Journal of Turbomachinery: Recent submissions
Now showing items 181-200 of 4312
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Large Eddy Simulation of Laminar and Turbulent Shock/Boundary Layer Interactions in a Transonic Passage
(The American Society of Mechanical Engineers (ASME), 2024)Shock/boundary layer interactions (SBLI) are a fundamental fluid mechanics problem relevant in a wide range of applications including transonic rotors in turbomachinery. This paper uses wall-resolved large eddy simulation ... -
Investigation on the Flow and Heat Transfer Characteristics in a Multi-Pass Channel Using Magnetic Resonance Velocimetry and Transient Thermochromic Liquid Crystal
(The American Society of Mechanical Engineers (ASME), 2024)The three-dimensional flow field in multi-pass channels with and without ribs was measured by magnetic resonance velocimetry (MRV), while heat transfer performance on the endwall of channels in the same geometry was ... -
Enhancing Aerodynamic Performance of a Non-Axisymmetric Endwall Contoured Cascade Through Section Profiling Method
(The American Society of Mechanical Engineers (ASME), 2024)Endwall contouring and 3D blade configurations are effective techniques for enhancing turbomachinery performance. The integration of these technologies is an important area of investigation. To continue the numerical and ... -
Pragmatic Prediction Model of Droplet Trajectory in a Turbine Cascade
(The American Society of Mechanical Engineers (ASME), 2024)Droplet deposition on a turbine cascade is important for the turbine system performance but its experimental analysis is difficult. Thus, the simulation of a droplet liquid phase in a gas flow field was studied to optimize ... -
Considerations for Compressible Film Cooling: A Computational Study of the Effects of Transonic Flows and Varying Mainstream Mach Number
(The American Society of Mechanical Engineers (ASME), 2024)Recent evidence suggests that film cooling flows with engine-realistic mainstream Mach number have declined performance in comparison to those with conventional low-speed laboratory conditions. Consideration and understanding ... -
Design Optimization of a Novel Flush Boundary Layer Diverter
(The American Society of Mechanical Engineers (ASME), 2024)A novel boundary layer diverter is designed and optimized for increasing the performance of a typical semi-submerged inlet ingesting large amounts of boundary layer flow. A conceptual diverter configuration based on the ... -
Aerothermal Performance Robustness and Reliability Analysis of Turbine Blade Squealer Tip With Film Cooling
(The American Society of Mechanical Engineers (ASME), 2024)The uncertainty quantification in the turbine components' aerodynamic and heat transfer performances is widely considered to be the most challenging topic due to its intricate and nonlinear characteristics. This paper first ... -
Evaluation of Adjoint-Optimized Holes—Part I Baseline Performance
(The American Society of Mechanical Engineers (ASME), 2024)With the advent of the use of additive manufacturing to build gas turbine components, the design space for new hole geometries is essentially unlimited. Recently, a computational adjoint-based optimization method was used ... -
Film Cooling Performances Under Various Upstream Roughness Conditions: Experimental Investigations and Similarity Hypothesis
(The American Society of Mechanical Engineers (ASME), 2024)Roughness caused by deposition, erosion, and additive manufacturing can significantly affect gas turbine efficiency. Previous research has often examined film cooling performance under limited roughness configurations, ... -
Stall Warning and Adaptive Control Subjected to Rotating Inlet Distortion in Axial Flow Compressor
(The American Society of Mechanical Engineers (ASME), 2024)Adaptive stability control is experimentally implemented in a single-stage axial flow compressor subjected to rotating inlet distortion. Stall margin variations are examined as a function of the distorted area and rotational ... -
Investigation of an Inter-Compressor S-Duct Using the Lattice Boltzmann Method
(The American Society of Mechanical Engineers (ASME), 2024)This article presents the study of a subsonic inter-compressor S-duct. Numerical simulations are performed using large-eddy simulation (LES) based on a compressible hybrid thermal lattice Boltzmann method (LBM) implemented ... -
A New Perspective on Internal Turbine Blade Cooling by Perforated Blockages and Pin-Fins
(The American Society of Mechanical Engineers (ASME), 2024)The cooling configuration, sequentially combining perforated blockages (forming blockage jets) and a pin-fin array inside the trailing-edge of a turbine blade has been perceived unsuitable due to the presumed inferior ... -
Impact of Low Freestream Turbulence and Surface Roughness on the Flat-Plate Boundary Layer Transition Under a High-Lift Airfoil Pressure Gradient
(The American Society of Mechanical Engineers (ASME), 2024)Effects of low incoming freestream turbulence level (Tu < 1%) and surface roughness on the transition of flat-plate boundary layers under a high-lift airfoil pressure gradient have been investigated. Time-resolved ... -
Design, Multi-Point Optimization, and Analysis of Diffusive Stator Vanes to Enable Turbine Integration Into Rotating Detonation Engines
(The American Society of Mechanical Engineers (ASME), 2024)Pressure gain combustion is considered a possible path toward improved thermal cycle efficiency and reduced carbon emissions. However, ad hoc turbine designs are required to maximize the thermodynamic potential; the new ... -
Investigation of the Map Width Improvement in a Radially Reduced Diffuser Design Concept for a Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2024)Often, an improvement in performance at one operating point in a compressor/turbine operating map will lead to a reduction in performance at another area. For example, improving the efficiency of a compressor at design ... -
Corner Separation Control Using Sweeping Jet Actuator in a Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2024)In the pursuit of advancing active flow control (AFC) technology, a more promising nonsteady actuator known as sweeping jet actuator (SJA) has been equipped on the endwall to manage the corner separation in a compressor ... -
Particle Bounce Stick Behavior in the Rotating Frame of Reference
(The American Society of Mechanical Engineers (ASME), 2024)Particle deposition is a major damage mechanism for gas turbine components, especially in the secondary air system. Predicting the transport and deposition of ingested atmospheric contaminants is of great interest in ... -
On the Origin of “Rotating Instabilities”—Stability and Frequency Studies of Channel Flows
(The American Society of Mechanical Engineers (ASME), 2024)A group of unsteady flow phenomena in turbomachinery is often referred to as “rotating instabilities.” They occur at flow conditions with very asymmetric velocity profiles, as found downstream of blade rows in axial ... -
An Open–Closed Flow Separation in a Compressor Radial Diffuser
(The American Society of Mechanical Engineers (ASME), 2024)Large eddy simulations (LES) results are used to track flow separation zones in a splittered vaned radial diffuser near the compressor best efficiency at high rotation speed. The topology analysis reveals some closed ... -
Action Mechanism of Film Extraction on Channel Impingement Cooling for Blade Leading Edge Using Large Eddy Simulation
(The American Society of Mechanical Engineers (ASME), 2024)Various internal cooling techniques combined with external film cooling are applied to cool gas turbine blades, and the coolant extraction can cause variations in internal flow structures and cooling effectiveness. Effects ...