Viscous drag reduction via surface mass injectionSlot injection systems on the surfaces of aerodynamic bodies have been noted to consistently furnish substantial local skin friction reductions which are predictable on the basis of current numerical methods. Only crude systems studies, however, have been thus far completed. The most common configuration for slot ingestion in the literature involves tangential injection of air along a two-dimensional surface on which air constitutes the mainstream flow; attention is presently given to slot injection in low-speed and high-speed flows, as well as a discussion of aircraft applications and an evaluation of prospective possibilities for practical drag-reduction systems.
Document ID
19910028075
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Hefner, Jerry N. (NASA Langley Research Center Hampton, VA, United States)
Bushnell, Dennis M. (NASA Langley Research Center Hampton, VA, United States)