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Evaluation of The Dispersion Uniformity of Footprint of The Magnus Rotor Type Dispersive Submunition

Magnus Rotor형 분산자탄 탄착군의 분산 균일도 평가

  • Hyeongyu Sakong (Missile Research Institute, Agency for Defense Development)
  • Received : 2023.11.24
  • Accepted : 2024.02.21
  • Published : 2024.04.05

Abstract

Dispersion munitions are often equipped with dispersive submunitions used to scatter bombs over a wide area, and one of the types of dispersive submunitions is the Magnus rotor, commonly referred to as a self-rotating flying body. The Magnus rotor is designed to be dispered over a wide area by utilizing the principle of the Magnus effect through self-rotation, and has various trajectories depending on the initial conditions from the mother dispersion munition. In this paper, an index to evaluate the dispersion uniformity of footprint of the dispersive submunition is presented and the dispersion uniformity according to various initial release conditions is evaluated, and it is getting larger with high incidence angle and get max value at certain initial angular velocity.

Keywords

References

  1. Platou, A., "Magnus Characteristics of finned and nonfinned projectile," AIAA Journal, Vol. 3, No. 1, pp. 83-90, 1965. https://doi.org/10.2514/3.2791
  2. Brunk, J., "User's manual: Extended capability magnus rotor and ballistic body 6-DOF trajectory program," Alpha Research, InC., Technical report AFATL-TR-70-40, 1970.
  3. Brunk, J., "Flight dynamics and dispersion characteristics of S-curve and roll-through-zero bomblets," Alpha Research, InC., Technical report AFATL-TR-72-181, 1972.
  4. Brunk, J., "Aerodynamics and flight mechanics of magnus-rotor bomblets Volume III. special aerodynamic studies," Alpha Research, InC., Technical report AFATL-TR-68-73, 1968.
  5. Brunk, J. et al., "The dynamics of spinning bodies at large angle of attack," Air force office of scientific research, Technical report AF 29(600)-2936, 1962.
  6. Tobak, M. et al., "Aerodynamics of bodies of revolution in coning motion," AIAA Journal, Vol. 7, No. 1, January, 1969.
  7. Tobak, M. et al., "Aerodynamics of bodies of revolution in nonplanar motion," AIAA 6th Aerospace Sciences Meeting, No. 68-20, January 22-24, 1968.
  8. Sedney, R., "A model for bomblet ejection from missiles," Journal of spacecraft, Vol. 15, No. 4, pp. 229-235, 1978. https://doi.org/10.2514/3.57309
  9. Peterson, K., "Numerical simulation investigations in weapon delivery probabilities," Naval postgraduate school, Ph.D thesis, 2008.
  10. Zipfel, P., "On flight dynamics of magnus rotors," Department of Army, Technical report 117, 1970.
  11. Yun, S. and Hwang, J., "Precise distribution simulation of scattered submunitions based on flight test data," Int'l J. of Aeronautical&Space, 18(1), pp. 108-117, 2017.
  12. Bai, I., "Quantitative anlaysis of initial dispersion condition effects on randomness of magnus rotor bomblet," Journal of Korea Society for Simulation, Vol. 28, No. 3, pp. 83-89, 2019.
  13. Baum, M. et al., "Analysis of Residential Irrigation Distrivution Uniformity" Journal of Irrigation and Drainage Engineering, Vol. 131, No. 4, pp. 336-341, 2005. https://doi.org/10.1061/(ASCE)0733-9437(2005)131:4(336)
  14. Li, P. et al., "CFD study on flow distribution uniformity in fuel distributors having multiple structural bifurcations of flow channels," International Journal of Hydrogen Energy, 35, pp. 9186-9198, 2010. https://doi.org/10.1016/j.ijhydene.2010.06.043
  15. Ebrahimi, M. et al., "Designing of ECAP parameters based on strain distribution uniformity," Progress in Natural Science, Vol. 22, No. 5, pp. 452-460, 2012. https://doi.org/10.1016/j.pnsc.2012.08.001
  16. Luo, L. et al., "Numerical study on the improvement of flow distribution uniformity among parallel mini-channels" PChemical Engineering and Processing, 95, pp. 63-71, 2015. https://doi.org/10.1016/j.cep.2015.05.014
  17. John, D., "A suite of minimal bounding objects," MATLAB Central File Exchange, version 1.2.0.0, 2024.