Journal of Engineering for Gas Turbines and Power: Recent submissions
Now showing items 61-80 of 9298
-
On Hysteresis in a Variable Pitch Fan Transitioning to Reverse Thrust Mode and Back
(The American Society of Mechanical Engineers (ASME), 2024)A novel hysteresis phenomenon during the transition to and back from the reverse thrust mode in a variable pitch fan (VPF) is identified and characterized in this work. This is done using a three-dimensional fully transient ... -
Investigation of Onboard Power Generation Method Using Waste Energy at Altitude Conditions
(The American Society of Mechanical Engineers (ASME), 2024)Demand for increased onboard power generation on small aircraft is ever growing due to increased electrical power demand. The objective of this study is to investigate onboard power generation using waste energy at various ... -
Validation of a Methodology to Assess the Flutter Limit Cycle Oscillation Amplitude of Low-Pressure Turbine Bladed Disks—Part II: Rotational Speed Effects
(The American Society of Mechanical Engineers (ASME), 2024)The effect of the operating conditions on the vibration amplitude trends of an isolated low-pressure turbine rotor is described. The study utilizes an analytical model correlating the aerodynamic and dry-friction work ... -
Supercritical Carbon Dioxide Mixing Loss Characteristics Near the Critical Point
(The American Society of Mechanical Engineers (ASME), 2024)This paper aims to study the mixing loss characteristic of supercritical carbon dioxide (sCO2) near the critical point and shed light on the nonideal fluid effect on the mixing losses. As a simplified model of the mixing ... -
A Computational Fluid Dynamics Study on the Performance of Modified H-Shaped VAWTs for Tilted Operation Condition
(The American Society of Mechanical Engineers (ASME), 2024)Wind energy harvesting may see radical transformation with the introduction of new wind turbine concepts. The vertical axis configuration offers significant advantages that may promote the installation in deep waters, where ... -
A Computational Study of Temperature-Driven Low Engine Order Forced Response in High Pressure Turbines
(The American Society of Mechanical Engineers (ASME), 2024)This paper reports the results of computational studies of the effect of combustor exit temperature distortions on low engine order (LEO) forced response of a high pressure turbine (HPT). Forced response of this kind occurs ... -
Thermal Load Control in High-Temperature Heat Pumps: A Comparative Study
(The American Society of Mechanical Engineers (ASME), 2024)High-temperature heat pumps (HTHPs) are becoming increasingly relevant in the industry as they represent a promising solution for decarbonizing industrial heat. These technologies can enable the electrification of industrial ... -
Variable Cycle Engine Concepts and Component Technologies—An Overview
(The American Society of Mechanical Engineers (ASME), 2024)The variable cycle engine (VCE) is of interest for military and supersonic civil platforms due to its improved operational flexibility. However, the increase in design and control degrees-of-freedom results in a more complex ... -
On the Relationship Between Swirl and Unsteadiness Within Turbine Rim Seals
(The American Society of Mechanical Engineers (ASME), 2024)Unraveling the flow physics pertaining to hot gas ingress in turbines is crucial in enabling designers to realize global decarbonization targets in aerospace. A turbine rim seal is fitted at the periphery of the rotor–stator ... -
Experimental Characterization of a Bladeless Air Compressor
(The American Society of Mechanical Engineers (ASME), 2024)The Tesla compressor is an innovative technology that offers a unique approach to fluid compression. Unlike traditional compressors that use rotating blades, bladeless compressors utilize closely spaced disks to create ... -
Semi-Closed Oxy-Combustion Combined Cycles for Combined Heat and Power Applications
(The American Society of Mechanical Engineers (ASME), 2024)This study focuses on the design and comparison of three utility-scale combined heat and power (CHP) cycles with carbon capture and storage (CCS): (i) a CHP semi-closed oxy-combustion combined cycle (SCOC-CC), (ii) a CHP ... -
A Validated Unsteady Turbofan Engine Performance Simulation Using Pseudo Bond Graph Approach
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, the unsteady performance of a turbofan engine is illustrated and modeled using the pseudo-bond graph approach. The pseudo-bond graph method allows multiphysical and interdisciplinary systems to be described ... -
Isothermal Flow Field Characterization of a Full-Scale Sector Combustor at Elevated Pressures
(The American Society of Mechanical Engineers (ASME), 2024)An experimental investigation in a sector (20 deg) of full-scale annular gas turbine combustor is performed. The sector combustor is optically accessible for the flow and flame visualization of the primary and exit zones ... -
A Wide-Bandwidth and High-Resolution Identification Method for the Dynamic Characteristics of Annular Gas Seals Using Hilbert Transform
(The American Society of Mechanical Engineers (ASME), 2024)Efficient and accurate parameter identification methods are urgently needed to develop high-performance sealing devices. Although the existing prediction methods have been widely validated, researchers are still grappling ... -
A Novel Thermally Integrated CO2-Carnot Battery (TI-PTES) Utilizing Cold Thermal Storage
(The American Society of Mechanical Engineers (ASME), 2024)The growing integration of renewable energy sources in the energy grid presents intermittency and negative pricing challenges, necessitating large-scale energy storage solutions. Pumped thermal energy storage (PTES) can ... -
Reverse Thrust Aerodynamics of Variable Pitch Fans With Inlet Distortion
(The American Society of Mechanical Engineers (ASME), 2024)Variable pitch fans (VPFs) can improve the operability of low pressure ratio fan systems by repitching the rotor blades. If a variable pitch fan can generate sufficient reverse thrust on landing, it will also eliminate the ... -
Numerical Analysis and Design of New Exhaust Section Downstream of Constant Volume Combustor
(The American Society of Mechanical Engineers (ASME), 2024)Pressure gain combustors (PGC) exploit either their isochoric or detonative combustion increasing the theoretical thermal efficiency of a gas turbine cycle. On this basis, a constant-volume combustor (CVC) is developed ... -
Evaluation of Data-Driven Classifiers for an Ignition Forecast of Large Gas Turbines
(The American Society of Mechanical Engineers (ASME), 2024)Prediction of successful ignition is a challenging task that requires knowledge of the local thermochemical state in highly turbulent flow conditions. For typical industrial gas turbine (GTs) conditions operated on active ... -
Assessment of Rotordynamic Characteristics for Two Types of Damper Seals Operating in a Steam Turbine
(The American Society of Mechanical Engineers (ASME), 2024)Damper seals (such as pocket damper seal (PDS), hole-pattern/honeycomb damper seals) and swirl brakes have been commonly used for many years as a solution for the rotor vibration instability in multiple-stage centrifugal ... -
Mass and Heat Exchange in Rotating Compressor Cavities With Variable Cob Separation
(The American Society of Mechanical Engineers (ASME), 2024)Next generation aeroengines will operate at ever-increasing pressure ratios with smaller cores, where the control of blade-tip clearances across the flight cycle is an emerging design challenge. Such clearances are affected ...