Journal of Turbomachinery: Recent submissions
Now showing items 401-420 of 4519
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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 ... -
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 ... -
Transonic Compressor Darmstadt Open Test Case: Experimental Investigation of Stator Secondary Flows and Hub Leakage
(The American Society of Mechanical Engineers (ASME), 2024)The future trend of clean sky aviation has led to a smaller core engine, resulting in highly loaded stages with increased relative tip gaps and leakage flows, which causes a reinforced influence of secondary flow phenomena. ... -
Attenuation of Inlet Distortion Effects on Fans Using Asymmetric Inlet Guide Vanes
(The American Society of Mechanical Engineers (ASME), 2024)This research proposes and preliminarily analyzes a novel concept to passively reduce the negative impact of deep inlet distortion on the fan of an aero-engine. It consists of placing a row of non-axisymmetric inlet guide ... -
On the Secondary Flow System of an Aggressive Inter Compressor Duct
(The American Society of Mechanical Engineers (ASME), 2024)In contrast to the highly optimized rotating components, the inter compressor duct (ICD) is offering a high potential for further improvements. Due to a more aggressive design, the length of the whole engine can be reduced. ... -
Experimental Analysis of the Time-Wise Compressor Fouling Phenomenon
(The American Society of Mechanical Engineers (ASME), 2024)Compressor fouling is still an unforeseen phenomenon. Gas turbines for heavy-duty and propulsion applications are subject to performance degradation due to fouling, erosion, and corrosion mechanisms. Unlike the last two, ... -
An Improved Body Force Model to Simulate Blade Loading Variation Under Various Operating Conditions in Transonic Axial Flow Compressor
(The American Society of Mechanical Engineers (ASME), 2024)In order to analyze the unsteady aerodynamic response of compressors with limited computational resources, the development of the body force (BF) model has been pursued for decades. This model can simulate the effects of ... -
Endwall Contouring for Improving Aerodynamic Performance in a High-Pressure Turbine Cascade
(The American Society of Mechanical Engineers (ASME), 2024)The endwall contouring has proven to be an effective technique in controlling the impacts of secondary flow within turbomachinery. A baseline cascade with the original axisymmetric endwall (BASE) has been redesigned with ... -
Turbine Cavity Mainstream Ingestion Assessing Method Based on Penetration Depth Analysis
(The American Society of Mechanical Engineers (ASME), 2024)The turbine cavity faces challenges from external mainstream ingestion, mitigated by sealing flow from the compressor side. Despite these efforts, achieving complete sealing remains difficult. This study focuses on introducing ... -
A Free Streamline Model for Fully Separated Turbomachine Flows
(The American Society of Mechanical Engineers (ASME), 2024)This paper describes the use of the free streamline approach to determine flows in fully separated cascades, and to thereby provide a rational basis for estimating the performance of axial turbomachinery at severely ... -
Effect of the Key Geometry and Flow Parameters on Discharge Coefficient of Laidback Fan-Shaped Hole Under Coolant Crossflow Condition
(The American Society of Mechanical Engineers (ASME), 2024)A laidback fan-shaped hole is commonly used due to its superior lateral film coverage. Its discharge coefficient is significantly influenced by internal crossflow owing to its complex geometrical structure. In this paper, ... -
Impact of High-Pressure-Turbine Purge Flow on the Evolution of Turbulence in a Turbine Vane Frame
(The American Society of Mechanical Engineers (ASME), 2024)This paper describes the measurement and postprocessing of turbulence data. The experiments were carried out in a two-stage, two-spool transonic turbine test rig at the Institute for Thermal Turbomachinery and Machine ... -
Experiments on Tuned UHBR Open-Test-Case Fan ECL5/CATANA: Performance and Aerodynamics
(The American Society of Mechanical Engineers (ASME), 2024)With the advancement of modern fan architectures, the lack of experimental benchmarks for the research community became apparent in the recent years. Enormous effort in the method development could not be validated on ...