NUMERICAL STUDY OF AN EXTERNAL STORE RELEASED FROM A FIGHTER AIRCRAFT

  • Yoon, Young-Hyun (Department of AerospaceEngineering, R.O.K Air Force Academy, Cheongwon Choongbuk) ;
  • Cho, Hwan-Kee (Department of AerospaceEngineering, R.O.K Air Force Academy, Cheongwon Choongbuk) ;
  • Chung, H.S. (Department of AerospaceEngineering, R.O.K Air Force Academy, Cheongwon Choongbuk) ;
  • Lee, S.H. (Department of AerospaceEngineering, R.O.K Air Force Academy, Cheongwon Choongbuk) ;
  • Han, C.H. (Department of Aeronautical and Mechanical Design Engineering, Chungju National University)
  • Published : 2008.12.31

Abstract

The prediction of the separation trajectories of external stores released from a military aircraft is an important task in the aircraft design area having the objective to define the operational and release envelopes. This paper presents the results obtained for store separation by employing commercial softwares, FLUENT and CFD-FASTRAN. FLUENT treats the rigid body motion by employing a remeshing scheme. CFD-FASTRAN uses Chimera(overset) grid and interpolations. It was found that, for the prediction of the trajectories and behavior of the stores separated from the wing, both codes show the good agreement with the experimental results.

Keywords

References

  1. 1979, Schindel, L.H., Store Separation, Advisory Group for Aerospace Research and Development, NATO(Paris), AGARDograph-AG-202
  2. 1981, Covert, E.E., "Conditions for Safe Separation of External Stores," Journal of Aircraft, Vol.18-8. pp.624-630
  3. 1980, Maddox, A.R., "Store Separation Trajectory Analysis," Journal of Aircraft, Vol.17. pp.769-773 https://doi.org/10.2514/3.44686
  4. 1981, Cenko, A. and Tinoco, E.N., "PAN AIR Applications to Weapons Carriage and Separation," Journal of Aircraft, Vol.18, pp.128-134 https://doi.org/10.2514/3.57473
  5. 1994, Barbero, S. and Ferretti, A., "Application of Euler Code to Evaluation of Store Released in a Heavily Disturbed Aircraft Flow Field," ICAS Paper 94-2.6.4
  6. 1981, Cenko, A. and Tinoco, E.N., "PAN AIR Applications to Weapons Carriage and Separation," Journal of Aircraft, Vol.18, pp.128-134 https://doi.org/10.2514/3.57473
  7. 2005, Zyluk, A., "Experimental Validation of Mathematical Model Describing External Store Separation," Journal of Theoretical and Applied Mechanics, Vol.43-4, pp.855-873
  8. 2000, Cenko, A. and Lutton, M., "A CFD Application to Store Separation Status Report," ICAS Paper 560.1
  9. 2000, Lee, S., Park, M. and Cho, K.W., "New Fully Automated Procedure for the Prediction of Store Trajectory," Journal of Aircraft, Vol.37, No.6
  10. 1996, Ningia, R.K., Ross, J.A. and Peto, J.W., "Theoretical and Experimental Studies of Vectoring Jets Effects on Under Wing Stores and Their Release Trajectories," ICAS Paper, 96-1.3.2
  11. 2000, Tomaro, R.F., Witzeman, F.C. and Strang, W.Z., "Simulation of Store Separation for the F/A-18C Using Cobalt 60," Journal of Aircraft, Vol.37. No.3. pp.870-878
  12. 2003, Snyder, D.O., Koutsavdis, E.K. and Anttonen, J.S.R., "Transonic Store Separation Using Unstructured CFD with Dynamic Meshing," FLUENT Technical Notes 202
  13. 2006, CFD Research Co., CFD-FASTRAN User Manual, Version 2006
  14. 1991, Heim, R.R., "CFD Wing/Pylon/Finned Store Manual Interference Wind Tunnel Experiment," AEDC-TSR-91-P4
  15. 1997, Hall, L.H., Mitchell, C.R. and Parthasarathy, V., "An Unsteady Simulation Technique for Missile Guidance and Control Applications," AIAA 1997-0636
  16. 2002, Westmoreland, S., "A Comparison of Inviscid and Viscous Approaches for Store Separations," AIAA 2002-1413
  17. 995, Thomas, R.D. and Jordan, J.K., "Investigation of Multiple Body Trajectory Prediction Using Time Accurate Computational Fluid Dynamics," AIAA 1995-1870
  18. 2004, Lee, R.M., "Beggar Code Implementation of the 6 DOF Capability for Stores with Moving Components," AIAA 2004-1251
  19. 2007, Cho, H.K., Yoon, Y.H., Baick, S.W., Chung, H.S. and Cho, D.H., "Experimental Study on Aircraft Store Separation Validation," The Korean Society for Aeronautical and Space Sciences, Fall Conference Proceeding