Design of an integrated inlet duct for efficient fluid transmiss

Details Design of an integrated inlet duct for efficient fluid transmiss Design of an integrated inlet duct for efficient fluid transmiss

1994-09-30

1995-08-08

Avila, Stephen

Marine propulsion

Jet drive

Having means to increase fluid drive means efficiency

B63H 11103

Patent

active

054394023

ABSTRACT:
The invention is directed to a method for designing a fluid inlet duct for 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; (f) 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 (l) repeating steps (h)-(k) for subsequent iterations of the surface geometry until the specified hydrodynamic design constraints are optimally met.

REFERENCES:
patent: 3840319 (1974-10-01), Rhoda
patent: 4276035 (1981-06-01), Kobayashi
patent: 5289793 (1994-03-01), Aker

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