Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1561-1580 of 9564
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Laminar Flame Speed Experiments of Alternative Liquid Fuels
(The American Society of Mechanical Engineers (ASME), 2020)New laminar flame speed experiments have been collected for two alternative liquid fuels. Understanding the combustion characteristics of these synthetic fuels is an important step in developing new chemical kinetics ... -
Influence of Diesel Fuel Injection Characteristics on Dual-Fuel Combustion Modes in a Large-Bore, Medium-Speed Engine
(The American Society of Mechanical Engineers (ASME), 2020)Experiments were conducted on a large bore, medium speed, single cylinder, diesel engine to investigate operation with substitution ratio of natural gas (NG) varying from 0% to 93% by energy. In a previous study by the ... -
Impact of Wall Temperature in Large Eddy Simulation of Light-Round in an Annular Liquid Fueled Combustor and Assessment of Wall Models
(The American Society of Mechanical Engineers (ASME), 2020)The process of ignition in aero-engines raises many practical issues that need to be faced during the design process. Recent experiments and simulations have provided detailed insights into ignition in single-injector ... -
Experimental Comparison of Two Integer Valued Iterative Learning Control Approaches at a Stator Cascade
(The American Society of Mechanical Engineers (ASME), 2020)Experimental and simulative investigations have shown that active flow control (AFC) is an effective method to influence flow conditions within a compressor. This can be used for different cases like mitigating flow ... -
Toward a Better Understanding of Crack Growth in Nickel-Cast Alloys Under Creep-Fatigue and Thermo-Mechanical Fatigue Conditions
(The American Society of Mechanical Engineers (ASME), 2020)To ensure the feasibility of gas turbines, despite rising commodity prices and emission restrictions, an enhancement of both their efficiency and flexibility is necessary. The consequential higher loading of components at ... -
Design and Prototype Test Data for a 300 kW Active Magnetic Bearings-Supported Turbine Generator for Natural Gas Pressure Letdown
(The American Society of Mechanical Engineers (ASME), 2020)A 300 kW integrated and fully sealed turboexpander-generator for natural gas pressure letdown (PLD) was developed by Baker Hughes, a GE company (BHGE), in conjunction with Calnetix Technologies. This paper describes the ... -
Probabilistic Lifetime Assessment Approach of 2%-Cr Steel Considering Material and Loading Profile Scatter
(The American Society of Mechanical Engineers (ASME), 2020)In regions with high intermittent renewable energy share, thermal plants are forced to operate with greater flexibility beyond their original design intent. Decreasing energy prices and capacity factors will further force ... -
Thermoacoustic Spectrum of a Swirled Premixed Combustor With Partially Reflecting Boundaries
(The American Society of Mechanical Engineers (ASME), 2020)This study investigates the effect of partial acoustic reflection at inlet or outlet of a combustor on thermoacoustic stability. Parametric maps of the thermoacoustic spectrum are utilized for this purpose, which represent ... -
Simple Contact Stiffness Model Validation for Tie Bolt Rotor Design With Butt Joints and Pilot Fits
(The American Society of Mechanical Engineers (ASME), 2020)Tie bolt rotors for centrifugal compressors comprise multiple shaft components that are held together by a single tie bolt. The axial connections of these rotors—including butt joints, Hirth couplings, and Curvic ... -
Examining the Effect of Geometry Changes in Industrial Fuel Injection Systems on Hydrodynamic Structures With BiGlobal Linear Stability Analysis
(The American Society of Mechanical Engineers (ASME), 2020)Shape optimization with respect to the suppression or enhancement of dynamical flow structures is an important topic in combustion research and beyond. In this paper, we investigate the flow in an industrial fuel injection ... -
Exergy and NOx Emission-Based Ecological Performance Analysis of the Scimitar Engine
(The American Society of Mechanical Engineers (ASME), 2020)Scimitar engine is a hypersonic hybrid engine designed to propel the LAPCAT A2 aircraft. In this study, a novel exergy and NOx emission-based ecological performance analysis of the engine is performed. For this purpose, ... -
Experimental and Numerical Investigation on the Influence of Thermally Induced Stress Gradients on Fatigue Life of the Nickel-Base Alloy Mar-M247
(The American Society of Mechanical Engineers (ASME), 2020)Today's and future parameters of stationary gas turbines and aircraft engines require intensive and highly efficient cooling of hot gas path components. High temperature and thermally induced stress gradients with impact ... -
Semikinetic Model for Acid Dew Point Prediction in an Engine Cylinder
(The American Society of Mechanical Engineers (ASME), 2020)In this work, a simplified kinetic model of the SO3 generation reaction is proposed with a test diesel engine, and the semikinetic model was further developed and applied to predict the acid dew point (ADP) temperature. ... -
Development of Gasoline Direct Injection Engine for Improving Brake Thermal Efficiency Over 44%
(The American Society of Mechanical Engineers (ASME), 2020)This study demonstrates the effects of technologies applied for the development of gasoline direct injection (GDI) engine for improving the brake thermal efficiency (BTE). The test engine has a relatively high stroke to ... -
Study on Altitude Adaptability of a Turbocharged Off-Road Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2020)This paper investigates the operating characteristics of an off-road diesel engine to enhance its power performance in plateau. First, the impacts of altitude on the power, fuel economy, and emissions characteristics were ... -
On the Effects of Injection Strategy, Exhaust Gas Recirculation, and Intake Boost on TSCI With Wet Ethanol
(The American Society of Mechanical Engineers (ASME), 2020)Using a split injection of wet ethanol, where a portion of the fuel is injected during the compression stroke, has been shown to be an effective way to enable thermally stratified compression ignition (TSCI), an advanced ... -
Experimental Study of the Effect of Start of Injection and Blend Ratio on Single Fuel Reformate RCCI
(The American Society of Mechanical Engineers (ASME), 2020)A new concept of single fuel reactivity-controlled compression ignition (RCCI) has been proposed through the catalytic partial oxidation (CPOX) reformation of diesel fuel. The reformed fuel mixture is then used as the low ... -
Effect of Tip Clearance on the Aeroelastic Stability of a Wide-Chord Fan Rotor
(The American Society of Mechanical Engineers (ASME), 2020)This research presents a series of simulations that investigate the effects of tip clearance on the aeroelastic stability of a wide-chord high-speed transonic fan rotor. The results show that the stall margin and the total ... -
Simulation-Aided Development of Prechamber Ignition System for a Lean-Burn Gasoline Direct Injection Motor-Sport Engine
(The American Society of Mechanical Engineers (ASME), 2020)Due to recent regulation changes to restricted fuel usage in various motor-sport events, motor-sport engine manufacturers have started to focus on improving the thermal efficiency and often claim thermal efficiency figures ... -
Impact of Turbomachinery Degradation on Performance and Dynamic Behavior of Supercritical CO2 Cycle
(The American Society of Mechanical Engineers (ASME), 2020)Due to small footprint and high efficiency, a Supercritical CO2 (S-CO2) power cycle is considered to be one of the promising next-generation power cycles. Although S-CO2 is reported as a powerful cleaning agent, the ...