A static investigation of several STOVL exhaust system conceptsA static cold flow scale model test was performed in order to determine the internal performance characteristics of various STOVL exhaust systems. All of the concepts considered included a vectorable cruise nozzle and a separate vectorable vertical thrust ventral nozzle mounted on the tailpipe. The two ventral nozzle configurations tested featured vectorable constant thickness cascade vanes for area control and improved performance during transition and vertical lift flight. The best transition performance was achieved using a butterfly door type ventral nozzle and a pitch vectoring 2DCD or axisymmetric cruise nozzle. The clamshell blocker type of ventral nozzle had reduced transition performance due to the choking of the tailpipe flow upstream of the cruise nozzle.
Document ID
19890059809
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Romine, B. M., Jr. (General Electric Co. Cincinnati, OH, United States)
Meyer, B. E. (GE Aircraft Engines Cincinnati, OH, United States)
Re, R. J. (NASA Langley Research Center Hampton, VA, United States)