Numerical Prediction of Pitch Damping Derivatives for a Finned Projectile at Angles of Attack

This study extends the time-accurate forced-oscillation planar pitching ReynoldsAveraged method to predict the pitch damping dynamic stability derivative at non-zero angles of attack for projectile munitions. The simulations were performed for two configurations of the Army-Navy Finner Missile at Mach 1.96, for two Reynolds number test conditions, and for angles of attack ranging from 0–85°. Comparisons with archival wind tunnel data indicated good to excellent numerical prediction for the pitch damping moment. For the static aerodynamic coefficients, the method predicts the pitching moment with excellent accuracy, and the pitching moment slope with fair accuracy.

[1]  K. Chien,et al.  Predictions of Channel and Boundary-Layer Flows with a Low-Reynolds-Number Turbulence Model , 1982 .

[2]  Scott M. Murman,et al.  Reduced-Frequency Approach for Calculating Dynamic Derivatives , 2007 .

[3]  Jang-Hyuk Kwon,et al.  Prediction of dynamic damping coefficients using unsteady dual-time stepping method , 2002 .

[4]  Yoonsik Kim,et al.  Prediction of damping coefficients using the unsteady Euler equations , 2003 .

[5]  Sidra I. Silton,et al.  Navier-Stokes Predictions of Dynamic Stability Derivatives: Evaluation of Steady-State Methods , 2009 .

[6]  Scott M. Murman,et al.  Dynamic Analysis of Atmospheric-Entry Probes and Capsules , 2007 .

[7]  Donald E. Carlucci,et al.  Ballistics: Theory and Design of Guns and Ammunition , 2007 .

[8]  Paul Weinacht.  Characterization of Small-Caliber Ammunition Performance Using a Virtual Wind Tunnel Approach , 2007 .

[9]  Bob L. Uselton,et al.  Test Mechanism for Measuring Pitch-Damping Derivatives of Missile Configurations at High Angles of Attack , 1975 .

[10]  Scott M. Murman,et al.  Dynamic Viscous Simulations of Atmospheric-Entry Capsules , 2008 .

[11]  Jubaraj Sahu,et al.  NUMERICAL COMPUTATIONS OF DYNAMIC DERIVATIVES OF A FINNED PROJECTILE USING A TIME- ACCURATE CFD METHOD , 2007 .

[12]  Charles H Murphy,et al.  FREE FLIGHT MOTION OF SYMMETRIC MISSILES , 1963 .

[13]  John F. Stalnaker,et al.  COMPUTATION OF STABILITY DERIVATIVES OF SPINNING MISSILES USING UNSTRUCTURED CARTESIAN MESHES , 2002 .

[14]  A D Dupuis,et al.  Aeroballistic Range Tests of the Basic Finner Reference Projectile at Supersonic Velocities , 1997 .

[15]  Hasan U. Akay,et al.  CFD predictions of dynamic derivatives for missiles , 2002 .