Journal of Turbomachinery: Recent submissions
Now showing items 481-500 of 4519
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Impact of Temperature Ratio on Overall Cooling Performance: Low-Order-Model-Based Analysis of Experiment Design
(The American Society of Mechanical Engineers (ASME), 6/9/2023 1)This paper describes low-order-model-based analysis of the design of an experiment to be used for parametric studies of adiabatic film and overall cooling effectiveness for fully cooled systems (internal and film) under ... -
Harmonic Method for Simulating Unsteady Multispool Interactions
(The American Society of Mechanical Engineers (ASME), 5/30/2023 )Modern civil jet engines arrange components on spools with different rotational speeds in order to improve compressor stall margin, overall engine performance, etc. The unsteady interactions among these components can be ... -
Investigation on Flow Characteristics and Its Effect on Heat Transfer Enhancement in a Wide Channel With Staggered Diamond-S Pin Fins
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )Flow statistic in the mid-plane of a rectangular channel with diamond-s pin fins was obtained by means of particle imaging velocimetry at Re = 10,000. Large-scale and small-scale fluctuations were separated using proper ... -
Film Cooling Comparison of Full-Scale Turbine Vanes Using the Pressure Sensitive Paint Technique
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )This work is an experimental study of film cooling effectiveness on two real-scale turbine vanes in a three-vane annular cascade. The cascade is connected to a high-flow steady compressor to provide the mainstream flow. ... -
Validation of Broadband Noise Prediction Methodology Based on Linearized Navier–Stokes Analyses
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )This article presents an integral validation of a synthetic turbulence broadband noise prediction methodology for fan/outlet-guide-vane (OGV) interaction. The test vehicle is the ACAT1 fan, a modern scaled-down fan, ... -
Full Stage Axial Compressor Performance Modeling Incorporating the Effects of Blade Damage Due to Particle Ingestion
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )The damage due to particulate matter ingestion by propulsion gas turbine engines can be significant, impacting the operability and performance of plant components. Here, we focus on the axial compressor whose blades become ... -
Interaction Mechanism of Transonic Squealer Tip Cooling With the Effect of High-Speed Relative Casing Motion
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )The relative casing motion can significantly influence the turbine blade tip aerothermal performance. In this study, experimental investigation was conducted in a newly developed high-speed disk rotor rig which can mimic ... -
The Role of Endwall Shape Optimization in the Design of Supersonic Turbines for Rotating Detonation Engines
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )Rotating detonation engines (RDEs) are characterized by a thermodynamic cycle with an efficiency gain up to 15% at medium pressure ratios with respect to systems based on the conventional Joule–Bryton cycle. Multiple turbine ... -
Experimental Investigations of Centrifugal Compressor Surge Noise
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )Surge is a crucial problem for achieving a good working range of centrifugal compressor and power cycle safety. Effective and early detection of the surge is essential to avoid its onset. In this paper, experiments measuring ... -
Roughness-Resolved Large-Eddy Simulation of Additive Manufacturing-Like Channel Flows
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )In the last decade, progresses in additive manufacturing (AM) have paved the way for optimized heat exchangers whose disruptive design will heavily rely on predictive numerical simulations. However, due to typical roughness ... -
Assessment of the Impeller/Volute Relationship of Centrifugal Fans From an Aerodynamic and Aeroacoustic Perspective
(The American Society of Mechanical Engineers (ASME), 5/22/2023 )Heavy-duty centrifugal fans require high reliability and first-class performance. Besides, extreme conditions and harsh environments are often encountered, such as in the papermaking process, in steel or cement plants or ... -
Turbine Endwall Contouring Through Advanced Optimization Techniques
(The American Society of Mechanical Engineers (ASME), 4/12/2023 )Non-axisymmetric endwall profiling offers features to simultaneously mitigate aerodynamic losses and hot gas ingestion in axial turbines. This paper presents an optimization methodology to generate a contoured surface ... -
Investigation of the Interaction Between Tip Leakage and Main Annulus Flow in the Large Scale Turbine Rig: Comparison of Different Rotor Tip Geometries
(The American Society of Mechanical Engineers (ASME), 4/3/2023 1)Shroudless rotor blades are state-of-the-art in modern high pressure turbines. Tip leakage flow has a crucial impact on turbine efficiency. Specific blade tip designs are a key factor to handle tip leakage losses by ... -
Aerodynamic Performance and Leakage Flow in Turbine Cascades With Sweeping Jet Actuators
(The American Society of Mechanical Engineers (ASME), 1/30/2023 )In recent years, unsteady flow-control technology has been considered as more promising for reducing secondary flow loss in turbines. Sweeping jet actuators (SJAs), in particular, have steadily been used in turbomachinery ... -
Lean-Burn Combustor Simulator for an Engine-Component Test Facility: An Experimental and Computational Study
(The American Society of Mechanical Engineers (ASME), 1/30/2023 )The computational and experimental assessment of a lean-burn low-NOx combustor simulator for an engine component test facility is presented. The Engine Component Aero-Thermal (ECAT) facility is a full-scale engine-parts ... -
Investigation of a Novel Turbine Housing to Produce a Nonuniform Spanwise Flow Field at the Inlet to a Mixed Flow Turbine and Provide Variable Geometry Capabilities
(The American Society of Mechanical Engineers (ASME), 1/30/2023 )Automotive engine downsizing has placed an increased focus on the ability of the turbocharger to provide adequate boost levels across the full engine operating range. To achieve the desired levels of turbocharger performance, ... -
Numerical Investigations on the Rotating Stall in an Axial Compressor and Its Control by Flow Injection at Casing
(The American Society of Mechanical Engineers (ASME), 11/25/2022)The operating range of a compressor is limited by surge or rotating stall line, among others. Numerical simulations must accurately predict these phenomena. This study is based on the experimental compressor CME2, which ... -
Numerical Investigations on Effect of Inflow Parameters on Development of Secondary Flow Field for Linear Low-Pressure Turbine Cascade
(The American Society of Mechanical Engineers (ASME), 11/25/2022)Endwall flows contribute the most crucial role in loss generation for axial flow turbine and compressor blades. These losses lead to modifying the blade loading and overall performance in terms of stable operating range. ... -
Some Properties of the Exit Velocity Triangle of a Radial Compressor Impeller
(The American Society of Mechanical Engineers (ASME), 11/25/2022)A diagram is described which demonstrates important aspects of the exit velocity triangle of a radial compressor impeller with no inlet swirl. Although this diagram is based on work dating back to 1941, it is not widely ... -
Analysis of Turbomachinery Averaging Techniques
(The American Society of Mechanical Engineers (ASME), 11/25/2022)In this paper, various averaging techniques commonly used in turbomachinery applications are analyzed. It is shown how the work average relates to Miller’s mechanical work potential and that it is, in a certain way, ...