Journal of Mechanical Science and Technology

  • 제20권11호
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  • Pages.1961-1971
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  • 2006
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  • 1738-494X(pISSN)
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  • 1976-3824(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
권호 표지

Design Study of a Small Scale Soft Recovery System

  • Yoo, Il-Yong (Department of Aerospace Engineering, Inha University) ;
  • Lee, Seung-Soo (Department of Aerospace Engineering, Inha University) ;
  • Cho, Chong-Du (Department of Mechanical Engineering, Inha University)
  • 발행 : 2006.11.01
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초록

A soft recovery system (SRS) is a device that stops a high speed projectile without damaging the projectile. The SRS is necessary to verify the shock resistant requirements of microelectronics and electro-optic sensors in smart munitions, where the projectiles experience over 20,000 g acceleration inside the barrel. In this study, a computer code for the performance evaluation of a SRS based on ballistic compression decelerator concept has been developed. It consists of a time accurate compressible one-dimensional Euler code with use of deforming grid and a projectile motion analysis code. The Euler code employs Roe's approximate Riemann solver with a total variation diminishing (TVD) method. A fully implicit dual time stepping method is used to advance the solution in time. In addition, the geometric conservation law (GCL) is applied to predict the solutions accurately on the deforming mesh. The equation of motion for the projectile is solved with the four-stage Runge-Kutta time integration method. A small scale SRS to catch a 20 mm bullet fired at 500 m/s within 1,600 g-limit has been designed with the proposed method.

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참고문헌

  1. Baysal, O., 1986, 'Navier-Stokes Analysis of Muzzle-Blast-Type Waves,' AIAA Journal, Vol. 24, No.5, pp.800-806 https://doi.org/10.2514/3.9348
  2. Clarke, E. Y., Ruth, C. R., Evans, J. W., Bowen, J. E. and Hewitt, J. R., 1981, Large Caliber Projectile Soft Recovery, Memorandum Report ARBRL-MR-03083
  3. Evans, J. W., Ruth, C. R. and Clarke, E. V., 1981, Soft Recovery Tests of A 1500-mm Cannon Launched Guided Projectile Warhead, Type T, Memorandum Report ARBRL-MR-03107
  4. Grossman, B. and Walters, R. W., 1989, 'Analysis of Flux-Split Algorithms for Euler's Equation with Real Gases,' AIAA Journal, Vol. 27, No.5, pp.524-531 https://doi.org/10.2514/3.10142
  5. Harten, A., 1983, 'High Resolution Schemes for Hyperbolic Conservation Laws,' J. of Compo Physics, Vol. 49, pp.357-393 https://doi.org/10.1016/0021-9991(83)90136-5
  6. Holzle, J., 2001, 'Soft Recovery of Large Caliber Flying Processors,' 19th International Symposium of Ballistics, Interlaken, Switzerland
  7. Merkle, C. L. and Athavale, M., 1987, 'Time Accurate Unsteady Incompressible Flow Algorithms Based on Artificial Compressibility,' AIAA paper 87-1137, Proceedings of AIAA 8th Computational Fluid Dynamics Conference, Honolulu, Hawaii
  8. Sod, G. A., 1978, 'A Survey of Several Finite Difference Methods for Systems of Nonlinear Hyperbolic Conservation Laws,' J. of Compo Physics, Vol. 27, pp. 1-31 https://doi.org/10.1016/0021-9991(78)90023-2
  9. Teng, R. N., 1972, Ballistic Compression Decelerator, U.S. Patent No.3, 678, 745, issued to McDonnell Douglas Corporation
  10. Thomas, P. D. and Lombard, C. K., 1978, 'The Geometric Conservation Law- A Link Between Finite-Difference and Finite-Volume Methods of Flow Computation on Moving Grids,' AIAA paper 78-1208, AIAA 11th Fluid and Plasma Dynamics Conference, Seattle, Washington
  11. Van Leer, B., 1979, 'Towards the Ultimate Conservative Difference Scheme. V. A Second Order Sequel to Godunov's Method,' J. of Compo Physics, Vol. 32, pp. 101-136 https://doi.org/10.1016/0021-9991(79)90145-1