Journal of Turbomachinery: Recent submissions
Now showing items 661-680 of 4519
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Experimental and Computational Investigation of Film Cooling Performance and External Flowfield Effects Due to Impingement Coolant Feed in the Leading Edge of a Turbine Blade
(The American Society of Mechanical Engineers (ASME), 2022)The effects that leading-edge impingement coolant feeds have on the external flowfield and on film cooling performance in the showerhead have not been studied thoroughly in the literature. To isolate the influence of the ... -
Morphing of Reversible Axial Fan Blade: A FSI-FEM Study
(The American Society of Mechanical Engineers (ASME), 2022)Reversible axial fans are widely used in industrial and tunnel ventilation systems, and a lot of research effort is spent in the design process of the blades shape and blades profile. The target is to achieve reasonable ... -
Overview of The Best 2020 Axial-Flow Fan Data and Inclusion in Similarity Charts for the Search of the Best Design
(The American Society of Mechanical Engineers (ASME), 2022)This article deals with the aerodynamic performance of ducted axial-flow fans available in the 2020 market and aims to create a general picture of the best designs and design trends, as a tool for fan designers. To this ... -
Computer 3D Vision-Aided Full-3D Optimization of a Centrifugal Impeller
(The American Society of Mechanical Engineers (ASME), 2022)A computer three-dimensional (3D) vision-aided performance prediction framework for turbomachinery is established in this paper, to improve the accuracy and generalization ability of the artificial neural network (ANN) ... -
Numerical Calibration and Investigation of the Influence of Reynolds Number on Measurements With Five-Hole Probes in Compressible Flows
(The American Society of Mechanical Engineers (ASME), 2022)This paper presents an investigation into the numerical and experimental calibration of a five-hole probe and effects of Reynolds number variations on the characteristics of the probe. The test object is a cone-type drilled ... -
Heat Transfer in Rotating, Trailing Edge, Converging Channels With Full- and Partial-Height Strip-Fins
(The American Society of Mechanical Engineers (ASME), 2022)A wide variety of pin-fins have been used to enhance heat transfer in internal cooling channels. However, due to their large blockage in the flow direction, they result in an undesirable high pressure drop. This experimental ... -
Design and Testing of a Multi-Stage Intermediate Pressure Turbine for Future Geared Turbofans
(The American Society of Mechanical Engineers (ASME), 2022)The multi-stage intermediate pressure turbine (IPT) is a key enabler of the thermodynamic cycle in geared turbofan engine architectures, where fan and turbine rotational speeds become decoupled by using a power gearbox ... -
Effect of the Axial Casing Groove Geometry on the Production and Distribution of Reynolds Stresses in the Tip Region of an Axial Compressor Rotor
(The American Society of Mechanical Engineers (ASME), 2022)Stereo-PIV data are used for investigating the effect of axial casing groove (ACG) geometry on the distribution, evolution, and production rates of turbulent kinetic energy (TKE) and Reynolds stresses near a rotor tip. The ... -
Effects on Film Cooling Performance in the Showerhead From Geometric Parameterization of Shaped Hole Designs
(The American Society of Mechanical Engineers (ASME), 2022)The high heat loads at the leading-edge regions of turbine vanes and blades necessitate the most robust thermal protection, typically accomplished via a dense array of film cooling holes, nicknamed the “showerhead.” Although ... -
Effect of Coolant Crossflow on Film Cooling Effectiveness of Diffusion Slot Hole With and Without Ribs
(The American Society of Mechanical Engineers (ASME), 2022)The coolant flow condition at the film hole entrance has a notable effect on film cooling effectiveness. The previous studies about internal ribbed crossflow effects are the hole with a circular inlet cross section. In ... -
Analysis of the Loss Production Mechanism Due to Cavity–Main Flow Interaction in a Low-Pressure Turbine Stage
(The American Society of Mechanical Engineers (ASME), 2022)In the present work, URANS simulations are presented to describe the unsteady interaction process between the flow ingested/ejected from a cavity system and the main flow evolving into a low-pressure turbine stage. Particular ... -
A Comprehensive Analytical Shock Loss Model for Axial Compressor Cascades
(The American Society of Mechanical Engineers (ASME), 2022)The approach applied in various research papers that model compressor shock losses is valid only for certain types of airfoil cascades operating in a narrow range of working conditions. Lately, more general shock loss ... -
Flow Non-Uniformity and Secondary Flow Characteristics Within a Serpentine Cooling Channel of a Realistic Gas Turbine Blade
(The American Society of Mechanical Engineers (ASME), 2022)Unlike the ideal conditions considered in most previous studies, the actual cooling flow passage inside gas turbine blades is extremely complex. This complexity is due to the geometrical restrictions resulting from the ... -
Experimental and Computational Investigation of Integrated Internal and Film Cooling Designs Incorporating a Thermal Barrier Coating
(The American Society of Mechanical Engineers (ASME), 2022)Few studies in the open literature have studied the effect of thermal barrier coatings (TBC) when used in combination with shaped hole film cooling and enhanced internal cooling techniques. The current study presents ... -
Automatic Design Optimization of a Transonic Compressor Rotor for Improving Aeroacoustic and Aerodynamic Performance
(The American Society of Mechanical Engineers (ASME), 2022)Multidisciplinary design optimization of transonic rotors, especially focusing on improving the aeroacoustic performance, has received little attention. This article employs an automatic design optimization approach to ... -
Experimental and Numerical Similitude Study Using a Novel Turbocompressor Test Facility Operating With Helium–Neon Gas Mixtures
(The American Society of Mechanical Engineers (ASME), 2022)A novel turbocompressor test facility has been designed for helium–neon gas mixtures, and its specific features are presented. To account for the heat transfer originating from the motor coolant, a surrogate model has been ... -
Effect of a Ceramic Matrix Composite Surface on Film Cooling
(The American Society of Mechanical Engineers (ASME), 2022)Ceramic matrix composite (CMC) parts create the opportunity for increased turbine entry temperatures within gas turbines. To achieve the highest temperatures possible, film cooling will play an important role in allowing ... -
Reduced-Order Models for Effusion Modeling in Gas Turbine Combustors
(The American Society of Mechanical Engineers (ASME), 2022)Effusion cooling represents the state-of-the-art for liner cooling technology in modern combustion chambers, combining a more uniform film protection of the wall and a significant heat sink effect by forced convection ... -
Experimental Investigation of the Pre-Stall and Stall Evolution in a Centrifugal Compressor With a Volute
(The American Society of Mechanical Engineers (ASME), 2022)Stall and surge behaviors deteriorate the compressor performance and stability of the operating range. To avoid the effect of stall and surge behaviors, the characteristics of the pre-stall disturbance have been considered ... -
Forced Response Due to Vane Stagger Angle Variation in an Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2022)Recent developments in turbomachinery design require an improved prediction accuracy of blade vibrations to maintain safe operations. This article aims to investigate the accuracy of numerical aeroelastic approaches for ...