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Abstract

Supercavitating bodies can achieve very high speeds under water by virtue of reduced drag: with proper design, a cavitation bubble is generated at the nose and skin friction drag is drastically reduced. Depending on the type of supercavitating vehicle under consideration, the overall drag coefficient can be an order of magnitude less than that of a fully-wetted vehicle. However, as discussed in this article, control and maneuvering present special challenges. Strategies for meeting those challenges are also presented. The first section describes example vehicle configurations, and discusses the nonlinear forces acting on the cavitator, the fins (if present), and any portions of the hull that penetrate the cavity boundary during excursions from the fully-enveloped condition. The need for a bank-to-turn maneuvering strategy is also discussed. The second section describes simulation of vehicle flight, including system stability and system performance during execution of a banked turn. Without control, some vehicle configurations can be unstable, whereas a feedforward-feedback strategy can control some configurations over a range of turn rates.

Keywords

supercavitation bank-to-turn underwater maneuvering

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References

Brodetsky, S. , 1923, “Discontinuous fluid motion past circular and elliptic cylinders,” Proceedings of the Royal Society A102 (as summarized in May, 1975).

Fine, N.E. , Kinnas, S.A. , 1993, “A boundary element method for the analysis of the flow around 3-D cavitating hydrofoils,” Journal of Ship Research 37(1).

Garabedian, P.R. , 1956, “Calculation of axially symmetric cavities and jets,” Pacific Journal of Mathematics 6 (as summarized in May, 1975).

Gieseke, T.J. , editor, 1997, in Proceedings of the Third International Symposium on Performance Enhancement for Marine Applications, Naval Undersea Warfare Center Division, Newport, RI.

Kiceniuk, T. , 1954, “An experimental study of the hydrodynamic forces acting on a family of cavity-producing conical bodies of revolution inclined to the flow”, CIT Hydrodynamics Report E-12.17, California Institute of Technology, Pasadena, CA (as summarized in May, 1975).

Kirschner, I.N., 1990, “Flat-cavity analysis of leading-edge vortex separation from slender wings”, PhD dissertation, Rackham School of Graduate Studies, The University of Michigan, Ann Arbor, MI.

Kirschner, I.N. , Uhlman Jr., J. S. , Varghese, A. N. , and Kuria, I.M. , 1995, “Supercavitating projectiles in axisymmetric subsonic liquid flows,” in Proceedings of the ASME JSME Fluids Engineering Annual Conference and Exhibition, Cavitation and Multiphase Flow Forum, FED 210, J. Katz , J., Matsumoto Y ., eds, American Society of Mechanical Engineers, New York, NY.

LEGI , 2000, in Proceedings of the Scientific Meeting on High-Speed Hydromechanics and Supercavitation, Laboratoire des Ecoulements Géophysiques et Industriels, Grenoble, France.

Logvinovich, G.V. , 1980, “Some problems in planing surfaces [sic]”, translated from “Nekotoryyi voprosy glissirovaniya i kavitatsii [Some problems in planing and cavitation],” Trudy TsAGI 2052, Moscow, Russia.

10.

Logvinovich, G.V. , Buivol V.N. , Dudko A.S. , Putilin S.I. , and Shevchuk Y.R. , 1985 Flows with Free Surfaces, Naukova Dumka, Kiev, Ukraine (in Russian).

11.

MATH WORKS , 1998, Control System Toolbox for Use with MATLAB®, The Math Works, Inc., Natick, MA.

12.

May, A. , 1975, “Water entry and the cavity-running behavior of missiles”, SEAHAC TR 75-2, Naval Sea Systems Command, Arlington, VA.

13.

Münzer, H. and Reichardt, H. , “Rotational symmetric source-sink bodies with predominantly constant pressure distributions [sic]”, ARE Translation 1/50, Aerospace Research Establishment, England (as summarized in May, 1975).

14.

Reichardt, H. , 1946, “The laws of cavitation bubbles at axially symmetrical bodies in a flow [sic]”, Ministry of Aircraft Production Volkenrode, MAP-VG, Reports and Translations 766, Office of Naval Research, Arlington, VA.

15.

Savchenko, Y.N. , 2000, “Supercavitation: Applications and Perspectives”, in LEGI (2000).

16.

Savchenko, Y.N. , Semenenko, V. N. , Naumova, Y.I. , Varghese, A.N. , Uhlman, J.S. , and Kirschner, I.N. , 1997, “Hydrodynamic characteristics of polygonal contours in supercavitating flow”, in Gieseke (1997).

17.

Semenenko, V.N. , 2000, “Dynamics of supercavitating bodies”, in LEGI (2000).

18.

Tulin, M.P. , 1958, “New developments in the theory of supercavitating flows,” in Proceedings of the Second Symposium on Naval Hydrodynamics, Office of Naval Research, Arlington, VA (as summarized in May, 1975).

19.

Tulin, M.P. , 1959, “Supercavitating flow past slender delta wings,” Journal of Ship Research 3(3).

20.

Uhlman, J.S. , 1987, “The surface singularity method applied to partially cavitating hydrofoils,” Journal of Ship Research 31(2).

21.

Uhlman, J.S. , 1989, “The surface singularity or boundary element method applied to supercavitating hydrofoils,” Journal of Ship Research 33(1).

22.

Varghese, A.N. , Uhlman, Jr., J.S. , and Kirschner I.N. , 1997, “Axisymmetric slender-body analysis of supercavitating high-speed bodies in subsonic flow”, in Gieseke (1997).

23.

Waid, R.L. , 1957, “Cavity shapes for circular disks at angles of attack”, CIT Hydrodynamics Report E-73.4, California Institute of Technology, Pasadena, CA (as summarized in May, 1975).

24.

Wu, T. Y-T , 1956, “A free streamline theory for two-dimensional fully cavitated hydrofoils [sic],” Journal of Mathematics and Physics 35 (as summarized in May, 1975).

Control Strategies For Supercavitating Vehicles

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