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):

Report Date:

1986-07-08

Pagination or Media Count:

11.0

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 ships 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

Subject Categories:

  • Jet and Gas Turbine Engines

Distribution Statement:

APPROVED FOR PUBLIC RELEASE