Parametric Study of a YAV-8B Harrier in Ground Effect using Time-Dependent Navier-Stokes Computations

A process is described which enables the generation of 35 time-dependent viscous solutions for a YAV-8B Harrier in ground effect in one week. Overset grids are used to model the complex geometry of the Harrier aircraft and the interaction of its jets with the ground plane and low-speed ambient flow. The time required to complete this parametric study is drastically reduced through the use of process automation, modern computational platforms, and parallel computing. Moreover, a dual-time-stepping algorithm is described which improves solution robustness. Unsteady flow visualization and a frequency domain analysis are also used to identify and correlated key flow structures with the time variation of lift.

[1]  Neal M. Chaderjian,et al.  Parametric Time-Dependent Navier-Stokes Computations for a YAV-8B Harrier in Ground Effect , 2002 .

[2]  T. Pulliam.  Time accuracy and the use of implicit methods. [in CFD , 1993 .

[3]  William R. Van Dalsem,et al.  Numerical simulation of a complete STOVL aircraft in ground effect , 1993 .

[4]  David Ellsworth,et al.  Application-controlled demand paging for out-of-core visualization , 1997, Proceedings. Visualization '97 (Cat. No. 97CB36155).

[5]  C. Merkle,et al.  Dual time-stepping and preconditioning for unsteady computations , 1995 .

[6]  Neal M. Chaderjian,et al.  Automation of a Navier-Stokes S&C database generation for the Harrier in ground effect , 2002 .

[7]  Jorge M. M. Barata.  Numerical and experimental study of fountain flows produced by multijet impingement on a ground plane , 1991 .

[8]  F. Fritsch,et al.  A Method for Constructing Local Monotone Piecewise Cubic Interpolants , 1984 .

[9]  Karlin R. Roth,et al.  Comparison of Computation with Experiment for a Geometrically Simplified Powered-Lift Model , 1997 .

[10]  T. Pulliam,et al.  A diagonal form of an implicit approximate-factorization algorithm , 1981 .

[11]  James J. McGuirk,et al.  Numerical study of single impinging jets through a crossflow , 1989 .

[12]  W. R. Van Dalsem,et al.  Numerical investigation of a jet in ground effect with a crossflow , 1987 .

[13]  P. Spalart.  A One-Equation Turbulence Model for Aerodynamic Flows , 1992 .

[14]  William R. Van Dalsem,et al.  Numerical simulation of powered-lift flows , 1990 .

[15]  Dochan Kwak,et al.  The Overgrid Interface for Computational Simulations on Overset Grids , 2002 .

[16]  William R. Vandalsem,et al.  Numerical simulation of a powered-lift landing , 1993 .