Accession Number : AD0642714

Title :   SIMULATION OF A SHIP MODEL'S PRESSURE SIGNATURE.

Descriptive Note : Research and development rept.,

Corporate Author : NAVY MINE DEFENSE LAB PANAMA CITY FLA

Personal Author(s) : Watson,T. C. ; Strandhagen,A. G. ; Hogge,E. A.

Report Date : OCT 1966

Pagination or Media Count : 47

Abstract : Both theoretical and experimental studies demonstrate that the still-water pressure signature of a moving displacement body on a plane horizontal boundary can be simulated by a prescribed time variation of the flow in a stationary intake-exhaust nozzle pair in a fluid otherwise at rest. In the theory, the nozzle system is treated as a source-sink pair in an ideal fluid of finite depth with a deformable free surface. A relationship is derived to show the dependence of a specified perturbation pressure on the strengths of the source-sink pair. An experiment with an intake-exhaust nozzle pair of variable flow rate demonstrated in principle that ship-model pressure signatures could be simulated. (Author)

Descriptors :   (*SHIP MODELS, PRESSURE), HYDROSTATIC PRESSURE, SIMULATION, NOZZLES, FLUID FLOW, WATER WAVES

Subject Categories : Marine Engineering
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE