Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 1341-1360 of 9564
-
Investigation of Fuel and Load Flexibility in a Siemens Gas Turbine-600/700/800 Burner Under Atmospheric Pressure Conditions Using High-Speed Hydroxyl-PLIF and Hydroxyl Radical Chemiluminescence Imaging
(The American Society of Mechanical Engineers (ASME), 2021)Fuel and load flexibility have been increasingly important features of industrial gas turbines in order to meet the demand for increased utilization of renewable fuels and to provide a way to balance the grid fluctuations ... -
Transient Aero-Thermo-Mechanical Multidimensional Analysis of a High Pressure Turbine Assembly Through a Square Cycle
(The American Society of Mechanical Engineers (ASME), 2021)Better understanding and more accurate prediction of heat transfer and cooling flows in aero engine components in steady and transient operating regimes are essential to modern engine designs aiming at reduced cooling air ... -
A New Harmonic Balance Approach Using Multidimensional Time
(The American Society of Mechanical Engineers (ASME), 2021)Over the past years, nonlinear frequency-domain methods have become a state-of-the-art technique for the numerical simulation of unsteady flow fields within multistage turbomachinery as they are capable of fully exploiting ... -
Deposition Pattern Analysis on a Fouled Multistage Test Compressor
(The American Society of Mechanical Engineers (ASME), 2021)Compressor fouling is one of the main causes of gas turbine performance degradation. Microsized particles adhere to the blade surfaces increasing the surface roughness and modifying the airfoil shape. In this work, the ... -
Analysis of Timewise Compressor Fouling Phenomenon on a Multistage Test Compressor: Performance Losses and Particle Adhesion1
(The American Society of Mechanical Engineers (ASME), 2021)The analysis of the performance losses of a multistage compressor concerning the air contaminant is not widespread in literature and, the mutual interactions of particle materials, air humidity, and compressor load are not ... -
Windmilling Characteristics of a Contra-Rotating Fan
(The American Society of Mechanical Engineers (ASME), 2021)In the present experimental study, a low aspect ratio, low hub-tip ratio contra-rotating axial fan is investigated to understand its performance under windmilling conditions. Two configurations are tested; in the first ... -
Comparative Assessment of Fouling Scenarios in an Axial Flow Compressor
(The American Society of Mechanical Engineers (ASME), 2021)It is commonly accepted that fouling degrades severely axial compressor performance. Deposits build up as operating hours sum up, causing a decrease in the compressor's delivery pressure, efficiency, and flow capacity. ... -
Theoretical and Experimental Investigation of a 34 Watt Radial-Inflow Steam Turbine With Partial Admission
(The American Society of Mechanical Engineers (ASME), 2021)A microsteam turbine with a tip diameter of 15 mm was designed and experimentally characterized. At the nominal mass flow rate and total-to-total pressure ratio of 2.3 kg h−1 and 2, respectively, the turbine yields a power ... -
Platform-Centered Reduction: A Process Capturing the Essentials for Blade-Damper Coupled Optimization
(The American Society of Mechanical Engineers (ASME), 2021)The purpose of this paper is to develop an attractive tool for designers in the initial design phase of the damping of turbomachinery blades through dry friction underplatform dampers. The paper shows how, to this purpose, ... -
A Model Reduction Method for Bladed Disks With Large Geometric Mistuning Using a Partially Reduced Intermediate System Model
(The American Society of Mechanical Engineers (ASME), 2021)Reduced order models (ROMs) are widely used to enable efficient simulation of mistuned bladed disks. ROMs based on projecting the system dynamics into a subspace spanned by the modes of the tuned structure work well for ... -
Recuperator Performance Assessment in Humidified Micro Gas Turbine Applications Using Experimental Data Extended With Preliminary Support Vector Regression Model Analysis
(The American Society of Mechanical Engineers (ASME), 2021)Cycle humidification applied to micro gas turbines (mGTs) offers a solution to overcome their limited operational flexibility in terms of variable electrical and thermal power production when used in a combined heat and ... -
A Strategy to Tune Acoustic Terminations of Single-Can Test-Rigs to Mimic Thermoacoustic Behavior of a Full Engine
(The American Society of Mechanical Engineers (ASME), 2021)Thermoacoustic properties of can-annular combustors are commonly investigated by means of single-can test-rigs. To obtain representative results, it is crucial to mimic can–can coupling present in the full engine. However, ... -
Unsteady Modeling of Turbochargers for Automotive Applications by Means of a Quasi3D Approach
(The American Society of Mechanical Engineers (ASME), 2021)This work describes the development and the application of a quasi3D method for the simulation of turbochargers for automotive applications under unsteady flow conditions. The quasi3D approach is based on the solution of ... -
Multivariable Adaptive Control Method for Turbofan Engine With Dynamic and Input Uncertainties
(The American Society of Mechanical Engineers (ASME), 2021)The dynamic characteristics of the turbofan engine vary greatly in the full flight envelope, which makes the problem of dynamic uncertainty and input uncertainty very prominent. This brings different degrees of performance ... -
Experimental and Computational Investigation of Flow Structure in Buoyancy-Dominated Rotating Cavities
(The American Society of Mechanical Engineers (ASME), 2021)The flow and heat transfers inside high-pressure (HP) compressor rotating cavities are buoyancy driven and are known to be extremely difficult to predict. The experimental data of laser-Doppler anemometry (LDA) measurements ... -
Shape Optimization of Thermoacoustic Systems Using a Two-Dimensional Adjoint Helmholtz Solver
(The American Society of Mechanical Engineers (ASME), 2021)Thermoacoustic instabilities, which arise due to the interaction between flames and acoustics, are sensitive to small changes to the system parameters. In this paper, we apply adjoint-based shape optimization to a 2D finite ... -
Generalized Model for the Approximation of Coupled Acousto-Mechanical Natural Frequencies in High-Pressure Centrifugal Compressors
(The American Society of Mechanical Engineers (ASME), 2021)The oil and gas, chemical, and process industries employ centrifugal compressors for a wide range of applications. Due to this, the conditions under which centrifugal compressors have to operate vary significantly from ... -
Experimental Investigation of the Combustion Behavior of Single-Nozzle Liquid-FLOX®-Based Burners on an Atmospheric Test Rig
(The American Society of Mechanical Engineers (ASME), 2021)As an alternative to the commonly used swirl burners in microgas turbines (MGT), the FLOX®-based combustion concept promises great potential for the nitric oxide emission reduction and increased fuel flexibility. Despite ... -
An Experimental and Modeling Strategy for Obtaining Complete Characteristic Maps of Dual-Volute Radial Inflow Turbines
(The American Society of Mechanical Engineers (ASME), 2021)Despite the importance of turbocharged engines with dual-volute turbines, their characteristic maps and fully predictive modeling using 1D gas dynamic codes are not well established yet. The complexity of unsteady flow and ... -
Analysis of Thermoacoustic Modes in Can-Annular Combustors Using Effective Bloch-Type Boundary Conditions
(The American Society of Mechanical Engineers (ASME), 2021)Heavy-duty gas turbines are commonly designed with can-annular combustors, in which all flames are physically separated. Acoustically, however, the cans communicate via the upstream located compressor plenum or at the ...