Experimental evaluation of exhaust mixers for an Energy Efficient EngineStatic scale model tests were conducted to evaluate exhaust system mixers for a high bypass ratio engine as part of the NASA sponsored Energy Efficient program. Gross thrust coefficients were measured for a series of mixer configurations which included variations in the number of mixer lobes, tailpipe length, mixer penetration, and length. All of these parameters have a significant impact on exhaust system performance. In addition, flow visualization pictures and pressure/temperature traverses were obtained for selected configurations. Parametric performance trends are discussed and the results considered relative to the Energy Efficient Engine program goals.
Document ID
19800054733
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kozlowski, H. (United Technologies Corp. Pratt and Whitney Aircraft Group, East Hartford, Conn., United States)
Kraft, G. (NASA Lewis Research Center Cleveland, Ohio, United States)