Journal of Turbomachinery: Recent submissions
Now showing items 341-360 of 4519
-
An Investigation of Secondary Cooling Effect on the Endwall Surface With Vane Trailing Edge Coolant Injection
(The American Society of Mechanical Engineers (ASME), 2024)Considering the adequate use of coolant, the secondary cooling effect of trailing edge coolant injection on the downstream endwall surface is investigated in this study. Distributions of adiabatic cooling effectiveness on ... -
Boundary Layer Analysis of a Transonic High-Pressure Turbine Vane Using Ultra-Fast-Response Temperature-Sensitive Paint
(The American Society of Mechanical Engineers (ASME), 2024)The focus of this article is the impact of surface roughness on the boundary layer caused by a 7YSZ thermal barrier coating (TBC). Experimental investigations are conducted on a NGV installed inside the wind tunnel for ... -
Numerical Investigation of Flow Evolution in Centrifugal Compressors During Surge
(The American Society of Mechanical Engineers (ASME), 2024)Surge can lead to violent flow fluctuations in the compression system and damage to the blade structures. In this article, a fully three-dimensional numerical model of the centrifugal compressor surge is developed, and the ... -
Axial Compressor Transonic Rotor Shock Interaction With Upstream Stator Row
(The American Society of Mechanical Engineers (ASME), 2024)Modern multistage axial compressors are designed for high aerodynamic loading and wide range with front stages rotor inlet relative Mach number above one over a large portion of span. Rotor shock waves propagate and reflect ... -
Experimental Investigation of Mode-Frequency Scattering at Fan Stages
(The American Society of Mechanical Engineers (ASME), 2024)For the development of low-noise fan designs the sound generation must be reduced at the source, but also sound transmission effects through the rotor can be exploited to reduce the noise emitted to the far-field. Rotor ... -
Numerical Investigation of the Effect of Trailing Edge Thickness of Simulated Ceramic Matrix Composite Blades on Loss Profiles
(The American Society of Mechanical Engineers (ASME), 2024)Ceramic matrix composite (CMC) is an enabling material allowing higher turbine inlet temperatures and possibly resulting in better thermal efficiency of gas turbine engines. This is because CMC layers with environmental ... -
Purge–Mainstream Interactions in a Turbine Stage With Rotor Endwall Contouring
(The American Society of Mechanical Engineers (ASME), 2024)Purge flows are prevalent in modern gas turbine design, allowing for increased turbine entry temperatures. The purge flow passes through a rim seal and interacts with the mainstream flow, modifying the blade secondary flow ... -
Analysis of Ingress Into the Downstream Wheel Space of a 1.5-Stage Turbine By Full Circumference and Single Blade Passage Large-Eddy Simulations
(The American Society of Mechanical Engineers (ASME), 2024)The flow in a 1.5-stage axial turbine is investigated by large-eddy simulations. The focus is on the ingress in the downstream wheel space. Two setups are considered. In the first, the full 360 deg annulus is included on ... -
A Data-Driven Approach for Generalizing the Laminar Kinetic Energy Model for Separation and Bypass Transition in Low- and High-Pressure Turbines
(The American Society of Mechanical Engineers (ASME), 2024)No common laminar kinetic energy (LKE) transition model has to date been able to predict both separation-induced and bypass transition, both phenomena commonly found in low-pressure turbines and high-pressure turbines. ... -
Impact of Flow Unsteadiness on Turbine Airfoil Heat Transfer via Streaming
(The American Society of Mechanical Engineers (ASME), 2024)Thermal management of turbine airfoils is a critical design consideration, but the impact of unsteadiness on heat transfer of attached flow regions has received less attention in the literature. When turbine surfaces are ... -
Adaptive Batch Sampling Strategy for the Hundreds-Dimensional Aerodynamic Optimization of the Centrifugal Impeller
(The American Society of Mechanical Engineers (ASME), 2024)In recent years, in order to achieve higher performance, the number of design variables used in the aerodynamic optimization of turbomachinery (based on surrogate models) has increased significantly. However, the increase ... -
Overall Cooling Effectiveness With Internal Serpentine Channels and Optimized Film Cooling Holes
(The American Society of Mechanical Engineers (ASME), 2024)The overall cooling effectiveness for gas turbine airfoils is a function of the combined cooling due to internal cooling configurations and film cooling configurations. Typically, film cooling configurations are evaluated ... -
Numerical Characterization of Prestall Disturbances in a Compressor Stage
(The American Society of Mechanical Engineers (ASME), 2024)Compared to the subject of rotating stall, less attention has been given to prestall flow disturbances in turbomachinery. This is mostly due to the fact that these phenomena, often referred to as Rotating Instabilities, ... -
Comparison of Eddy Viscosity Models for High Turbulence Nozzle Guide Vane Flows
(The American Society of Mechanical Engineers (ASME), 2024)In this paper we investigate the performance of eddy viscosity turbulence models for high-pressure nozzle guide vane (NGV) flows with engine-realistic turbulence. Using metrics such as integrated kinetic energy (KE) loss ... -
Impacts of Superalloys on the Surface Quality of Additively Manufactured Channels
(The American Society of Mechanical Engineers (ASME), 2024)Gas turbines feature many components that require superalloys capable of handling extreme thermal environments. Increasing the selection of materials available for these components is important to their use in these extremely ... -
Experimental Research Into Aeroelastic Phenomena in Turbine Rotor Blades Inside ARIAS EU Project
(The American Society of Mechanical Engineers (ASME), 2024)This paper describes an aeroelastic experimental campaign on a low-pressure turbine-bladed rotor in a rotating wind tunnel that took place as a part of the Advanced Research Into Aeromechanical Solutions (ARIAS) EU project. ... -
Unsteady Aerodynamic Forcing Due to Distortion in a Boundary Layer Ingesting Fan
(The American Society of Mechanical Engineers (ASME), 2024)Boundary Layer Ingestion (BLI) is a concept with the potential to reduce energy consumption needed for aircraft propulsion. For the fan this results in a need to work well in an environment of increased continuous distortion. ... -
Block Spectral Method Analysis for Turbomachinery Applications
(The American Society of Mechanical Engineers (ASME), 2024)The block-wise spectral reconstruction of turbomachinery flows has been successfully used in the past to reduce the computational cost of full-annulus turbomachinery simulations. The rationale of the method is based on an ... -
A New Axial Compressor Test Facility for the Investigation of Aerodynamic Damping Featuring an Electromagnetic Excitation System
(The American Society of Mechanical Engineers (ASME), 2024)Aerodynamic damping simulations involving detailed computational fluid dynamics (CFD) models are nowadays an integral part of turbomachinery design processes, thanks to advancements made in simulation tools and in computer ... -
Identification of the Aeromechanical Parameters of a Compressor Rotor from Blade Tip Timing Data
(The American Society of Mechanical Engineers (ASME), 2024)This article presents a maximum likelihood approach to identifying the mistuning, aerodynamic forcing functions, and aerodynamic influence coefficients of compressor rotor blades from noisy experimental measurements of ...