An Assessment of Naval Hydromechanics Science and Technology by Committee for Naval Hydromechanics Science and Technology,

By Committee for Naval Hydromechanics Science and Technology, Naval Studies Board, National Research Council

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So there is more emphasis on submarines and issues related to stealth, such as hydroacoustics, wakes, and cavitation. It appears unrealistic to expect the rest of the world to pursue the kind of fundamental research that is needed to underpin the design of future generations of United States naval platforms. SCOPE, DEGREE, AND STABILITY OF NON-NAVY ACTIVITIES IN KEY TECHNOLOGIES Historically, fluid mechanics research at ONR has enjoyed a productive partnership with other agencies and military services.

TECHNOLOGY ISSUES 17 with a free surface requires a detailed understanding of the vortex interactions at the free surface. Freesurface turbulence has features that are quite different from the turbulence in fully submerged flow because of the complex vortical interactions at the free surface. Aeration due to ship waves, wave breaking, and boundary layer entrainment are also not well understood. A complete knowledge of the source of bubbles in the wake of a ship is far from within our grasp. All these topics are of crucial interest to the stealth problem of surface vessels and submerged vessels running at shallow depths.

Finally, the ONR tabulation lists three projects in three overseas organizations: the Maritime Research Institute of the Netherlands, University College, London, and Ecole Centrale de Nantes, two of which are universities. Another measure of naval hydromechanics research activity can be found in publications in scientific journals. S. publications devoted to hydromechanics research: the Journal of Ship Research, published by the Society of Naval Architects and Marine Engineers (SNAME), and the Proceedings of the International Workshop on Water Waves and Floating Bodies.

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