Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 2121-2140 of 9564
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On the Influence of Lubricant Supply Conditions and Bearing Configuration to the Performance of (Semi) Floating Ring Bearing Systems for Turbochargers
(The American Society of Mechanical Engineers (ASME), 2018)Engine oil-lubricated (semi) floating ring bearing ((S)FRB) systems in passenger vehicle turbochargers (TC) operate at temperatures well above ambient and must withstand large temperature gradients that can lead to severe ... -
Fractal Characteristics of Combustion Noise
(The American Society of Mechanical Engineers (ASME), 2018)Fractal analysis is undertaken to characterize flame surface fluctuations on an unconfined turbulent premixed flame and the resulting far-field acoustics fluctuations. Results indicate that combustion noise is monofractal ... -
Leakage, Drag Power, and Rotordynamic Force Coefficients of an Air in Oil (Wet) Annular Seal
(The American Society of Mechanical Engineers (ASME), 2018)Wet gas compression systems and multiphase pumps are enabling technologies for the deep sea oil and gas industry. This extreme environment determines both machine types have to handle mixtures with a gas in liquid volume ... -
A Computational Fluid Dynamics Modified Bulk Flow Analysis for Circumferentially Shallow Grooved Liquid Seals
(The American Society of Mechanical Engineers (ASME), 2018)In straight-through centrifugal pumps, a grooved seal acts as a balance piston to equilibrate the full pressure rise across the pump. As the groove pattern breaks the development of fluid swirl, this seal type offers lesser ... -
Decentralized Feedback Control of Pumping Losses and NOx Emissions in Diesel Engines
(The American Society of Mechanical Engineers (ASME), 2018)A novel decentralized control architecture is developed based on a feedback from the pressure difference across the engine which is responsible for the pumping losses and the exhaust gas recirculation (EGR) flow in diesel ... -
A Flow Starvation Model for Tilting Pad Journal Bearings and Evaluation of Frequency Response Functions: A Contribution Toward Understanding the Onset of Low Frequency Shaft Motions
(The American Society of Mechanical Engineers (ASME), 2018)Direct lubrication tilting pad journal bearings (TPJBs) require less oil flow, reduce power consumption, and offer cooler pad temperatures for operation at high surface speeds. Although apparently free of hydrodynamic ... -
Exergy Analysis and Performance Assessment for Different Recuperative Thermodynamic Cycles for Gas Turbine Applications
(The American Society of Mechanical Engineers (ASME), 2018)This work presents an exergy analysis and performance assessment of three recuperative thermodynamic cycles for gas turbine applications. The first configuration is the conventional recuperative (CR) cycle in which a heat ... -
Numerical Model of Liquid Film Formation and Breakup in Last Stage of a Low-Pressure Steam Turbine
(The American Society of Mechanical Engineers (ASME), 2018)Formation of thin liquid films on steam turbine airfoils, particularly in last stages of low-pressure (LP) steam turbines, and their breakup into coarse droplets is of paramount importance to assess erosion of last stage ... -
Dynamic Similarity in Turbine Deposition Testing and the Role of Pressure
(The American Society of Mechanical Engineers (ASME), 2018)The role of absolute pressure in deposition testing is reviewed from first principles. Relevant dimensionless parameters for deposition testing are developed and dynamic similarity conditions are assessed in detail. Criteria ... -
Physics-Based Dynamic Models of Three SOFC/GT Emulator Test Rigs
(The American Society of Mechanical Engineers (ASME), 2018)This paper presents the development, implementation, and validation of a simplified dynamic modeling approach to describe solid oxide fuel cell gas turbine (SOFC/GT) hybrid systems (HSs) in three real emulator test rigs ... -
Advanced Control for Clusters of SOFC/Gas Turbine Hybrid Systems
(The American Society of Mechanical Engineers (ASME), 2018)The use of model predictive control (MPC) in advanced power systems can be advantageous in controlling highly coupled variables and optimizing system operations. Solid oxide fuel cell/gas turbine (SOFC/GT) hybrids are an ... -
Direct and Indirect Noise Generated by Entropic and Compositional Inhomogeneities
(The American Society of Mechanical Engineers (ASME), 2018)Flow disturbances are generated inside a duct via pulsed injection of helium into a flow of air. This leads to the generation of an acoustic pulse (direct noise), as well as the production of entropic and compositional ... -
Static Load Performance of a Water-Lubricated Hydrostatic Thrust Bearing
(The American Society of Mechanical Engineers (ASME), 2018)In rotating equipment, thrust bearings aid to balance axial loads and control shaft position. In turbomachinery, axial loads depend on shaft speed and pressure rise/drop on the impellers. This paper details a water-lubricated ... -
Plastic Effects on High Cycle Fatigue at the Edge of Contact of Turbine Blade Fixtures
(The American Society of Mechanical Engineers (ASME), 2018)Slender turbine blades are susceptible to excitation. Resulting vibrations stress the blade's fixture to the rotor or stator. In this paper, high cycle fatigue at the edge of contact (EOC) between blade and rotor/stator ... -
Discussion: “Beyond Brayton Cycle: It is Time to Change the Paradigm” (S. Can Gülen, 2018, ASME J. Eng. Gas Turbine Power, 140(11), p. 111703)
(The American Society of Mechanical Engineers (ASME), 2018) -
Monte Carlo Simulation for Radiative Transfer in a High-Pressure Industrial Gas Turbine Combustion Chamber
(The American Society of Mechanical Engineers (ASME), 2018)Radiative heat transfer is studied numerically for reacting swirling flow in an industrial gas turbine burner operating at a pressure of 15 bar. The reacting field characteristics are computed by Reynolds-averaged Navier–Stokes ... -
Experimental Study of Thermo-Acoustic Instability Triggering in a Staged Liquid Fuel Combustor Using High-Speed OH-PLIF
(The American Society of Mechanical Engineers (ASME), 2018)A staged injector developed by JAXA and fueled with kerosene is studied in a high-pressure combustion experiment. With a stable pilot fuel flow rate, the fuel flow rate in the main stage is progressively increased. A ... -
Sources of Particulate Matter Emissions Variability From a Gasoline Direct Injection Engine
(The American Society of Mechanical Engineers (ASME), 2018)Particulate matter (PM) emissions from gasoline direct injection (GDI) engines are a concern due to the health effects associated with ultrafine PM. This experimental study investigated sources of PM emissions measurement ... -
Effect of the Aero-Engine Mounting Stiffness on the Whole Engine Coupling Vibration
(The American Society of Mechanical Engineers (ASME), 2018)A finite element (FE) model of the rotor tester of an aero-engine, having a thin-walled casing structure, mounted with the way of an actual engine, is developed to simulate the intrinsic vibration characteristics under ... -
Aerodynamic Effects of Tie-Boss in Extremely Long Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2018)Focus of this paper is aerodynamic investigation of tie-boss stabilization devices for extremely long rotor blades. This investigation covered measurements on multiple blade cascades and computational fluid dynamics (CFD) ...