Numerical model for circulation-control flows

Current computational models for circulation-control flows have been applied, in most cases, to elliptical airfoils having only one blowing slot. We describe a two-dimensional Navier-Stokes solver that has been developed for modeling the flowfields of a circular airfoil with two jets. In its original form, the Baldwin-Lomax algebraic turbulence model is shown to be inadequate for describing compound boundary layers such as those produced by the wall jet. A new turbulence model is therefore proposed. To account for the nonequilibrium production of turbulence at the slot exits and for its suppression due to wall curvature, two corrections to the turbulence model were implemented

[1]  Timothy J. Barth,et al.  Navier-Stokes computations for circulation controlled airfoils , 1985 .

[2]  Hughes Helicopters,et al.  Analytic and Experimental Verification of the NOTAR Circulation Control Tail Boom , 1984 .

[3]  D. Choi,et al.  Analysis of Circulation-Controlled Airfoils in Transonic Flow , 1983 .

[4]  H. Lomax,et al.  Thin-layer approximation and algebraic model for separated turbulent flows , 1978 .

[5]  Jack N. Nielsen,et al.  Recent progress in circulation control aerodynamics , 1987 .

[6]  Jiunn-Chi Wu.  A study of unsteady turbulent flow past airfoils , 1988 .

[7]  N. J. Wood,et al.  Circulation control airfoils - Past, present, future , 1985 .

[8]  On the validation of a code and a turbulence model appropriate to circulation control airfoils , 1988 .

[9]  Leonard Roberts.  A theory for turbulent curved wall jets , 1987 .

[10]  F. A. Dvorak,et al.  Calculation of turbulent boundary layers and wall jets over curved surfaces. , 1973 .

[11]  M. Glauert.  The wall jet , 1956, Journal of Fluid Mechanics.

[12]  Robert N. Meroney,et al.  Measurements of turbulent boundary layer growth over a longitudinally curved surface , 1975 .

[13]  H. Berman.  A Navier-Stokes investigation of a circulation control airfoil , 1985 .

[14]  J. Steger,et al.  Recent improvements in efficiency, accuracy, and convergence for implicit approximate factorization algorithms. [computational fluid dynamics , 1985 .

[15]  R. F. Warming,et al.  An Implicit Factored Scheme for the Compressible Navier-Stokes Equations , 1977 .

[16]  George D. Shrewsbury.  Evaluation of a research circulation control airfoil using Navier-Stokes methods , 1987 .

[17]  Richard J Goldstein,et al.  Turbulent wall jets with cylindrical streamwise surface curvature , 1976 .

[18]  F. Dvorak,et al.  An analysis method for the viscous flow over circulation-controlled airfoils , 1978 .