Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1281-1300 of 9564
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Near Tip Loss Control With a Winglet Baffle Cavity Tip in a Turbine Cascade
(The American Society of Mechanical Engineers (ASME), 2021)The aerodynamic performance of a winglet baffle cavity tip is investigated at different inlet incidences from −12.5 to +12.5 deg. This blade tip shows a geometry feature with a pressure side winglet and a baffle within the ... -
The Data-Driven Surrogate Model-Based Dynamic Design of Aeroengine Fan Systems
(The American Society of Mechanical Engineers (ASME), 2021)High-cycle fatigue failures of fan blade systems due to vibrational loads are of great concern in the design of aeroengines, where energy dissipation by the relative frictional motion in the dovetail joints provides the ... -
The Influence of Needle Eccentric Motion on Hole-to-Hole Injection Characteristics of a Two-Layered Eight-Hole Diesel Injector
(The American Society of Mechanical Engineers (ASME), 2021)The stringent emission regulations diesel engines are required to meet have resulted in the usage of multihole and ultramultihole injectors, nowadays. In this research study, a double-layered eight-hole diesel injection ... -
An Ensemble of Recurrent Neural Networks for Real Time Performance Modeling of Three-Spool Aero-Derivative Gas Turbine Engine
(The American Society of Mechanical Engineers (ASME), 2021)Gas turbine is a complex system operating in nonstationary operation conditions for which traditional model-based modeling approaches have poor generalization capabilities. To address this, an investigation of a novel data ... -
Robust Design of a Fuel Cell—Turbocharger Hybrid System
(The American Society of Mechanical Engineers (ASME), 2021)Pressurized solid oxide fuel cell (SOFC) systems are a particularly attractive conversion technology for their high electric efficiency, potential for cogeneration applications, low carbon emissions, and high performance ... -
Leakage and Rotordynamic Characteristics for Three Types of Annular Gas Seals Operating in Supercritical CO2 Turbomachinery
(The American Society of Mechanical Engineers (ASME), 2021)The balance piston seal in multiple-stage centrifugal compressors and axial turbines sustains the largest pressure drop through the machines and therefore plays an important role in successful full load operation at high ... -
Construction of the Signal Profile for Use in Blade Tip-Timing Analysis
(The American Society of Mechanical Engineers (ASME), 2021)This paper illustrates a fundamentally different approach applied to blade tip-timing (BTT) analysis in the background of works performed through the long history of this method. New innovative approach is based on the ... -
Method for Determining the Change in Gas Turbine Firing Temperature
(The American Society of Mechanical Engineers (ASME), 2021)The maximum firing temperature of a gas turbine (GT) is limited by material constraints. Critical for the operation of the GT is the blade metal temperature, which is impacted by the heat transfer from the combustor outlet ... -
Experimental and Numerical Analysis of the Transient Behavior of the Oil Decongealing Process in an Aero Fuel-Cooled Oil Cooler Under Low-Temperature Conditions
(The American Society of Mechanical Engineers (ASME), 2021)The fuel-cooled oil cooler (FCOC) in the lubrication circuit plays a critical role in the aero gas-turbine engine's aerothermal management. However, the low temperature of the operating environment can congeal the oil and ... -
Part-Load Strategy Definition and Preliminary Annual Simulation for Small Size sCO2-Based Pulverized Coal Power Plant
(The American Society of Mechanical Engineers (ASME), 2021)In the near future, due to the growing share of variable renewable energy in the electricity mix and the lack of large-scale electricity storage, coal plants will have to shift their role from base-load operation to providing ... -
Experimental Results of Local Shear Stresses and Friction Torque in an Open Rotor-Stator Disk System
(The American Society of Mechanical Engineers (ASME), 2021)This contribution presents experimental investigations of friction torque in an open rotor–stator disk system by using two different measuring procedures. The first procedure is based on a thermo electrical wall shear ... -
Dynamic Modeling and Nonlinear Characteristics of a Cracked Bolt-Disk Combined Rotor System
(The American Society of Mechanical Engineers (ASME), 2021)Different from the crack on the rotating shaft, the crack on the bolt, which is a connecting part of the bolt-disk combined rotor, is a kind of local defect. The local crack on the bolt under high pretension is always in ... -
Computational and Experimental Analysis of a Compact Combustor Integrated Into a JetCat P90 RXi
(The American Society of Mechanical Engineers (ASME), 2021)Ultra compact combustors (UCCs) look to reduce the overall combustor length and weight in modern gas turbine engines. Previously, a UCC achieved self-sustained operation at subidle speeds in a JetCat P90 RXi turbine engine ... -
Implementation of Rectangular Vortex Generator Pairs to Improve Film Cooling Effectiveness on Transonic Rotor Blade Endwall
(The American Society of Mechanical Engineers (ASME), 2021)The rectangular vortex generator pairs (RVGPs) are arranged upstream of the film cooling holes to achieve better coolant coverage on the endwall near the pressure-side corner area. The endwall film cooling effectiveness ... -
An Accelerating Sweep Frequency Excitation Method for the Rotordynamic Coefficients Identification of Annular Gas Seals Based on Computational Fluid Dynamics
(The American Society of Mechanical Engineers (ASME), 2021)This article proposes a rotordynamic identification method using the accelerating sweep frequency excitation method. The computational fluid dynamics transient solution combined with the moving grid method is utilized to ... -
A New Design of a Pinwheel-Shaped High-G Combustor
(The American Society of Mechanical Engineers (ASME), 2021)High-g combustor (HGC) is a significant branch of the ultracompact combustor, an innovative gas turbine combustor with the ability to shorten the combustor length and improve engine efficiency. To improve the feasibility ... -
Conceptual Design and Energy Storage Positioning Aspects for a Hybrid-Electric Light Aircraft
(The American Society of Mechanical Engineers (ASME), 2021)This work is a feasibility study of a 19-passenger hybrid-electric aircraft, to serve the short-haul segment within the 200–600 nautical miles. Its ambition is to answer some dominating research questions, during the ... -
Comparing Global Spray Combustion Characteristics and Local Shot-to-Shot Variations in a Reacting n-Heptane Spray
(The American Society of Mechanical Engineers (ASME), 2021)In support of efforts to develop improved models of turbulent spray behavior and combustion in diesel engines, experimental data and analysis must be obtained for guidance and validation. For Reynolds-averaged Navier–Stokes ... -
A Transported Livengood–Wu Integral Model for Knock Prediction in Computational Fluid Dynamics Simulation
(The American Society of Mechanical Engineers (ASME), 2021)This work describes the development of a transported Livengood–Wu (L–W) integral model for computational fluid dynamics (CFD) simulation to predict autoignition and engine knock tendency. The currently employed L–W integral ... -
The Influence of Cycle-to-Cycle Hydrocarbon Emissions on Cyclic NO:NO2 Ratio From a HSDI Diesel Engine
(The American Society of Mechanical Engineers (ASME), 2021)Knowledge of the NO:NO2 ratio emitted from a diesel engine is particularly important for ensuring the highest performance of selective catalytic reduction (SCR) NOx after-treatment systems. As real driving emissions from ...