Douglas Clyde Rawlins

US Patent:

58264230, Oct 27, 1998

Filed:

Nov 13, 1996

Appl. No.:

8/751771

Inventors:

John F. Lockyer - San Diego CA
Gareth W. Oskam - San Diego CA
Douglas C. Rawlins - Murrieta CA

Assignee:

Solar Turbines Incorporated - San Diego CA

International Classification:

F02C 320
F02G 300

US Classification:

60 39463

Abstract:

A dual fuel injector for injecting liquid and/or gaseous fuel into a gas turbine engine includes a plurality of hollow spoke members for injecting gaseous fuel that are located upstream of a plurality of main air swirling vanes that are in turn upstream of a plurality of air-blast atomizers for injecting main liquid fuel. A pilot fueling arrangement is provided that is capable of starting the gas turbine engine using either gaseous or liquid fuel. The injector includes a labyrinth-shaped cooling passage capable of providing cooling air to cylindrical walls of an injector centerbody.

US Patent:

54679265, Nov 21, 1995

Filed:

Feb 10, 1994

Appl. No.:

8/194769

Inventors:

Dennis D. Idleman - Lakeside CA
Douglas C. Rawlins - Murrieta CA
Virendra M. Sood - Encinitas CA

Assignee:

Solar Turbines Incorporated - San Diego CA

International Classification:

F23D 1112
F23R 314

US Classification:

2391325

Abstract:

Past fuel injection nozzles have attempted to provide a structure to reduce tip temperatures. Such nozzles have failed to attain adequate reduction of tip temperatures without increasing the quantity of cooling air required. The present fuel injector structure has resulted in reduced tip temperatures without increasing the quantity of cooling air required. The structure includes a shell having an inner member positioned therein forming a first chamber therebetween, an end piece forming a second chamber between the inner member and the end piece. An inner body has a plurality of first angled passages formed therein and communicates between the second chamber and a passage. A flow of combustor air through the second chamber contacts an air side of the end piece resulting in a combustor side being cooled. The unique structure of the fuel injector nozzle provides improved tip cooling without increasing the quality of cooling air and improves the efficiency of the gas turbine engine.

US Patent:

57264112, Mar 10, 1998

Filed:

Oct 25, 1995

Appl. No.:

8/548165

Inventors:

Mario E. Abreu - Poway CA
Douglas C. Rawlins - Murrieta CA
Virendra M. Sood - Encinitas CA
James B. Sperling - El Cajon CA

Assignee:

Solar Turbines Incorporated - San Diego CA

International Classification:

B23K 2600

US Classification:

2191217

Abstract:

The present method of making a workpiece having a plurality of holes defined therein includes the plurality of holes defining a specific flow at a specific flow condition. The method of making the plurality of holes includes generally the steps of forming a first portion of holes having a first preestablished hole cross-sectional area being defined by a predetermined flow characteristic value of the first preestablished hole cross-sectional area at the specific flow condition; a cavity being formed; positioning a flow establishing device in communication with the cavity; positioning a flow measuring device in operative relationship with the flow establishing device; actuating the flow establishing device and establishing a flow through the first portion of holes; monitoring the flow; comparing the flow with the predetermined flow characteristic value; determining a flow requirement of a second portion of holes based on an accumulative predetermined flow characteristic value of the first and second portions of holes and the measured flow of the first portion of holes; conforming the forming device to a second predetermined hole cross-sectional area and forming the second portion of said plurality of holes having the second predetermined hole cross-sectional area; and repeating the aforementioned steps successively for the remaining portions of the plurality of holes until the required number of holes in the workpiece have been formed.