Journal of Engineering for Gas Turbines and Power

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Lean-Burn Stationary Natural Gas Engine Operation With a Prototype Laser Spark Plug
Journal of Engineering for Gas Turbines and Power - Tập 132 Số 7 - 2010
Dustin L. McIntyre, Steven D. Woodruff, J.S. Ontko
An end pumped passively Q-switched laser igniter was developed to meet the ignition system needs of large bore lean burn stationary natural gas engines. The laser spark plug used an optical fiber coupled diode pump source to axially pump a passively Q-switched Nd:YAG laser and transmit the laser pulse through a custom designed lens. The optical fiber coupled pump source permits the excitat...... hiện toàn bộ
Laser Ignition of Methane-Air Mixtures at High Pressures and Diagnostics
Journal of Engineering for Gas Turbines and Power - Tập 127 Số 1 - Trang 213-219 - 2005
Herbert Kopecek, Soren Charareh, Maximilian Lackner, Christian Forsich, Franz Winter, Johann Klausner, Gu ̈nther Herdin, Martin Weinrotter, E. Wintner
Methane-air mixtures at high fill pressures up to 30 bar and high temperatures up to 200°C were ignited in a high-pressure chamber with automated fill control by a 5 ns pulsed Nd:YAG laser at 1064 nm wavelength. Both, the minimum input laser pulse energy for ignition and the transmitted fraction of energy through the generated plasma were measured as a function of the air/fuel-equivalence ...... hiện toàn bộ
Synthesized Synchronous Sampling Technique for Differential Bearing Damage Detection
Journal of Engineering for Gas Turbines and Power - Tập 132 Số 7 - 2010
Huageng Luo, Hai Qiu, George Ghanime, Melinda Hirz, Geo Van Der Merwe
The differential bearing between the low-pressure turbine (LPT) and high-pressure turbine (HPT) shafts is one of the most vulnerable parts in a turbomachinery engine. Unfortunately, it is also one of the most difficult parts to monitor for damage existence signatures, because the signal-to-noise ratio at the normal sensor locations is extremely low. In addition, the speed variations in bot...... hiện toàn bộ
Ceramic Matrix Composite Materials for Engine Exhaust Systems on Next-Generation Vertical Lift Vehicles
Journal of Engineering for Gas Turbines and Power - Tập 140 Số 10 - 2018
Michael Walock, Vann Heng, Andy Nieto, Anindya Ghoshal, Muthuvel Murugan, Dan Driemeyer
Future gas turbine engines will operate at significantly higher temperatures (∼1800 °C) than current engines (∼1400 °C) for improved efficiency and power density. As a result, the current set of metallic components (titanium-based and nickel-based superalloys) will be replaced with ceramics and ceramic matrix composites (CMCs). These materials can survive the higher operating temperatures ...... hiện toàn bộ
Experimental Analysis of Confined Jet Flames by Laser Measurement Techniques
Journal of Engineering for Gas Turbines and Power - Tập 134 Số 4 - 2012
Oliver Lammel, Michael Stöhr, Peter Kutne, Claudiu Dem, Wolfgang Meier, Manfred Aigner
An experimental analysis of confined premixed turbulent methane/air and hydrogen/air jet flames is presented. A generic lab scale burner for high-velocity preheated jets equipped with an optical combustion chamber was designed and set up. The size and operating conditions were configured to enable flame stabilization by recirculation of hot combustion products. The geometry of the rectangu...... hiện toàn bộ
Description of a Semi-Independent Time Discretization Methodology for a One-Dimensional Gas Dynamics Model
Journal of Engineering for Gas Turbines and Power - Tập 131 Số 3 - 2009
J. Galindo, José Ramón Serrano, F.J. Arnau, Pedro Piqueras
Modeling has become an essential technique in design and optimization processes of internal combustion engines. As a consequence, the development of accurate modeling tools is, in this moment, an important research topic. In this paper, a gas-dynamics modeling tool is presented. The model is able to reproduce the global behavior of complete engines. This paper emphasizes an innovative feat...... hiện toàn bộ
Development and Turbine Engine Performance of Three Advanced Rhenium Containing Superalloys for Single Crystal and Directionally Solidified Blades and Vanes
Journal of Engineering for Gas Turbines and Power - Tập 120 Số 3 - Trang 595-608 - 1998
Robert W. Broomfield, D. A. Ford, J. K. Bhangu, Michelle Thomas, Donald J. Frasier, Phil S. Burkholder, K. Harris, G. L. Erickson, Jacqueline B. Wahl
Turbine inlet temperatures over the next few years will approach 1650°C (3000°F) at maximum power for the latest large commercial turbofan engines, resulting in high fuel efficiency and thrust levels approaching 445 KN (100,000 lbs.). High reliability and durability must be intrinsically designed into these turbine engines to meet operating economic targets and ETOPS certification requirem...... hiện toàn bộ
Crack Initiation in a Coated and an Uncoated Nickel-Base Superalloy Under TMF Conditions
Journal of Engineering for Gas Turbines and Power - Tập 120 Số 4 - Trang 792-795 - 1998
Peter K. Johnson, M. Arana, K. Ostolaza, J. Bressers
A thermomechanical fatigue (TMF) cycle, intended to represent aeroengine blade working conditions, was selected for carrying out tests on uncoated and aluminide coated SRR99 samples until test piece failure. Optical images of the surface of test pieces were collected during testing to monitor surface crack initiation and accompanying transformations. Using these images, surface changes wer...... hiện toàn bộ
A Study of Combustion Characteristics of Gasified Coal Fuel
Journal of Engineering for Gas Turbines and Power - Tập 123 Số 1 - Trang 22-32 - 2001
Takuya Hasegawa, Mikio Sato, Toshihiko Nakata
The development of integrated, coal-gasification combined cycle (IGCC) systems provides cost-effective and environmentally sound options for meeting future coal-utilizing power generation needs in the world. The Japanese government and the Electric Power Industries in Japan promoted research and development of an IGCC system. We have being working on developing a low-NOx combustion technol...... hiện toàn bộ
High Pressure Test Results of a Catalytically Assisted Ceramic Combustor for a Gas Turbine
Journal of Engineering for Gas Turbines and Power - Tập 121 Số 3 - Trang 422-428 - 1999
Yasushi Ozawa, Yoshihisa Tochihara, Nanako Mori, Isao Yuri, Tadahiro Kanazawa, Katsuhiro Sagimori
A catalytically assisted ceramic combustor for a gas turbine was designed to achieve low NOx emission under 5 ppm at a combustor outlet temperature over 1300°C. This combustor is composed of a burner system and a ceramic liner behind the burner system. The burner system consists of 6 catalytic combustor segments and 6 premixing nozzles, which are arranged in parallel and alternately. The c...... hiện toàn bộ
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