analysis of the cold flow rotors was completed, and the analytical conclusions drawn from these analyses were confirmed by cold flow tests, which are now 80 complete. Water rig testing was completed, and results indicated the type of losses associated with tip ejection of the rotor cooling air. Steady-state heat transfer analyses were completed, and transient heat transfer studies are now in progress. Metallurgical testing of the rotor specimens is now 80 complete observed tensile properties are satisfactory, but creep-rupture properties continue to be low. Author
- Jet and Gas Turbine Engines