Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 3741-3760 of 9564
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Flame Structure and Combustion Capability of Non Premixed Rifled Nozzles
(The American Society of Mechanical Engineers (ASME), 2013)The target of this study is to promote combustion capability using a novel rifled nozzle which was set at the outlet of a conventional (unrifled) combustor. The rifled nozzle was utilized to adjust the flow swirling intensity ... -
An Integrated Approach for Aircraft Engine Performance Estimation and Fault Diagnostics
(The American Society of Mechanical Engineers (ASME), 2013)A Kalman filterbased approach for integrated online aircraft engine performance estimation and gas path fault diagnostics is presented. This technique is specifically designed for underdetermined estimation problems where ... -
Effects of Advanced Engine Technology on Open Rotor Cycle Selection and Performance
(The American Society of Mechanical Engineers (ASME), 2013)Recent increases in fuel prices and increased focus on aviation's environmental impacts have reignited focus on the open rotor engine concept. This type of architecture was extensively investigated in previous decades but ... -
Jet Surface Interaction Test: Far Field Noise Results
(The American Society of Mechanical Engineers (ASME), 2013)Many configurations proposed for the next generation of aircraft rely on the wing or other aircraft surfaces to shield the engine noise from the observers on the ground. However, the ability to predict the shielding effect ... -
Rotordynamics of a Two Phase Flow Twin Screw Pump
(The American Society of Mechanical Engineers (ASME), 2013)Twin screw pumps are positive displacement machines. Two meshing screws connected by timing gears push the fluid trapped in the screw cavities axially from suction to discharge. Available steady state hydraulic models ... -
One Explanation for Two Times Running Speed Response Due to Misalignment in Rotors Connected by Flexible Couplings
(The American Society of Mechanical Engineers (ASME), 2013)Misalignment in turbomachinery is commonly thought to produce twotimes runningspeed (2N) response. The source of 2N vibration response was investigated, starting with the development of finiteelement models for three ... -
Modified Single Fluid Cavitation Model for Pure Diesel and Biodiesel Fuels in Direct Injection Fuel Injectors
(The American Society of Mechanical Engineers (ASME), 2013)A cavitation model has been developed for the internal twophase flow of diesel and biodiesel fuels in fuel injectors under high injection pressure conditions. The model is based on the singlefluid mixture approach with ... -
Slow Roll of 40 MW Condensing Extraction Steam Turbines in a 420 MW Cogeneration Plant
(The American Society of Mechanical Engineers (ASME), 2013)This paper describes efforts required to operate a cogeneration facility's extractioncondensing steam turbine generators with flexible rotor design on a slowroll mode of operation (also called true standby). Slowroll mode ... -
Convective Heat Transfer and Pressure Loss in Rectangular Ducts With Inclined Pin Fin on a Wavy Endwall
(The American Society of Mechanical Engineers (ASME), 2013)Local endwall heat transfer characteristics and overall pressure loss of normal and inclined pin fins arrayed in rectangular ducts with flat and wavy endwalls have been investigated to improve the cooling efficiency of jet ... -
Manufacturing Experience in an Advanced 9%CrMoCoVNbNB Alloy for Ultra Supercritical Steam Turbine Rotor Forgings and Castings
(The American Society of Mechanical Engineers (ASME), 2013)Advanced 9–12%Cr martensitic stainless steels to enable extension of steam turbine operating temperatures beyond 565 آ°C have been under development since the 1980s. Steam turbines with operating temperatures approaching ... -
The Low Load Limit of Gasoline Partially Premixed Combustion Using Negative Valve Overlap
(The American Society of Mechanical Engineers (ASME), 2013)Partially premixed combustion has the potential of high efficiency and simultaneous low soot and NOx emissions. Running the engine in partially premixed combustion mode with high octane number fuels has the advantage of a ... -
Numerical Experimental Confrontation in the Simulation of Tool/Abradable Material Interaction
(The American Society of Mechanical Engineers (ASME), 2013)In turbomachinery, depositing abradable coatings along the circonference of casings is recognized as a robust solution which combines the adjustment of operating clearances with the reduction of nonrepairable damages ... -
A Literature Review of Low Pressure Steam Turbine Exhaust Hood and Diffuser Studies
(The American Society of Mechanical Engineers (ASME), 2013)This paper summarizes the findings from research studies carried out over the last 30 years, to better understand the flows in steam turbine low pressure exhaust hoods and diffusers. The work aims to highlight the areas ... -
Comparison of Piston Temperature Measurement Methods: Templugs Versus Wireless Telemetry With Thermocouples
(The American Society of Mechanical Engineers (ASME), 2013)The objective of this investigation was to compare the results of metallurgical temperature sensors and thermocouples when used to measure piston temperatures in a running engine. Type J thermocouples and a microwave ... -
Development and Implementation of the Advanced Environmental Burner for the Alstom GT13E2
(The American Society of Mechanical Engineers (ASME), 2013)Increasing public awareness and more stringent legislation on pollutants drive gas turbine manufacturers to develop combustion systems with low NOx emissions. In combination with this demand, the gas turbines have to provide ... -
Pitfalls for Accurate Steady State Port Flow Simulations
(The American Society of Mechanical Engineers (ASME), 2013)Steadystate port flow simulations were carried out with a commercial threedimensional (3D) computational fluid dynamics (CFD) code using Cartesian mesh with cut cells to study the prediction accuracy. The accuracy is ... -
Nonlinear Phenomena in Thermoacoustic Systems With Premixed Flames
(The American Society of Mechanical Engineers (ASME), 2013)Nonlinear analysis of thermoacoustic instability is essential for the prediction of the frequencies, amplitudes, and stability of limit cycles. Limit cycles in thermoacoustic systems are reached when the energy input from ... -
The Application of Rotary Vane Expanders in Organic Rankine Cycle Systems—Thermodynamic Description and Experimental Results
(The American Society of Mechanical Engineers (ASME), 2013)Small (10–100 kW) and micro (0.5–10 kW) Organic Rankine Cycle (ORC) power systems are nowadays considered for local and domestic power generation. Especially interesting are micropower applications for heat recovery ... -
Hybrid Model Based Fault Detection and Diagnosis for the Axial Flow Compressor of a Combined Cycle Power Plant
(The American Society of Mechanical Engineers (ASME), 2013)This technical brief is focused on the research area of fault detection and diagnosis in a complex thermodynamical system: in this case, an axial flow compressor. Its main contribution is a new approach which combines a ... -
Aerodynamic Optimization of High Pressure Turbines for Lean Burn Combustion System
(The American Society of Mechanical Engineers (ASME), 2013)Modern leanburn combustors make use of high flow swirl to maintain flame stability. The swirling flow can persist downstream of the turbine first vane, changing the loading on the rotor, leading to a reduction in efficiency. ...