Apparatus and method for preventing laminar boundary layer separ

Details Apparatus and method for preventing laminar boundary layer separ Apparatus and method for preventing laminar boundary layer separ

1997-08-11

1999-03-02

Ryznic, John E.

Rotary kinetic fluid motors or pumps

With passage in blade, vane, shaft or rotary distributor...

415904, F01D 514, F03B 1304

Patent

active

058761829

ABSTRACT:
The boundary layer stimulation by blowing flow fluid into the proximity of the separation region on turbine blades is disclosed. In order to prevent a laminar boundary layer separation, the blowing-in takes place in the form of intermittent fluid pulses. A particularly advantageous arrangement for an axial turbomachinery rotor disk is provided for this purpose, on the end face of which a stationary ring is provided which has at least one passage opening with which inlet openings for the blade fluid ducts which are provided in the disk which passes by and by way of which the blowing into the proximity of the separation region takes place, become periodically congruent.

REFERENCES:
patent: 4581887 (1986-04-01), Scheffler et al.
patent: 5397217 (1995-03-01), DeMarche et al.
"Unsteady Wake-Induced Boundary Layer Transition in High Lift LP Turbines," by Volker Schulte and Howard P. Hodson, ASME-Paper 96 GT 486, published at IGTI Conference in Birmingham on Jun. 11, 1996, accepted for publication the Journal of Turbomachinery.

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