Accession Number : ADD017714

Title :   Design of an Integrated Inlet Duct for Efficient Fluid Transmission.

Descriptive Note : Patent, Filed 30 Sep 94, patented 8 Aug 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Dai, Charles M ; Kerr, Christopher J ; Nguyen, Phuc N ; Wang, Han Ching

Report Date : 08 Aug 1995

Pagination or Media Count : 42

Abstract : The invention is directed to a method for designing a fluid inlet duct for a marine vehicle hull, generally comprises the steps of: (a) determining an inlet duct surface geometry, represented by a series of fifth-order Bezier cross-link curves, within specified hydrodynamic design constraints; (b)generating a panel representation of the surface geometry; (c) calculating the pressure and velocity distributions of the flow within the inlet duct; (d) evaluating the surface geometry; (e) repeating steps (a)-(d) for subsequent iterations of the surface geometry until the specified hydrodynamic design constraints are satisfactorily met at a predetermined design condition; (fl evaluating a resulting surface geometry at off-design conditions; (g) repeating step (a)-(d) for subsequent iterations of the surface geometry until the specified hydrodynamic design constraints are satisfactorily met at off-design conditions; (h) performing a geometric refinement to a fillet region of high curvature in the inlet duct; (i) generating a panel representation of a resulting surface geometry; (j) calculating the pressure and velocity distributions of the flow within the inlet duct; (k) evaluating the surface geometry at desired operating conditions; and (1) repeating steps (h)-(k) for subsequent iterations of the surface geometry until the specified hydrodynamic design constraintS are optimally met. (MM)

Descriptors :   *FLUID FLOW, *PATENTS, *DUCT INLETS, VELOCITY, COMPUTER PROGRAMS, PITCH(INCLINATION), AIRCRAFT, SHAPE, CURVATURE, FLOW RATE, HYDRODYNAMICS, ASPECT RATIO, MARINE PROPULSION, CONDENSATION, CURVES(GEOMETRY), WATER JETS, FLUSHING

Subject Categories : Pumps, Filters, Pipes, Tubing, Fittings & Vlvs
      Fluid Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE