Accession Number : ADA096113


Title :   Regenerative Engine Analysis Program (REAP).


Descriptive Note : Final rept. Oct 79-May 80,


Corporate Author : AIRESEARCH MFG CO OF ARIZONA PHOENIX


Personal Author(s) : Heldenbrand,R W ; Miller,W S


Full Text : http://www.dtic.mil/get-tr-doc/pdf?AD=ADA096113


Report Date : Jan 1981


Pagination or Media Count : 143


Abstract : This report presents the results of a 7-month program to conduct a preliminary design analysis of a 500-SHP fuel-efficient regenerative turboshaft engine and to identify promising heat-exchanger concepts for such engines. A technology level consistent with that available in a 1980 demonstrator engine is assumed. Ninety engine/heat exchanger configuration and cycle combinations were examined. These included variations of compressor-stage configuration, compressor pressure ratio, turbine design-point inlet temperature, heat-exchanger effectiveness, and heat-exchanger pressure loss. These engine combinations were evaluated and screened on the basis of fuel economy, weight and cost, and several promising configurations were chosen for more detailed analysis. The most promising of these was selected for preliminary design. The study results indicate that an engine configuration with a cycle pressure ratio of 10:1, a turbine temperature of 2300 F, and a heat exchanger with an effectiveness of 0.70 is most suitable for the 1980 environment. However, with fuel costs projected to increase, the analyses indicate that a tubular heat exchanger with an effectiveness approaching 0.80 would be more attractive. (Author)


Descriptors :   *TURBOSHAFT ENGINES , *HEAT EXCHANGERS , *REGENERATION(ENGINEERING) , TEMPERATURE , COST EFFECTIVENESS , EFFICIENCY , WEIGHT , PRESSURE , FUEL CONSUMPTION


Subject Categories : Aircraft
      Jet and Gas Turbine Engines


Distribution Statement : APPROVED FOR PUBLIC RELEASE