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An Analytical Investigation of Wing-Jet InteractionThe aerodynamic interaction between the wing and an inviscid jet with Mach number nonuniformity is formulated by using a two-vortex-sheet model for the jet. One of the vortex sheets accounts for the induced jet flow and the other the induced outer flow. No additional source distribution is needed for the jet at an angle of attack. The above problem is solved by satisfying the jet and wing tangency and the jet pressure-continuity conditions and using a quasi vortex lattice method for computing the induced flow field. The latter method is derived through theoretical consideration by properly accounting for singularities present in the equations and possesses the same simplicity and generality as the conventional vortex lattice method but has a better rate of numerical convergence. The resulting system of algebraic equations is solved by Purcell's vector method. The numerical formulation is first applied to the wing-slipstream interaction problem. Results for one centered-jet configuration are compared with those predicted by some existing theories.
Document ID
19740013520
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Lan, E. C. (Kansas Univ. Center for Research, Inc. Lawrence, KS, United States)
Date Acquired
September 3, 2013
Publication Date
April 1, 1974
Subject Category
Aerodynamics
Report/Patent Number
NASA-CR-138140
CRINC-FRL-74-001
Accession Number
74N21633
Funding Number(s)
CONTRACT_GRANT: NGR-17-002-107
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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