The Phase I effort to provide program and system definition for the HTTT Program includes a task to establish two reference 2600/sup 0/F turbine subsystem designs. Tg pro 2.7.3 verification#The program is to be conducted in three phases: program and system definition (phase I) technology testing and test support studies and technology readiness verification test program (Phase III). The objective of the ERDA-HTTT Program is to bring to Technology Readiness within six years a high-temperature turbine for use in a combined cycle using coal-derived fuel at a firing temperature of 2600/sup 0/F with growth capability to 3000/sup 0/F. The information from the other task studies was integrated into turbine component design and the Technology Development Plan, which includes detailed design and component tests prior to Phase III engine testing. Preliminary materials and process more ยป selections were made based on the anticipated high-temperature, coal-derived fuels environment. The turbine subsystem work was closely related to other tasks, particularly the Materials and Fabrication Process Development and Fuels Cleanup Programs. The results of the analysis and design effort are documented. The preliminary turbine design effort includes analysis of the flow path for both air and water-steam cooling approaches, determination of cooling requirements, and preliminary thermal and mechanical design of critical vane and blade components. Engine and combined cycle performance studies led to a single-shaft engine with an air flow of 754 lb/sec and a pressure ratio of 15:1. The many advantages of this approach and scaling techniques are described in the report. A 0.30 linear scale test turbine was chosen for the Phase III Verification Test Program. The primary and backup concepts complement each other and constitute a combination which maximizes the chance of final program success. The backup concept uses water-cooled vanes and steam-cooled blades in the first two turbine stages. The primary 2600/sup 0/F turbine subsystem concept includes a four-stage turbine, air-cooled by advanced transpiration and impingement/convection cooling techniques. Work carried out by the Westinghouse design team under the Reference Turbine Subsystem Task of the High Temperature Turbine Technology (HTTT) Program is discussed.
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