Accession Number : ADD014183

Title :   Variable Camber Tandem Blade Bow for Turbomachines.

Descriptive Note : Patent, filed 19 Dec 84, Patented 8 Jul 86,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Stricker, John G

Report Date : 08 Jul 1986

Pagination or Media Count : 11

Abstract : Multiple flat-plate blade rows of pitch adjustable blades are offset mounted in a manner such that when flat-plate blades in adjacent rows are aligned at a specific pitch setting, respective flat-plate blades of the adjacent rows nearly mate. The offset between the flat-plate blade rows functions to produce unequal pitch angle settings of the blades of adjacent rows which, in turn, function to produce the result that the respective flat-plate blades which nearly mate, in combination, produce a blade configuration which has an effective camber. This invention relates generally to variable pitch, flat-plate blade rows for turbomachinery, and more particularly, to variable pitch, offset multiple flat-plate blade rows for bidirectional thrust or flow devices which effectively provide variable camber blade row configurations. Variable pitch, flat-plate blade rows are commonly used in applications where bidirectional thrust or flow is required. One such application is bow or stern bidirectional thrusters installed on naval ships to provide a turning capability independent of the ship's main propulsion and steering systems. Another application is in certain blower and air distribution duct systems where bidirectional air flow is required. PAT-CL-415-130. (jes)

Descriptors :   *CAMBER, *MARINE PROPULSION, *TURBOMACHINERY, AIR, AIR FLOW, BLADES, CONFIGURATIONS, DIRECTIONAL, DISTRIBUTION, DUCTS, FLOW, FUNCTIONS, NAVAL VESSELS, PITCH(INCLINATION), PITCH(MOTION), PLATES, SETTING(ADJUSTING), SHIP STERNS, STEERING, THRUST, THRUSTERS, VARIABLES

Subject Categories : Jet and Gas Turbine Engines

Distribution Statement : APPROVED FOR PUBLIC RELEASE