Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2061-2080 of 9564
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Continuous Closed-Loop Transonic Linear Cascade for Aerothermal Performance Studies in Microturbomachinery
(The American Society of Mechanical Engineers (ASME), 2018)The present work summarizes the design process of a new continuous closed-loop hot transonic linear cascade. The facility features fully modular design which is intended to serve as a test bench for axial microturbomachinery ... -
Cold-Start Computational Fluid Dynamics Simulation of Spark-Ignition Direct-Injection Engine
(The American Society of Mechanical Engineers (ASME), 2018)Reliably starting the engine during extremely cold ambient temperatures is one of the largest calibration and emissions challenges in engine development. Although cold-start conditions comprise only a small portion of an ... -
Variable Geometry Compressors for Heavy Duty Truck Engine Turbochargers
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents the development approach, design, and evaluation of three turbocharger compressors with variable geometry for heavy duty engines. The main goal is the improvement of fuel economy without sacrifices ... -
Numerical Investigation on Mixture Formation in a Turbocharged Port-Injection Natural Gas Engine Using Multiple Cycle Simulation
(The American Society of Mechanical Engineers (ASME), 2018)In the present study, multidimensional computational fluid dynamics (CFD) simulations were carried out to study mixture formation in a turbocharged port-injection natural gas engine. In order to achieve robust simulation ... -
Flow Characteristics of Double Serpentine Convergent Nozzle With Different Inlet Configuration
(The American Society of Mechanical Engineers (ASME), 2018)Serpentine nozzles have been used in stealth fighters to increase their survivability. For real turbofan aero-engines, the existence of the double ducts (bypass and core flow), the tail cone, the struts, the lobed mixers, ... -
Intentional Response Reduction by Harmonic Mistuning of Bladed Disks With Aerodynamic Damping
(The American Society of Mechanical Engineers (ASME), 2018)A harmonic mistuning concept for bladed disks is analyzed in order to intentionally reduce the forced response of specific modes below their tuned amplitude level. By splitting a mode pair associated with a specific nodal ... -
Spray–Wall Interactions in a Small-Bore, Multicylinder Engine Operating With Reactivity-Controlled Compression Ignition
(The American Society of Mechanical Engineers (ASME), 2018)Experimental work on reactivity-controlled compression ignition (RCCI) in a small-bore, multicylinder engine operating on premixed iso-octane, and direct-injected n-heptane has shown an unexpected combustion phasing advance ... -
Impact of Bearing Clearance on Measured Stiffness and Damping Coefficients and Thermal Performance of a High-Stiffness Generation 3 Foil Journal Bearing
(The American Society of Mechanical Engineers (ASME), 2018)High-speed foil bearings are currently used in increasingly demanding, high performance applications. The application under consideration is a 120 krpm natural gas turboexpander-compressor, which requires 38 mm (1.5 in.) ... -
Working-Fluid Replacement in Supersonic Organic Rankine Cycle Turbines
(The American Society of Mechanical Engineers (ASME), 2018)In this paper, the effect of working-fluid replacement within an organic Rankine cycle (ORC) turbine is investigated by evaluating the performance of two supersonic stators operating with different working fluids. After ... -
Research on Control Strategy of Integrated Gasification Humid Air Turbine Cycle
(The American Society of Mechanical Engineers (ASME), 2018)Integrated gasification humid air turbine (IGHAT) cycle is an advanced power generation system, combining gasification technology and humid air turbine (HAT) cycle. It draws great attention in the energy field considering ... -
Evaluation of Property Methods for Modeling Direct-Supercritical CO2 Power Cycles
(The American Society of Mechanical Engineers (ASME), 2018)Direct supercritical carbon dioxide (sCO2) power cycles are an efficient and potentially cost-effective method of capturing CO2 from fossil-fueled power plants. These cycles combust natural gas or syngas with oxygen in a ... -
Three-Dimensional Vibration of the Crankshaft of a Large Marine Diesel Engine Under a Mixed Thermo-Elastic-Hydro-Dynamic Lubrication Coupling Between Flexible Crankshaft and Engine Block
(The American Society of Mechanical Engineers (ASME), 2018)To predict the vibration characteristics of the crankshaft of the larger marine diesel engine accurately and comprehensively, based on the finite element models of the crankshaft and the engine block reduced by a component ... -
High-Speed Imaging of Forced Ignition Kernels in Nonuniform Jet Fuel/Air Mixtures
(The American Society of Mechanical Engineers (ASME), 2018)This paper describes experimental measurements of forced ignition of prevaporized liquid fuels in a well-controlled facility that incorporates nonuniform flow conditions similar to those of gas turbine engine combustors. ... -
Optimizing the Performance of Swirl Recovery Vane on Fokker 29 Propeller Using Design of Experiments Method
(The American Society of Mechanical Engineers (ASME), 2018)The swirl recovery vane (SRV) oriented in the slipstream of the propeller can in principle recover the swirl effect and thus would improve the propulsion performance in terms of thrust production and propulsive efficiency. ... -
Integral Pumping Devices for Dual Mechanical Seals: Hydraulic Performance Generalization Using Dimensional Analysis
(The American Society of Mechanical Engineers (ASME), 2018)An experimental study is carried out investigating hydraulic performance for various designs of dual-mechanical-seal cartridges with integral pumping-rings. The tested devices are classified into two main families: radial-flow ... -
Real-Time Variable Geometry Triaxial Gas Turbine Model for Hardware-in-the-Loop Simulation Experiments
(The American Society of Mechanical Engineers (ASME), 2018)This paper proposes a hybrid method (HMRC) comprised of a radial basis function (RBF) neural net algorithm and component-level modeling method (CMM) as a real-time simulation model for triaxial gas turbines with variable ... -
Redesign of a Compressor Stage for a High-Performance Electric Supercharger in a Heavily Downsized Engine
(The American Society of Mechanical Engineers (ASME), 2018)Engine downsizing is a modern solution for the reduction of CO2 emissions from internal combustion engines. This technology has been gaining increasing attention from industry. In order to enable a downsized engine to ... -
Ceramic Matrix Composite Materials for Engine Exhaust Systems on Next-Generation Vertical Lift Vehicles
(The American Society of Mechanical Engineers (ASME), 2018)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 ... -
Partially Premixed Combustion Application for Diesel Power Improvement
(The American Society of Mechanical Engineers (ASME), 2018)A partially premixed combustion (PPC) approach was applied in a single cylinder diesel research engine in order to characterize engine power improvements. PPC is an alternative advanced combustion approach that generally ... -
Effect of Fuel Reactivity on Ignitability and Combustion Phasing in a Heavy-Duty Engine Simulation for Mixing-Controlled and Partially Premixed Combustion
(The American Society of Mechanical Engineers (ASME), 2018)Light-end fuels have recently garnered interest as potential fuel for advanced compression ignition (CI) engines. This next generation of engines, which aim to combine the high efficiency of diesel engines with the relative ...