Journal of Turbomachinery: Recent submissions
Now showing items 601-620 of 4519
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The Influence of Combustor Hot Streaks on the Aerodynamic Performance of a Turbine Center Frame
(The American Society of Mechanical Engineers (ASME), 2022)This paper investigates the influence of combustor temperature non-uniformities on modern engine turbine center frames (TCFs). Due to their position in an engine, coupled with the trends of more aggressive designs, increased ... -
The Modeling of Roughness Effect on the Performance of a Controlled Diffusion Airfoil
(The American Society of Mechanical Engineers (ASME), 2022)The manufacturing and operational roughness of aerodynamic profiles impacts both the laminar and the turbulent boundary layers state, directly affecting the aerodynamic and thermal performance of typical turbomachinery ... -
Computational and Experimental Study of Film-Cooling Effectiveness With and Without Downstream Vortex Generators
(The American Society of Mechanical Engineers (ASME), 2022)Downstream vortex generators that involve a pair of rectangular plates arranged in an open V-shape placed just downstream of each film-cooling hole were shown to create flow and vortical structures that entrain lifted ... -
Particle Image Velocimetry in a High-Speed Short-Duration Turbine Rig
(The American Society of Mechanical Engineers (ASME), 2022)This article presents the implementation of a particle image velocimetry (PIV) into the high-speed short-duration rotating turbine facility of the von Karman Institute. The advantage of PIV as a whole-field measurement is ... -
Film Cooling and Cold Streaks Tracking on a Fully Cooled Nozzle Guide Vane Under Representative Combustor Outflow Conditions
(The American Society of Mechanical Engineers (ASME), 2022)The pronounced nonuniform temperature distribution in the core engine flow path is a recurring problem of gas turbine engine design process. Specifically, turbine entry conditions are usually characterized by severe ... -
A Resistive Model to Characterize Overall Effectiveness Influenced by Multiple Coolant Temperatures
(The American Society of Mechanical Engineers (ASME), 2022)The surface temperature of a film cooled turbine hot gas path component is typically nondimensionalized according to the overall effectiveness. This nondimensionalization scheme takes advantage of the fact that the surface ... -
Frequency Lock-In Phenomenon of Vortex Induced Vibration of a Rotating Blade Considering Bending-Torsion Coupling Effect
(The American Society of Mechanical Engineers (ASME), 2022)A rotating thin blade with bend-torsional coupling subjected to vortex induced vibration (VIV) is considered in this paper. It is necessary to study the motion coupled bending torsion due to the discordant centroid and ... -
Mechanism of Axial Compressor Tip Clearance Noise Based on Taylor–Couette Flow Rotating Instability
(The American Society of Mechanical Engineers (ASME), 2022)Prediction of the tip clearance noise (TCN) of axial compressors is essential to accurately determine the noise level of the compressor, because it is left unattenuated during propagation. The existing studies on numerical ... -
Profile Loss Reduction of High-Lift Turbine Blades With Rough and Ribbed Surfaces
(The American Society of Mechanical Engineers (ASME), 2022)Transitional boundary layers on low-pressure turbines (LPTs) are prone to separation on the suction surface of the blade under strong local adverse pressure gradients. Intermittent freestream turbulence, periodic wakes ... -
Robustness Analysis on Aerothermal Performance of the Winglet Squealer Tip—Part II: Heat Transfer Performance
(The American Society of Mechanical Engineers (ASME), 2022)This article is the second part of a robustness analysis of the aerothermal performance of the winglet structure. A challenging analytical test function and an engineering test are considered to further investigate the ... -
Robustness Analysis on Aerothermal Performance of the Winglet Squealer Tip—Part 1: Aerodynamic Performance
(The American Society of Mechanical Engineers (ASME), 2022)Accurately assessing the robustness of the aerothermal performance of the blade tip is important considering that uncertainty is inevitable in the actual operation of turbines. However, the conventional uncertainty ... -
Vortex Unsteadiness in the Endwall Region of a High-Lift Low-Pressure Turbine Passage
(The American Society of Mechanical Engineers (ASME), 2022)Three-dimensional vortical structures within the endwall region of turbine passages directly affect the aerodynamic efficiency and heat transfer characteristics of the turbine. Interactions between the vortical endwall ... -
Assessment of Low Engine Order Excitation of a Contaminated Turbocharger Radial Turbine Stage Using a Nozzle Ring Only Computational Model
(The American Society of Mechanical Engineers (ASME), 2022)The use of critical fuels such as heavy fuel oil (HFO) usually leads to deposits of combustion residues in the turbocharger turbine stage, foremost in the nozzle ring where flow channels can get partially or completely ... -
An Improved Particle Impact Model by Accounting for Rate of Strain and Stochastic Rebound
(The American Society of Mechanical Engineers (ASME), 2022)A methodology for informing physics-based impact and deposition models through the use of novel experimental and analysis techniques is presented. Coefficient of restitution (CoR) data were obtained for Arizona Road Dust ... -
A Fluid–Structure Interaction Tool Using a Van der Pol-Based Reduced-Order Model for Buffet and Nonsynchronous Vibrations
(The American Society of Mechanical Engineers (ASME), 2022)This paper builds upon a two-degree-of-freedom Van der Pol oscillator-based reduced-order model for studying the mechanisms around nonsynchronous vibrations (NSV) in turbomachinery. One degree tracks the fluid motion ... -
Stratified and Buoyancy-Induced Flow in Closed Compressor Rotors
(The American Society of Mechanical Engineers (ASME), 2022)The radial growth of compressor discs is strongly influenced by conjugate heat transfer between conduction in the co-rotating discs and buoyancy-driven convection in the rotating fluid core between the discs. An accurate ... -
Theoretical Considerations for Scaling Convection in Overall Effectiveness Experiments
(The American Society of Mechanical Engineers (ASME), 2022)An increasingly common experimental technique allows measurement of overall effectiveness by matching the Biot number between experimental and engine conditions. While much work has been devoted to determining the appropriate ... -
Use of Multiple Tracer Gases to Quantify Vane Trailing Edge Flow Into Turbine Rim Seals
(The American Society of Mechanical Engineers (ASME), 2022)Overlapping features are commonly used as rim seals between stationary and rotating components in a turbine stage. These rim seals are used to prevent main gas path ingestion to the wheelspace cavity, which reduces the ... -
Plume Model for Buoyancy-Induced Flow and Heat Transfer in Closed Rotating Cavities
(The American Society of Mechanical Engineers (ASME), 2022)The radial clearance between the rotating blades and stationary casing of a gas-turbine compressor depends on the radial growth of the rotating discs to which the blades are attached, and this growth depends on the ... -
Magnetic Resonance Velocimetry of a Turbine Blade With Engine-Representative Internal and Film Cooling Structures
(The American Society of Mechanical Engineers (ASME), 2022)As a key technology to ensure turbine survival, blade cooling encompasses a whole range of strategies with ever-increasing geometric complexities. Flow measurement for turbine blades with such intricate internal and external ...