Numerical Prediction of Pitch Damping Stability Derivatives for Finned Projectiles

Reynolds-averaged Navier–Stokes computational fluid dynamics and linear flight mechanics theory were used to compute the pitch damping dynamic stability derivatives for two basic finned projectiles using two numerical methods, namely, the transient planar pitching method and the steady lunar coning method. Numerical results were compared with free-flight and wind-tunnel experimental data for Mach numbers in the range of 0.5–4.5. The accuracy, efficiency, and dependence of these methods on various aerodynamic and numerical modeling parameters were investigated. The numerical methods generally showed good agreement with each other, except at some transonic Mach numbers. Both methods showed good to excellent agreement with experimental data in the high transonic and supersonic Mach regimes. In the subsonic and low transonic regimes, agreement between numerical and experimental data was less favorable. The accuracy of the free-flight test data in these regimes was uncertain due to instances of large scatter, ...

[1]  L. B. Schiff,et al.  Aerodynamics of bodies of revolution in coning motion. , 1969 .

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

[3]  R. Agarwal,et al.  Computation of supersonic laminar viscous flow past a pointed cone at angle of attack in spinning and coning motion , 1978 .

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

[5]  Lewis B. Schiff.  Nonlinear Aerodynamics of Bodies in Coning Motion , 1972 .

[6]  L. Schiff,et al.  Results from a new wind-tunnel apparatus for studying coning and spinning motions of bodies of revolution , 1970 .

[7]  Vishal Bhagwandin.  Numerical Prediction of Roll Damping and Magnus Dynamic Derivatives for Finned Projectiles at Angle of Attack , 2012 .

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

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

[10]  M. Tobak,et al.  Nonlinear aerodynamics of bodies of revolution in free flight , 1970 .

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

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

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

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

[17]  Walter B. Sturek,et al.  Navier-Stokes predictions of pitch damping for finned projectiles using steady coning motion , 1990 .

[18]  Lewis B. Schiff,et al.  Generalized Formulation of Nonlinear Pitch-Yaw-Roll Coupling: Part I-Nonaxisymmetric Bodies , 1975 .

[19]  Lewis B. Schiff,et al.  Generalized Formulation of Nonlinear Pitch-Yaw-Roll Coupling: Part 11-Nonlinear Coning-Rate Dependence , 1975 .

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

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

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

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

[24]  Jubaraj Sahu,et al.  Numerical Prediction of Pitch Damping Derivatives for a Finned Projectile at Angles of Attack , 2012 .

[26]  Walter B. Sturek,et al.  Navier-Stokes Predictions of Pitch Damping for Axisymmetric Projectiles , 1997 .