Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1161-1180 of 9564
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Considerations for the Extension of Gas Path Analysis to Electrified Aircraft Propulsion Systems
(The American Society of Mechanical Engineers (ASME), 2021)Aircraft operators rely on gas path analysis techniques for monitoring the performance and health of their gas turbine engine assets. This is accomplished by analyzing discernable shifts in measurement parameters acquired ... -
Bearing Skidding Detection for High-Speed and Aero-Engine Applications
(The American Society of Mechanical Engineers (ASME), 2021)Rolling-element bearings (REB) can develop severe damage due to skidding (slipping) between the rolling elements and bearing races. Skidding can be described as gross sliding between the bearing surfaces in relative motion ... -
Optimum Multinozzle Configuration for Minimizing the Rayleigh Integral During High-Frequency Transverse Instabilities
(The American Society of Mechanical Engineers (ASME), 2021)This paper develops a formalism for optimizing nozzle location/configuration with respect to combustion stability of high-frequency transverse modes in a can combustor. The stability of these acoustically noncompact flames ... -
Effect of Pad Material, Copper Versus Steel, on the Performance of a Tilting Pad Journal Bearing: Measurements and Predictions
(The American Society of Mechanical Engineers (ASME), 2021)High-temperature operation limits the life of fluid film bearings -
Making Better Swirl Brakes Using Computational Fluid Dynamics: Performance Enhancement From Geometry Variation
(The American Society of Mechanical Engineers (ASME), 2022)A fluid with a large swirl (circumferential) velocity entering an annular pressure seal influences the seal cross-coupled dynamic stiffness coefficients, and hence it affects system stability. Typically comprising a large ... -
A Model for Tilting Pad Thrust Bearings Operating With Reduced Flow Rate—Do Benefits Outweigh Risks?
(The American Society of Mechanical Engineers (ASME), 2021)The literature on tilting pad thrust bearings (TPTB) calls for flow reduction as an effective means to reduce drag power losses as well as oil pumping costs. However, the highest level of flow reduction a bearing can undergo ... -
Design and Experimental Characterization of a Swirl-Stabilized Combustor for Low Calorific Value Gaseous Fuels
(The American Society of Mechanical Engineers (ASME), 2021)Low calorific value (LCV) gaseous fuels are generated as by-products in many commercial sectors, e.g., as mine gas or biogas. Their efficient exploitation can be a considerable source of primary energy. Typically, product ... -
A New Turbomachine for Clean and Sustainable Hydrocarbon Cracking
(The American Society of Mechanical Engineers (ASME), 2021)Decarbonizing highly energy-intensive industrial processes is imperative if nations are to comply with anthropogenic greenhouse gas emissions targets by 2050. This is a significant challenge for high-temperature industrial ... -
Fast Reconstruction Method of the Stress Field for the Steam Turbine Rotor Based on Deep Fully Convolutional Network
(The American Society of Mechanical Engineers (ASME), 2021)Since it is difficult to directly measure the transient stress of a steam turbine rotor in operation, a rotor stress field reconstruction model based on the deep fully convolutional network for the startup process is ... -
Accurate Interpolation of the Dependency of Modal Properties on the Rotation Speed for the Transient Response Analysis of Bladed Disks
(The American Society of Mechanical Engineers (ASME), 2021)During fast gas-turbine engine acceleration and deceleration, the transient vibration effects in bladed disk vibration become significant and the transient response needs to be calculated. In this paper, an effective method ... -
Development and Integration of the Dual Fuel Combustion System for the MGT Gas Turbine Family
(The American Society of Mechanical Engineers (ASME), 2021)Industrial gas turbines like the MGT6000 are often operated as power supply or as mechanical drives. In these applications, liquid fuels like “diesel fuel no. 2” can be used either as main fuel or as backup fuel if natural ... -
The Effects of Axisymmetric Convergent Contouring and Blowing Ratio on Endwall Film Cooling and Vane Pressure Side Surface Phantom Cooling Performance
(The American Society of Mechanical Engineers (ASME), 2021)To reduce the intensity of endwall secondary flow, the axisymmetric convergent contoured endwall is commonly designed in the first nozzle guide vane (NGV) passage of the real gas turbine engines. This endwall contouring ... -
A Study on Adapted Similitude Modeling Method of Turboexpander With Different Gas Working Fluids
(The American Society of Mechanical Engineers (ASME), 2021)The study on similitude modeling method of turboexpander with different working fluids is not only the key technical means and necessary method for the research and development of turboexpander with special working fluids ... -
Influence of Pulse Characteristics on Turbocharger Radial Turbine
(The American Society of Mechanical Engineers (ASME), 2021)Turbocharging has been demonstrated as a key technology to enhance fuel efficiency in the automotive field that faces increasingly stringent emission regulations. Due to the reciprocating engine, pulsating flow feds the ... -
Compressor Stability at Pulsating Condition Via Gas Dynamics Responses Analysis
(The American Society of Mechanical Engineers (ASME), 2021)The compressor is operated at unsteady exit conditions in many scenarios such as the instability of combustion in gas turbine and denotation engine. The aerodynamic stability of the compressor is inevitably influenced by ... -
Off-Design of a Pumped Thermal Energy Storage Based on Closed Brayton Cycles
(The American Society of Mechanical Engineers (ASME), 2021)The growth of renewable energy source requires reliable, durable, and cheap storage technologies. In this field, the pumped thermal energy storage (PTES) is drawing some interest as it appears not to be affected by ... -
Acoustic Pyrometry Robustness to Time-of-Flight Estimation Errors
(The American Society of Mechanical Engineers (ASME), 2021)Acoustic pyrometry is a widely used technique for contactless temperature measurement. It may be used in several applications, especially when high temperatures and harsh environments are involved. For instance, it has ... -
Impact of a Centerbody on the Unsteady Flow Dynamics of a Swirl Nozzle: Intermittency of Precessing Vortex Core Oscillations
(The American Society of Mechanical Engineers (ASME), 2021)The precessing vortex core (PVC) is a self-excited flow oscillation state occurring in swirl nozzles. This is caused by the presence of a marginally unstable hydrodynamic helical mode that induces precession of the vortex ... -
Impact of Hydrogen Addition on the Thermoacoustic Instability and Precessing Vortex Core Dynamics in a CH4/H2/Air Technically Premixed Combustor
(The American Society of Mechanical Engineers (ASME), 2021)We study the impact of H2 enrichment on the unsteady flow dynamics and thermoacoustic instability in the prediction and control of instabilities in industrial turbines (PRECCINSTA) swirl combustor. The experiments were ... -
Mistuning and Damping of a Radial Turbine Wheel. Part 1: Fundamental Analyses and Design of Intentional Mistuning Pattern
(The American Society of Mechanical Engineers (ASME), 2021)The radial turbine impeller of an exhaust turbocharger is analyzed in view of both free vibration and forced response. Due to random blade mistuning resulting from unavoidable inaccuracies in manufacture or material ...