Accession Number:

AD0683215

Title:

TRANSITION AND COMPRESSOR SYSTEMS OF A CENTRIPETAL-FLOW TURBINE,

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1968-08-01

Pagination or Media Count:

14.0

Abstract:

Operation of a centripetal turbine in the transition and compressor regimes during sharp decreases of flow rate through the turbine is discussed, and experimental characteristics of a turbine operating in these regimes are presented. An approximate equation is derived to find the conditions of sudden transition from turbine to compressor operation. Experimental characteristics in the turbine-compressor transition regions for a centripetal turbine are presented graphically, and the locations of the transition jumps are found to be adequately represented by the derived equation. Transition back to the turbine regime occurs at a different point, thus forming a hysteresis loop for the transition processes. Graphs of the internal power of the turbine show that it absorbs substantial power in the compressor regimes and can thus be used as a brake under these conditions. Increased hysteresis effects are expected for high temperature gas operation tests were made with compressed air. Author

Subject Categories:

  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE