Application of Computational Fluid Dynamics to Advanced Guided Munitions

This paper presents the results of computational fluid dynamics (CFD) investigations to predict the flow field and aerodynamic coefficients for various guided munitions. Scalable Navier-Stokes solvers have been used to obtain numerical solutions for complex configurations. Large computational resources were required to capture the flow field interference effects associated with these complex configurations. A summary of the predictive numerical capabilities used for these flow field computations is described. Both static and dynamic coupled CFD/rigid body dynamics results are presented. Some unsteady results associated with maneuvering canards are shown for a smart munition. Computed results are compared with experimental data obtained for the same configurations and conditions where available. The results help to show the present predictive capabilities of CFD techniques for guided projectile and missile configurations.

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

[2]  Karen R. Heavey,et al.  Application of CFD to High Angle of Attack Missile Flow Fields , 2000 .

[3]  Jubaraj Sahu,et al.  Viscous CFD Calculations of Grid Fin Missile Aerodynamics in the Supersonic Flow Regime , 2001 .

[4]  E. Fournier,et al.  Wind Tunnel Investigation of Grid Fin and Conventional Planar Control Surfaces , 2001 .

[5]  Harris L. Edge,et al.  Computation of the roll moment for a projectile with warp-around fins , 1994 .

[6]  Jubaraj Sahu,et al.  Computational modeling of multibody aerodynamic interference , 1998 .

[7]  William Washington,et al.  Grid fins - A new concept for missile stability and control , 1993 .

[8]  S. Chakravarthy,et al.  A Wall-Distance-Free k-ε Model With Enhanced Near-Wall Treatment , 1998 .

[9]  Andrew M. Wissink,et al.  Unsteady aerodynamic simulation of static and moving bodies using scalable computers , 1999 .

[10]  Walter B. Sturek,et al.  Common High Performance Computing Software Support Initiative (CHSSI) Computational Fluid Dynamics (CFD)-6 Project. ARL Block-Structured Gridding Zonal Navier-Stokes Flow (ZNSFLOW) Solver Software , 2000 .

[11]  J. Steger,et al.  Implicit Finite-Difference Simulations of Three-Dimensional Compressible Flow , 1980 .

[12]  Harris L. Edge,et al.  Three-Dimensional (3D) Large Fluid Flow Computations for U.S. Army Applications on KSR-1, CM-200, CM-5, and Cray C-90. , 1995 .

[13]  Robert L. Meakin,et al.  Computations of the unsteady flow about a generic wing/pylon/finned-store configuration , 1992 .

[14]  Jubaraj Sahu,et al.  Numerical simulation of three dimensional transonic flows , 1990 .

[15]  Jubaraj Sahu,et al.  Computational Modeling of Sense and Destroy Armor (SADARM) Submunition Separation/Collision. , 1997 .

[16]  Karen R. Heavey,et al.  Parallel Numerical Computations of Projectile Flow Fields , 1999 .

[17]  T. L. Donegan,et al.  Extended chimera grid embedding scheme with application to viscous flows , 1987 .