Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1401-1420 of 9564
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Development of a Multiphase Flamelet Generated Manifold for Spray Combustion Simulations
(The American Society of Mechanical Engineers (ASME), 2021)In this study, a model flame of quasi-one-dimensional (1D) counterflow spray flame has been developed. The two-dimensional (2D) multiphase convection-diffusion-reaction equations have been simplified to one dimension using ... -
Experimental Evaluation of Dynamic Characteristics of Circular Arc Spring Dampers for Rotating Machinery
(The American Society of Mechanical Engineers (ASME), 2021)This study presents an experimental evaluation of the dynamic characteristics of the circular arc spring damper (CASD), which attenuates the vibration of rotating machinery. The CASD is a novel type of fluid film damper ... -
Experimental and Numerical Analysis of Gas Premix Turbulent Flames Stabilized in a Swirl Burner With Central Bluff Body
(The American Society of Mechanical Engineers (ASME), 2021)Lean premixed gas turbulent flames stabilized in the flow generated by an industrial swirl burner with a central bluff body are experimentally found to behave bistable. This bistable behavior, which can be triggered via a ... -
Pressurized SOFC System Fuelled by Biogas: Control Approaches and Degradation Impact
(The American Society of Mechanical Engineers (ASME), 2021)This paper shows control approaches for managing a pressurized solid oxide fuel cell (SOFC) system fuelled by biogas. This is an advanced solution to integrate the high efficiency benefits of a pressurized SOFC with a ... -
Simulation of Optimizing the Partial Load Performance of a Gas Turbine Combined Cycle Using Exhaust Heat Recuperation and Inlet Bleed Heating
(The American Society of Mechanical Engineers (ASME), 2021)This paper proposes a novel method to extend the operating range and improve the partial load efficiency of the gas turbine combined cycle (GTCC). The combination of exhaust heat recuperation and inlet bleed heating (IBH) ... -
Measurement and Analysis of Buoyancy-Induced Heat Transfer in Aero-Engine Compressor Rotors
(The American Society of Mechanical Engineers (ASME), 2021)The flow inside cavities between corotating compressor disks of aero-engines is driven by buoyancy, with Grashof numbers exceeding 1013. This phenomenon creates a conjugate problem: the Nusselt numbers depend on the radial ... -
Study on Intelligent Control of Gas Turbines for Extending Service Life Based on Reinforcement Learning
(The American Society of Mechanical Engineers (ASME), 2021)Frequent changes in operating conditions can result in the great loss of the service life of gas turbines that work at high speed, high pressure, and high temperature. To improve the control system of gas turbines is of ... -
A Degradation Diagnosis Method for Gas Turbine—Fuel Cell Hybrid Systems Using Bayesian Networks
(The American Society of Mechanical Engineers (ASME), 2021)This paper aims to develop and test Bayesian belief network-based diagnosis methods, which can be used to predict the most likely degradation levels of turbine, compressor, and fuel cell (FC) in a hybrid system based on ... -
Neural Network Prediction of Boundary Layer Flashback
(The American Society of Mechanical Engineers (ASME), 2021)Flashback is a major concern for engine operation and safety, particularly with progress toward renewably producible and cleaner-burning fuels, such as hydrogen fuel blends. This work extends prior progress in developing ... -
Multiwave Vibrations in Mistuned Cascades With Tip-Shroud Friction
(The American Society of Mechanical Engineers (ASME), 2021)Measurements taken during aero engine tests and in the field showed that flutter vibrations of shrouded blades can feature rich wave content (multiwave flutter vibrations). In a previous work, we demonstrated that this ... -
Effect of High Pressures on the Formation of Nitric Oxide in Lean, Premixed Flames
(The American Society of Mechanical Engineers (ASME), 2021)Increasingly stringent regulations are imposed on nitrogen oxides emissions due to their numerous negative impacts on human health and the environment. Accurate, experimentally validated thermochemical models are required ... -
Intermittency, Secondary Bifurcation and Mixed-Mode Oscillations in a Swirl-Stabilized Annular Combustor: Experiments and Modeling
(The American Society of Mechanical Engineers (ASME), 2021)We experimentally study thermoacoustic transitions in an annular combustor consisting of sixteen premixed, swirl-stabilized turbulent flames. We show the changes in the characteristics of bifurcations leading to the state ... -
Monitoring Damage in Nonoxide Composites at High Temperatures Using Carbon-Containing CVD SiC Monofilament Fibers as Embedded Electrical Resistance Sensors
(The American Society of Mechanical Engineers (ASME), 2021)Electrical resistance (ER) has become a technique of interest for monitoring SiC-based ceramic composites. The typical constituents of SiC fiber-reinforced SiC matrix composites, SiC, Si, and/or C, are semiconducive to ... -
Heat Transfer Analysis in a Rotating Cavity With Axial Through-Flow
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents local Nusselt numbers computed from experimental measurements of surface temperature of compressor disks in a multiple rotating cavity test rig with axial throughflow. A validated two-dimensional (2D) ... -
Study on Flow and Heat Transfer Characteristics of a New-Proposed Alternating Elliptical U-Channel in the Midchord Region of Gas Turbine Blade
(The American Society of Mechanical Engineers (ASME), 2021)This paper proposed an alternating elliptical U-bend cooling channel, which can be applied in the midchord region of gas turbine blade and manufactured by precision casting, based on the optimal flow field structure deduced ... -
Energetically Consistent Computation of Combustor Stability With a Model Consisting of a Helmholtz Finite Element Method Domain and a Low-Order Network
(The American Society of Mechanical Engineers (ASME), 2021)An efficient approach for the detection of the acoustic damping of gas turbine combustors is the combination of spatially resolved finite element method (FEM) approaches based on the Helmholtz equation with low-order ... -
Numerical Investigations on the Leakage Flow Characteristics of Brush Seal Based on the Three-Dimensional Staggered Tube Bundle Model
(The American Society of Mechanical Engineers (ASME), 2021)To accurately predict the leakage flow and resistance characteristics of brush seals, the multiblock structured mesh and the mesh motion technique are applied to the three-dimensional (3D) staggered tube bundle model of ... -
Structural Dynamic and Inherent Damping Characterization of Additively Manufactured Airfoil Components
(The American Society of Mechanical Engineers (ASME), 2021)The push for low cost and higher performance/efficient turbine engines has introduced a demand for novel technologies to improve robustness to vibrations resulting in high cycle fatigue (HCF). There have been many proposed ... -
Low-Cycle Fatigue Life of Continuously Cyclic-Hardening Material
(The American Society of Mechanical Engineers (ASME), 2021)A general fatigue life equation is derived by modifying the Tanaka-Mura-Wu dislocation pile-up model for variable strain-amplitude fatigue processes, where the fatigue crack nucleation life is expressed in terms of the ... -
DGEN Aeropropulsion Research Turbofan Core/Combustor-Noise Measurements—Experiment and Modal Structure at Core-Nozzle Exit1
(The American Society of Mechanical Engineers (ASME), 2021)Data from a recent core/combustor-noise source-diagnostic test (SDT) utilizing a small turbofan engine are analyzed. The campaign continued the exploration begun in a baseline test, but with more extensive acoustic ...