YU-TAI LEE
Engineers in Mc Lean, VA
License number
Pennsylvania PE031622E
Category
Engineers
Type
Professional Engineer
Address
Address
2
Mc Lean, VA 22102
Pennsylvania
Pennsylvania
Personal information
See more information about YU-TAI LEE at radaris.comName
Address
Phone
Herndon, VA
Mc Lean, VA
Professional information
Quiet And Efficient High-Pressure Fan Assembly
US Patent:
6386830, May 14, 2002
Filed:
Mar 13, 2001
Appl. No.:
09/804648
Inventors:
Michael E. Slipper - Blackwood NJ
Yu-Tai Lee - McLean VA
Yu-Tai Lee - McLean VA
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
F04D 2938
US Classification:
4152112, 416203, 416223 R
Abstract:
A high-pressure vane-axial fan assembly is provided. A rotor assembly has a plurality of rotor blades disposed circumferentially around and extending radially outward from a hub. Each rotor blade has an airfoil cross-section and is constructed to define a straight-ruled leading edge that extends outward from the hub. The rotor blade is rotated along its span relative to the straight-ruled leading edge. The plurality of rotor blades defines a solidity of greater than 1. A stator assembly has a plurality of stator vanes disposed circumferentially around and extending radially from the frame. There are a lesser number of stator vanes than rotor blades. The stator assembly is positioned adjacent the rotor assembly such that an axial gap is defined between the trailing edge of the rotor blades and the leading edge of the stator vanes. The axial gap increases with radial distance from the hub as defined by the shape of the trailing edge of the rotor blades and the shape of the leading edge of the stator vanes. The axial gap is a minimum of the rotor blades axial chord length along a central portion thereof.
Centrifugal Compressor With Vaneless Diffuser
US Patent:
6382912, May 7, 2002
Filed:
Oct 5, 2000
Appl. No.:
09/679604
Inventors:
Yu-Tai Lee - McLean VA
Thomas W. Bein - Annapolis MD
Thomas W. Bein - Annapolis MD
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
F04D 2942
US Classification:
4152245
Abstract:
A centrifugal compressor or pump has a vaneless diffuser within which a radially extending passage is formed between a fixed plate surface and a profile contoured shroud surface establishing a pinch point location of minimum passage area intermediate inlet and outlet ends of the diffuser passage. Convergent and divergent flow portions of the diffuser passage respectively extend to and from the pinch point to establish continuous convergent flow from the inlet end and divergent flow toward the outlet end for exit outflow at a flow angle less than that of a convergent inflow angle from the inlet end imposed along an initial profile segment.