Journal of Turbomachinery: Recent submissions
Now showing items 461-480 of 4519
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A Numerical Test Rig for Turbomachinery Flows Based on Large Eddy Simulations With a High-Order Discontinuous Galerkin Scheme—Part II: Shock Capturing and Transonic Flows
(The American Society of Mechanical Engineers (ASME), 2023)In the second paper of this three-part series, we focus on the simulation of transonic test cases for turbomachinery applications using a high-order discontinuous Galerkin spectral element method (DGSEM). High-fidelity ... -
Tail-Integrated Boundary Layer Ingesting Propulsion Systems for Turbo-Electric Aircraft
(The American Society of Mechanical Engineers (ASME), 2023)This article presents conceptual design guidelines and results for a tail-integrated propulsion system for a turbo-electric civil transport aircraft with boundary layer ingestion (BLI). The aerodynamic performance goal is ... -
Computational Aeroacoustics for a Cold, Non-Ideally Expanded Aerospike Nozzle
(The American Society of Mechanical Engineers (ASME), 2023)In supersonic aerospace applications, aerospike nozzles have been subject of growing interest. This study sheds light on the noise components of a cold jet exhausting an aerospike nozzle. Implicit large eddy simulations ... -
Impact of the Purge Flow Density Ratio on the Rim Sealing Effectiveness in Hot Gas Ingestion Measurements
(The American Society of Mechanical Engineers (ASME), 2023)The rim seals of gas turbines are used to control the ingestion of hot mainstream gas into the wheel space between the rotor disk and the stationary casing. Sealing air, which is generally used to pressurize the cavity ... -
On the Use of Pressure-Sensitive Paint to Determine the Rim Sealing Effectiveness
(The American Society of Mechanical Engineers (ASME), 2023)The control of cavities sealing has been a challenging problem since early gas turbine development stages and several aspects regarding the flow physics and the modeling of rim seal flows, especially in terms of unsteady ... -
The Application of Fluidic Sealing in Shrouded Gas Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2023)This paper presents a study conducted on a new gas turbine designed to limit leakage in the labyrinth seal. The slots in the fin are used to generate a bypass flow, which obstructs the flow in the gap above the fin. The ... -
Assessment of the DDES-γ Model for the Simulation of a Highly Loaded Turbine Cascade
(The American Society of Mechanical Engineers (ASME), 2023)The flow over the linear low-pressure turbine cascade MTU-T161 at Re = 90,000 is analyzed using delayed detached eddy simulations (DDES). At this operating point, the low Reynolds number and the high loading of the blade ... -
Effects of Manufacturing Tolerances on Double-Wall Effusion Cooling
(The American Society of Mechanical Engineers (ASME), 2023)As aeroengine designers seek to raise turbine entry temperatures for greater thermal efficiencies, novel cooling schemes are required to ensure that components can survive in increasingly hotter environments. By utilizing ... -
Fundamentals of Scaling of Overall Cooling Effectiveness With Temperature Ratio
(The American Society of Mechanical Engineers (ASME), 2023)In this paper we study the relationship between overall cooling effectiveness (or so-called metal effectiveness) and mainstream-to-coolant total temperature ratio (TR), for typical high-pressure nozzle guide vane (HPNGV) ... -
Validation of Filtered Rayleigh Scattering Optical Rake Measurement Techniques in Turbomachinery Applications and Boundary Layers
(The American Society of Mechanical Engineers (ASME), 2023)Filtered Rayleigh scattering (FRS) is a non-intrusive, laser-based optical technique for measuring three-component velocity, static temperature, and static density with high spatial resolution and low uncertainty. FRS can ... -
Computational Fluid Dynamics Simulations of the Unsteady-State Flow Through a 1.5-Stage High-Work Turbine
(The American Society of Mechanical Engineers (ASME), 2023)Behr et al. (2007, “Unsteady Flow Physics and Performance of a One-and-1/2-Stage Unshrouded High Work Turbine,” ASME J. Turbomach., 129, pp. 348–359) have experimentally investigated the unsteady-state flow and clocking ... -
Conjugate Heat Transfer Evaluation of Turbine Blade Leading-Edge Swirl and Jet Impingement Cooling With Particulate Deposition
(The American Society of Mechanical Engineers (ASME), 2023)Internal cooling structures for gas turbine engines are becoming more complicated to push the hot gas temperature as high as possible, which, however, allows particulates drawn into the coolant air to be more readily to ... -
Quantifying Part-to-Part Flow Variations and Cooling Effectiveness in Engine-Run Blades
(The American Society of Mechanical Engineers (ASME), 2023)As turbine inlet temperatures continue to increase for modern gas turbine engines, the lifing of hot section components operating in a range of environments is becoming increasingly challenging. Engine operations in harsh ... -
Heat Transfer in an Injector-Scaled Additively Manufactured Fuel Passage
(The American Society of Mechanical Engineers (ASME), 2023)Knowledge of heat transfer in fuel wetted passages is important for informing injector design and life estimates due to the effects of temperature on fuel degradation. Future injectors will be manufactured using additive ... -
Fan Flutter Mechanisms Related to Blade Mode Shape and Acoustic Properties
(The American Society of Mechanical Engineers (ASME), 7/27/2023 )The blade mode shape and acoustic properties are important factors that affect the aeroelasticity of fan blades. The goal of this paper is to investigate the stall flutter mechanism associated with the first mode and its ... -
Internal Heat Transfer Measurement on Metal-Based Additively Manufactured Channels Using a Transient Technique
(The American Society of Mechanical Engineers (ASME), 7/27/2023 )The advancements in additive manufacturing (AM) of metals open new possibilities in the design of gas turbine parts. Especially the cooling efficiency of internal channels can be improved with more complex geometries. ... -
An Aerodynamic Loss Model for Axial Turbine Design
(The American Society of Mechanical Engineers (ASME), 7/27/2023 )Aerodynamic loss models play an important role in the preliminary design of axial turbines. However, prediction accuracy and parameter sensitivity of traditional models being used for decades are problematic. Thus, this ... -
Novel Strategy for Thermal Evaluation of Film-Cooled Blades Using Thermographic Phosphors at Simulated Engine Conditions
(The American Society of Mechanical Engineers (ASME), 6/12/2023 )Practical strategy for the thermal evaluation of film-cooled blade is of great importance to the gas turbine community. Due to the physical or methodology limitations, it is difficult to evaluate the blade’s thermal ... -
Assimilation of Disparate Data for Improving the Performance Prediction of Body-Force Model
(The American Society of Mechanical Engineers (ASME), 6/12/2023 )Despite the extensive application of three-dimensional Reynolds-averaged Navier-Stokes equation (RANS) in axial compressor numerical simulations, body-force model (BFM) also plays its own role profiting from its low ... -
Experimental and Computational Investigation of Shaped Film Cooling Holes Designed to Minimize Inlet Separation
(The American Society of Mechanical Engineers (ASME), 6/9/2023 1)Film cooling is used to protect turbine components from the extreme temperatures by ejecting coolant through arrays of holes to create an air buffer from the hot combustion gases. Limitations in traditional machining meant ...