U.S. patents available from 1976 to present.
U.S. patent applications available from 2005 to present.

Icon_funbox Did You Know...

...that to encourage use of his new invention, the shopping cart, market owner Sylvan Goldman hired fake shoppers to push the carts around his store in Oklahoma City? Seems his customers were reluctant to give up their hand-carried baskets.

Newsletter  PatentStorm News

Make the Most of PatentStorm

See this month's Top Inventors and Most Cited Patents.

Stay on top of the latest patents by subscribing to an RSS feed.

Got questions? Ask a Patent Expert!

Registered users: Manage your profile, comments and alerts.

 

US Patent 6715984 - Stall prediction method for axial flow compressor

US Patent Issued on April 6, 2004
Estimated Patent Expiration Date: Icon_subject June 10, 2022Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
loading...


View Patent Images (PDF)
(Registered users only)

Abstract

In order to provide a stall prediction method for an axial flow compressor, a high response pressure sensor is provided in a duct wall adjacent to the leading edge of the rotor blade and a rotating stall is predicted by computing autocorrelation of pressure data obtained as a time history data. The initiation of rotating stall is determined when the autocorrelation of the time history data starts dropping rapidly. When it is determined that the rotating stall is imminent, generation of the rotating stall is prevented by taking necessary countermeasures such as to reduce the fuel supply.

Inventors

Assignee

Application

No. 10165927 filed on 06/10/2002

US Classes:

415/1, METHOD OF OPERATION415/118, WITH INSPECTION, SIGNALING, INDICATING OR MEASURING MEANS415/914DEVICE TO CONTROL BOUNDARY LAYER

Field of Search

415/1, METHOD OF OPERATION415/118, WITH INSPECTION, SIGNALING, INDICATING OR MEASURING MEANS415/914, DEVICE TO CONTROL BOUNDARY LAYER416/42, Pressure or altitude responsive416/61WITH MEASURING, TESTING, SIGNALLING OR INSPECTION MEANS

Examiners

Primary: Nguyen, Ninh H.

Attorney, Agent or Firm

US Patent References

5915917, Compressor stall and surge control using airflow asymmetry measurement
Issued on: 06/29/1999
Inventor: Eveker, et al.
6098010, Method and apparatus for predicting and stabilizing compressor stall
Issued on: 08/01/2000
Inventor: Krener, et al.
6231306Control system for preventing compressor stall
Issued on: 05/15/2001
Inventor: Khalid

International Class

F01D 2500

Comments

No comments for this page
 
 
Forgot password?
Register here