YaBeSH Digital Library: Recent submissions
Now showing items 14181-14200 of 316660
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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 ... -
A New Method for Solving Physical Problems With Nonlinear Phoneme Within Fractional Derivatives With Singular Kernel
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, we present a novel numerical approach for solving nonlinear problems with a singular kernel. We prove the existence and uniqueness of the solution for these models as well as the uniform convergence of the ... -
Vision-Inertial Fusion for Enhanced Relative Navigation: Application of MEKF and Refined Template Matching for Target Identification
(The American Society of Mechanical Engineers (ASME), 2024)This paper presents a formulation and methodologies for a vision-aided inertial navigation system designed for autonomous landing or proximity operation. Measurements from a monocular camera are integrated with inertial ... -
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 ... -
Solutions of Time-Space Fractional Partial Differential Equations Using Picard's Iterative Method
(The American Society of Mechanical Engineers (ASME), 2024)In this paper, we present Picard's iterative method (PIM) for solving time–space fractional partial differential equations, where the derivatives are considered in the Caputo sense. We prove the existence and uniqueness ... -
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 ... -
Strategies for High-Accuracy Measurements of Stage Efficiency for a Cooled Turbine
(The American Society of Mechanical Engineers (ASME), 2024)Gas turbines are used in a broad range of aerospace and land-based applications from power generation to aviation, and their usage is projected to continue to grow. It is therefore critical to improve turbine efficiency ... -
The Role of Turbulence Transport in Mechanical Energy Budgets
(The American Society of Mechanical Engineers (ASME), 2024)In this article, we study the role of turbulence transport on loss prediction using high fidelity scale-resolving simulations. For this purpose, we use eight high-fidelity simulation datasets and compute flux of entropy ...