NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Collections About News Help Login
Back to Results
Effects of spanwise blowing on the surface pressure distribution and vortex-lift characteristics of a trapezoidal wing-strake configurationThe effects of spanwise blowing on the surface pressures of a 44 deg swept trapezoidal wing-strake configuration were measured. Wind tunnel data were obtained at a free stream Mach number of 0.26 for a range of model angle of attack, jet thrust coefficient, and nozzle chordwise location. Results showed that spanwise blowing delayed the leading edge vortex breakdown to larger span distances and increased the lifting pressures. Vortex lift was achieved at span stations immediately outboard of the strake-wing junction with no blowing, but spanwise blowing was necessary to achieve vortex lift at increased span distances. Blowing on the wing in the presence of the strake was not as effective as blowing on the wing alone. Spanwise blowing increased lift throughout the angle-of-attack range, improved the drag polars, and extended the linear pitching moment to higher values of lift. The leading edge suction analogy can be used to estimate the effects of spanwise blowing on the aerodynamic characteristics.
Document ID
19790008632
Acquisition Source
Legacy CDMS
Document Type
Technical Publication (TP)
Authors
Campbell, J. F. (NASA Langley Research Center Hampton, VA, United States)
Erickson, G. E. (Northrop Corp. Hawthorne, Calif., United States)
Date Acquired
September 3, 2013
Publication Date
February 1, 1979
Subject Category
Aerodynamics
Report/Patent Number
NASA-TP-1290
L-11641
Accession Number
79N16803
Funding Number(s)
PROJECT: RTOP 505-11-21-02
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

Related Records

There are no records associated with this record.
No Preview Available