Unsteady aerodynamic modeling of a fighter wing in transonic flow

A numerical method for predicting steady and unsteady aerodynamic flows about aircraft wing configurations is presented. The numerical procedure solves the three-dimensional full-potential equation by a strongly implicit approximate factorization algorithm. Steady-flow analyses are obtained by relaxation, while unsteady analyses are calculated by time-accurate marching. In the present work, calculated steady, quasisteady, and unsteady wing surface pressures are presented for an F-5 fighter configuration and compared to experimental data for subsonic and transonic flight conditions.

[1]  J. Malone,et al.  Numerical simulation of 2-D unsteady transonic flows using the full-potential equation , 1983 .

[2]  J. B. Malone,et al.  AN IMPLICIT CONSERVATIVE ALGORITHM FOR STEADY AND UNSTEADY THREE-DIMENSIONAL TRANSONIC POTENTIAL FLOWS 81-1016 , 1981 .

[3]  H. L. Stone.  ITERATIVE SOLUTION OF IMPLICIT APPROXIMATIONS OF MULTIDIMENSIONAL PARTIAL DIFFERENTIAL EQUATIONS , 1968 .

[4]  J. Steger,et al.  A conservative finite difference algorithm for the unsteady transonic potential equation in generalized coordinates , 1982 .

[5]  P. M. Goorjian,et al.  Implicit computations of unsteady transonic flow governed by the full-potential equation in conservation form , 1980 .

[6]  Lakshmi N. Sankar,et al.  Euler solutions for transonic flow past a fighter wing , 1987 .

[7]  W. Sotomayer,et al.  An algorithm for unsteady transonic flow about tapered wings , 1984 .

[8]  F. X. Caradonna,et al.  A conservative implicit finite difference algorithm for the unsteady transonic full potential equation , 1980 .

[9]  D. Rizzetta,et al.  Numerical solution of three-dimensional unsteady transonic flow overswept wings , 1980 .

[10]  G. P. Guruswamy,et al.  An efficient coordinate transformation technique for unsteady, transonic aerodynamic analysis of low aspect-ratio wings , 1984 .

[11]  J. B. Malone,et al.  Numerical simulation of two-dimensional unsteady transonic flows using the full-potential equation , 1984 .

[12]  A. Jameson,et al.  A finite volume method for transonic potential flow calculations , 1977 .

[13]  W. F. Ballhaus,et al.  Implicit approximate-factorization schemes for the low-frequency transonic equation , 1975 .

[14]  Stanley Osher,et al.  A fast, time-accurate, unsteady full potential scheme , 1987 .

[15]  A. N. Kraan,et al.  Transonic wind-tunnel tests on an oscillating wing with external store. Part II: The clean wing , 1978 .