High-Temperature-Turbine-Technology Program. Phase II. Technology Test and Support Studies. Topical Report. Turbine Spool Technology Rig Design, Fabrication and Initial Test

摘要

This report presents the work performed during the period from 1 August 1977 through 31 December 1980 to design, fabricate and test in full scale a new single-stage, high work transpiration air-cooled turbine. The turbine component was conceived and designed as the HP turbine of a two-spool, 17:1 pressure ratio gas turbine capable of operating at 3000 exp 0 F inlet temperature. The rotating test vehicle for the new turbine component was a modification of an existing CW6515 engine designated the Turbine Spool Technology Rig (TSTR). Extensive design modifications were made to the basic CW6515 engine. These include, in addition to the new turbine component, a completely new high heat release combustor for operation on distillate fuel, provision for controlled variable bleed of up to 20% of compressor air, turbine component cooling air extraction at the compressor exit, a completely new exhaust section and structural changes to support the new turbine. Prior to operating the TSTR, component test programs were conducted on a 60 exp 0 sector of the new annular combustor and a 10-vane cascade to determine characteristics of these components and to develop changes as required to assure satisfactory operation of the TSTR. Subsequent operation of the TSTR as a gas generator was accomplished with no significant problems. The mechanical integrity of a new transpiration air-cooled turbine component and the aerothermal capability of the high temperature turbine blading were demonstrated at turbine inlet temperatures up to 2650 exp 0 F. In addition, the performance characteristics of the new turbine component were established. A turbine efficiency of 85% was indicated. Starting characteristics as well as compressor-turbine thrust balance features were determined and found to compare favorably with predictions. All testing was conducted using clean distillate fuel. (ERA citation 07:059460)