Siemens Aktiengesellschaft

Siemens Energy, Inc.

Siemens Westinghouse Power Corporation

Joseph Scott Markovitz

Charalambos Polyzopoulos

Stephen A Ramier

Richard L Thackway

Daniel W Garan

Kevin J Spence

David P Holzapfel

David Marchant Parker

Reinhard Schilp

David M Ritland

Vinayak V Barve

Erick J Deane

Khalil Farid Abou-Jaoude

Blake R Cotten

Urmi B Dave

Vaidyanathan Krishnan

Margery Norcom Hilburn

Michael C Escandon

Jaishree Sharma

An improved combustion section for a gas turbine engine is disclosed. A fuel nozzle includes new features which provide improved injection patterns of oil fuel and cooling water, resulting in better control of combustion gas temperature and NOx emissions, and eliminated impingement of cooling water on walls of the combustor. A new combustor includes a plate-fin design which provides improved cooling, while the combustor also makes more efficient use of available cooling air and has an improved component life. A new transition component has a smoother shape which reduces stagnation of combustion gas flow and impingement of combustion gas on transition component walls, improved materials and localized thickness increases for better durability, and improved cooling features for more efficient usage of cooling air.

W501D5/D5A DF42 combustion system

A cross-flame duct for connecting adjacent combustors together in a gas turbine to guard against flameout conditions within the combustors, whereby the cross-flame duct includes first and second ducts forming a slip joint to prevent stress from developing within the cross-flame duct is disclosed. The cross-flame duct remains flexible during turbine operation due to the slip joint, thereby preventing damaging thermal and mechanical stresses from developing within the cross-flame duct and enhancing the useful life of the cross-flame duct and associated components. The first and second ducts include cooling chambers positioned between outer sleeves and inner housings and maintained with one or more standoffs to reduce thermal stress and gradients or prevent material loss due to overheating or burning. The cooling chambers are supplied with cooling fluids via one or more fluid ports extending through the outer sleeves enabling air to flow through the cooling chambers and into the combustors.

Cross ignition flame duct

An acoustically dampened gas turbine engine () having a gas turbine engine combustor () with an acoustic damping resonator system () is disclosed. The acoustic damping resonator system () may be formed from one or more resonators () formed from a resonator housing () positioned within the gas turbine engine combustor () at an outer housing () forming a combustor basket () and extending circumferentially within the combustor (). In at least one embodiment, the resonator housing () may include resonator chambers () that may be welded in place within resonator chamber () receivers () but easily replaceable without exposing the resonator housing () to damage. In another embodiment, an inner surface () of the resonator chamber () may be offset radially outward from an inner surface () of the resonator housing (), thereby creating a flow-path discontinuity and reducing heating of the resonator chamber (). The acoustic damping resonator system () may mitigate dynamics thereby increasing an engine operating envelope and decreasing emissions.

Acoustic damping system for a combustor of a gas turbine engine

A combustion system has a diffusion flame pilot assembly and a steam delivery assembly. The diffusion flame pilot assembly has a fuel line with a downstream end terminating at a pilot nozzle. The steam delivery assembly has a steam line terminating at a steam outlet proximate to said fuel line and upstream of said pilot nozzle for directing steam to the pilot nozzle. An aspect of the invention has a steam throttle valve for adjusting the steam flow to the pilot nozzle based on the combustion system's NO.sub.X emissions and/or characteristics of said pilot fuel stream.

Pilot nozzle steam injection for reduced NO.sub.x emissions, and method

Growing community of inventors

Sanford, FL, United States of America

Joseph Scott Markovitz