The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 24, 2007
Filed:
Apr. 05, 2004
Applicant:
Erik Johann, Berlin, DE;
Inventor:
Erik Johann, Berlin, DE;
Assignee:
Rolls-Royce Deutschland Ltd & Co KG, Blankenfelde-Mahlow, DE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
F04D 21/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
On a compressor with compressor blades, a flow transition fixation mechanism () is provided on the suction side (), approximately parallel to the leading edge () and upstream of the compression shocks acting upon the blade, which prevents the transition point from the laminar to the turbulent boundary layer flow from oscillating, thus suppressing oscillation of the compression shocks and their coupling effect with the natural frequencies of the compressor blades.