Steven J Brzozowski

US Patent:

6585408, Jul 1, 2003

Filed:

Jul 30, 2001

Appl. No.:

09/916345

Inventors:

Lamyaa Abdel Alle El-Gabry - Schenectady NY
Steven J. Brzozowski - Scotia NY
Nirm V. Nirmalan - Niskayuna NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

G01N 2520

US Classification:

374 43, 374 44, 374162

Abstract:

An apparatus and method for measuring local heat transfer distribution of an object surface. The apparatus includes a heater element for providing heat flux, a member disposed on a surface of the heater element for receiving impinging cooling air. A liquid crystal element is provided on a side of the heater element remote from the surface, and an insulating material is disposed adjacent to the liquid crystal element and remote from the heater element. The apparatus further includes means for determining heat transfer distribution coefficients from the liquid crystal element.

US Patent:

7135863, Nov 14, 2006

Filed:

Sep 30, 2004

Appl. No.:

10/955635

Inventors:

Mehmet Arik - Niskayuna NY, US
Bulent Aksel - Clifton Park NY, US
William Dwight Gerstler - Niskayuna NY, US
Cherik Bulkes - Sussex WI, US
Douglas Arthur Kelley - San Mateo CA, US
Steven Joseph Brzozowski - Scotia NY, US

Assignee:

General Electric Company - Niskayuna NY

International Classification:

G01V 3/00

US Classification:

324318

Abstract:

A thermal management system and method for cooling Magnetic Resonance Imaging gradient coils. The system includes least one first header tube positioned adjacent to said gradient coils and configured to transport a coolant fluid; at least one set of cooling tubes connected to said header tube at inlet ends and configured to transport said coolant fluid, wherein said cooling tubes are parallel to each other and at least one second header tube positioned adjacent to said gradient coils, connected to said at least one set of cooling tubes at outlet ends of said at least one set of cooling tubes and configured to transport said coolant fluid.

US Patent:

56605250, Aug 26, 1997

Filed:

Jul 23, 1993

Appl. No.:

8/094998

Inventors:

Ronald Scott Bunker - Cincinnati OH
Nesim Abuaf - Schenectady NY
Steven Joseph Brzozowski - Scotia NY

Assignee:

General Electric Company - Cincinnati OH

International Classification:

F01D 518

US Classification:

416 97R

Abstract:

A wall adapted for use in a gas turbine engine between a first and a hotter second fluid includes a first side over which is flowable the first fluid, and an opposite second side over which is flowable the second fluid. An elongate slot extends inwardly from the second side and is disposed in flow communication with a plurality of longitudinally spaced apart holes extending inwardly from the first side. The holes are disposed at a compound angle relative to the second side for discharging the first fluid obliquely into the slot and at a shallow discharge angle from the slot along the second side. The holes are also disposed in converging pairs to impinge together in the slot the first fluid channeled therethrough. In a preferred embodiment, the slot has an aft surface including a plurality of longitudinally spaced apart grooves extending from the holes to the wall second side.

US Patent:

49303180, Jun 5, 1990

Filed:

May 5, 1989

Appl. No.:

7/348322

Inventors:

Steven J. Brzozowski - Scotia NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F25B 1900

US Classification:

62 511

Abstract:

Demountable cryocoller cold heads must make reliable contacts having low thermal resistance at cryogenic temperatures for cooling such devices as radiation shields used in superconducting magnets. Cryostat vacuum and a bellows is utilized in order to engage the cold head second stage interface, while the first stage interface is independently engaged by means of a bolted flange and a bellows. A soft metal such as indium is employed at the contact surfaces of the heat stations.

US Patent:

48132446, Mar 21, 1989

Filed:

Oct 19, 1987

Appl. No.:

7/109650

Inventors:

Steven J. Brzozowski - Scotia NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F25B 1900

US Classification:

62514R

Abstract:

Retractable cryogenic leads for superconducting magnets are provided for making low resistance contacts at liquid helium temperature reliably in the presence of heavy frost. A tube defining a bayonet socket on one end extends through a vertical stack cover of a cryostat insert to engage and disengage a vertical terminal rod having a transverse pin. A copper rod is slidable mounted inside the tube and is vertically displaced relative to the tube by a hydraulic actuator having a housing secured on the other end of the tube. A piston is slidably mounted in the housing. After the bayonet socket engages the pin of the vertical terminal rod, the piston when extended from the housing can force the copper rod against the top of the vertical terminal rod.

US Patent:

59758503, Nov 2, 1999

Filed:

Dec 23, 1996

Appl. No.:

8/772635

Inventors:

Nesim NMN Abuaf - Niskayuna NY
Steven Joseph Brzozowski - Scotia NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

B63H 114

US Classification:

416 97R

Abstract:

A turbine blade including an airfoil section having contoured surface geometries between the consecutive ribs or turbulators on the leading edge passage walls is described. The contoured surface geometries increase the overall heat transfer surface area between adjacent ribs as compared to the heat transfer surface area of a smooth inter-rib wall. The contoured surface geometries do not, however, change the overall serpentine passage geometry or the large scale flow characteristics of the turbulated cooling passageways. The contoured surface geometries may have many different geometries (e. g. , triangular, conical, semi-cylindrical, cylindrical columns or indentations in the side wall such as semi-circular dimples).

US Patent:

49266462, May 22, 1990

Filed:

Apr 10, 1989

Appl. No.:

7/335268

Inventors:

Bizhan Dorri - Clifton Park NY
Steven J. Brzozowski - Scotia NY

Assignee:

General Electric Company - Schenectady NY

International Classification:

F25B 1900

US Classification:

62 511

Abstract:

A precooler with a geometry that permits it to be mounted in a cryocooler interface and to use the same thermal connections at the heat stations is provided. The precooler has two stages each with its own heat exchanger, thermally isolated from the other. The latent heat of evaporation of cryogenic liquids is used to remove the sensible heat of superconductive magnet. The different stages can be cooled at a controlled rate resulting in reduced temperature gradients and therefore lower thermal stresses.