Journal of Turbomachinery: Recent submissions
Now showing items 721-740 of 4519
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Optimization of Rib Shape and Inclination in a Square Duct With Response Surface Methodology
(The American Society of Mechanical Engineers (ASME), 2022)This article conducts numerical investigation coupled with Reynolds-averaged Navier–Stokes method on detailed flow field and heat transfer characteristics of ribbed channel with symmetric ribs mounted on two walls. The ... -
Loss Assessment of the NASA Source Diagnostic Test Configuration Using URANS With Phase-Lagged Assumption
(The American Society of Mechanical Engineers (ASME), 2022)This article presents the study of the Source Diagnostic Test fan rig of the NASA Glenn (NASA SDT). Numerical simulations are performed for the three different outlet guide vane (OGV) geometries (baseline, low count, and ... -
Development of a Lifetime Pressure Sensitive Paint Procedure for High-Pressure Vane Testing
(The American Society of Mechanical Engineers (ASME), 2022)Optical measurements based on fast response pressure sensitive paint (PSP) provide enhanced spatial resolution of the pressure field. This paper presents laser lifetime PSP at 20 kHz, with precise calibrations, and results ... -
Experimental Study of the Endwall Heat Transfer of a Transonic Nozzle Guide Vane With Upstream Jet Purge Cooling Part 2—Effect of Combustor-Nozzle Guide Vane Misalignment
(The American Society of Mechanical Engineers (ASME), 2021)A misalignment between the combustor exit and the nozzle guide vane (NGV) platform commonly exists due to manufacturing tolerances and thermal transience. This study investigated, experimentally and computationally, the ... -
Experimental Study of the Endwall Heat Transfer of a Transonic Nozzle Guide Vane With Upstream Jet Purge Cooling Part 1—Effect of Density Ratio
(The American Society of Mechanical Engineers (ASME), 2021)Nozzle guide vane (NGV) platforms often use complex cooling schemes to mitigate the ever-increasing thermal loads on endwall. Understanding the effect of advanced cooling schemes amid the highly complex three-dimensional ... -
A High-Speed Disk Rotor Rig Design for Tip Aerothermal Research
(The American Society of Mechanical Engineers (ASME), 2021)The relative casing motion can greatly vary the over-tip-leakage (OTL) flow structure and aerothermal performance. The existing tip experimental research facilities including stationary linear cascade, cascade rigs with ... -
Transonic Relief in Fans and Compressors
(The American Society of Mechanical Engineers (ASME), 2021)Every supersonic fan or compressor blade row has a streamtube, the “sonic streamtube,” which operates with a blade relative inlet Mach number of one. A key parameter in the design of the “sonic streamtube” is the area ratio ... -
Erratum: “Scaling Roughness Effects on Pressure Loss and Heat Transfer of Additively Manufactured Channels” [J. Turbomach. 139(2), p. 021003
(The American Society of Mechanical Engineers (ASME), 2022)There is an error in the original paper in the description of the applicability range for Eq. (9) that could misguide the reader. The valid range of Eq. (9) is Ra/Dh > -
Aerodynamics and Heat Transfer Inside a Gas Turbine Mid-Passage Gap
(The American Society of Mechanical Engineers (ASME), 2021)Gas turbine blades and vanes are typically manufactured with small clearances between adjacent vane and blade platforms, termed the mid-passage gap. The mid-passage gap reduces turbine efficiency and causes significant ... -
Impacts of Tandem Configurations on the Aerodynamic Performance of an Axial Supersonic Through-Flow Fan Cascade
(The American Society of Mechanical Engineers (ASME), 2021)In the current study, the tandem blade technology is applied to an supersonic throughflow fan (STFF) tandem cascade for the first time and a 2D STFF tandem cascade is preliminarily designed. Through the modification design ... -
Convection in Scaled Turbine Internal Cooling Passages With Additive Manufacturing Roughness
(The American Society of Mechanical Engineers (ASME), 2021)Additive manufacturing processes, such as direct metal laser sintering (DMLS), enable the creation of novel turbine cooling internal passages and systems. However, the DMLS method produces a significant and unique surface ... -
Stator Blades Manufacturing Geometrical Variability in Axial Compressors and Impact on the Aeroelastic Excitation Forces
(The American Society of Mechanical Engineers (ASME), 2021)The manufacturing geometrical variability is a source of uncertainty, which cannot be avoided in the realization of machinery components. Deviations of a part geometry from its nominal design are inevitably present due to ... -
Direct and Inverse Model for Single-Hole Film Cooling With Machine Learning
(The American Society of Mechanical Engineers (ASME), 2021)The direct prediction model for adiabatic film cooling effectiveness distribution and inverse prediction model for design parameters are studied in this article. Convolutional neural networks (CNNs) are trained on a set ... -
Effect of Manufacturing Tolerance in Flow Past a Compressor Blade
(The American Society of Mechanical Engineers (ASME), 2021)This paper presents the effect of manufacturing tolerance on performance and stability boundaries of a transonic fan using a Reynolds-averaged Navier–Stokes simulation. The effects of tip gap and stagger angle variations ... -
Endwall Heat Transfer and Cooling Performance of a Transonic Turbine Vane With Upstream Injection Flow
(The American Society of Mechanical Engineers (ASME), 2021)Flow fields near the turbine vane endwall region are very complicated due to the presence of high three-dimensional passage vortices and endwall secondary flows. This makes it challenging for the endwall to be effectively ... -
Detecting Multidimensional Pareto Fronts During the Optimization of a Return Channel Within a Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2021)We explain the advantages of using big-data methods for evaluating numerical optimization. The investigation focuses on the performance potential of three-dimensional return channel vanes under realistic manufacturing ... -
Statistical and Computational Evaluation of Empirical Axial Turbine Correlations in Design of Centrifugal Turbines
(The American Society of Mechanical Engineers (ASME), 2021)Centrifugal turbines have recently regained interest of the engineering community as they could serve as cost-effective alternatives in diverse energy applications. In this device, the working fluid expands in a centrifugal ... -
The Influence of Deterministic Surface Roughness and Freestream Turbulence on Transitional Boundary Layers: Heat Transfer Distributions and a New Transition Onset Correlation
(The American Society of Mechanical Engineers (ASME), 2021)Heat transfer measurements in transitional flat plate boundary layers subjected to surface roughness, strong pressure gradients, and freestream turbulence are presented. The surfaces considered consist of a smooth reference ... -
Reviewer’s Recognition
(The American Society of Mechanical Engineers (ASME), 2022)The Editor-in-Chief and Editorial Board of the ASME Journal of Turbomachinery would like to thank all of the reviewers for volunteering their expertise and time reviewing manuscripts in 2021. Serving as reviewers for the ... -
Comparison of Film Cooling Performance for Different Purge Slot Configurations in a Cylindrical and State-of-the-Art Nozzle Guide Vane
(The American Society of Mechanical Engineers (ASME), 2021)This comparative study is concerned with the advances in nozzle guide vane (NGV) design developments and their influence on endwall film cooling performance by injecting coolant through the purge slot. This experimental ...