Flow visualization studies of the internal flow characteristics in a simulated mixed flow vectored thrust ASTOVL engine configurationThe characteristics of internal flowfields in a Mixed Flow Vectored Thrust (MFVT) propulsion system for Short Take Off and Vertical Landing (STOVL) fighter aircraft were investigated using flow visualization techniques. A highly parametric 14 percent scale transparent model was used to simulate the MFVT propulsion system. The working medium was water. The mixing between the fan and core flow was studied using flow visualization for a variety of geometrical and flow parameters including three bypass ratio variations. The flow visualization technique involves the use of laser light sheet for illumination and fluorescent dye or air bubbles as tracers. Results indicate the existence of a strong vortex flowfield in the hover mode of operation that is responsible for good mixing between the fan and core flows.
Document ID
19910057933
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Saripalli, K. R. (McDonnell Douglas Research Laboratories Saint Louis, MO, United States)
Ferraro, P. J. (McDonnell-Douglas Research Labs. Saint Louis, MO, United States)
Flood, J. D. (McDonnell Aircraft Co. Saint Louis, MO, United States)
Grey, R. E. (NASA Lewis Research Center Cleveland, OH, United States)
Wazyniak, J. A. (Pratt and Whitney Group East Hartford, CT, United States)