Journal of Turbomachinery: Recent submissions
Now showing items 781-800 of 4519
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Uncertainty Evaluation on Multi-Hole Aerodynamic Pressure Probes
(The American Society of Mechanical Engineers (ASME), 2021)In the frame of a continuous improvement of the performance and accuracy in the experimental testing of turbomachines, the uncertainty analysis on measurements instrumentation and techniques is of paramount importance. For ... -
Free-Stream Turbulence-Induced Boundary-Layer Transition in Low-Pressure Turbines
(The American Society of Mechanical Engineers (ASME), 2021)The aerodynamic efficiency of turbomachinery blades is profoundly affected by the occurrence of laminar-turbulent transition in the boundary layer since skin friction and losses rise for the turbulent state. Depending on ... -
Experimental Study on Film Cooling Effectiveness of Blade With Chevron-Shaped Holes Under Wake Influence
(The American Society of Mechanical Engineers (ASME), 2021)Gas turbines have been widely used. With the continuous improvement of the performance of gas turbines, the turbine inlet temperature has greatly exceeded the heat-resistance limit of the turbine blade material, so advanced ... -
Heat Transfer in a Rotating, Two-Pass, Variable Aspect Ratio Cooling Channel With Profiled V-Shaped Ribs
(The American Society of Mechanical Engineers (ASME), 2021)The thermal performance of two V-type rib configurations is measured in a rotating, two-pass cooling channel. The coolant travels radially outward in the rectangular first pass (aspect ratio (AR—channel width:height) = ... -
A Machine-Learnt Wall Function for Rotating Diffusers
(The American Society of Mechanical Engineers (ASME), 2021)Data-driven tools and techniques have proved their effectiveness in many engineering applications. Machine-learning has gradually become a paradigm to explore innovative designs in turbomachinery. However, industrial ... -
High-Fidelity Simulations of Multi-Jet Impingement Cooling Flows
(The American Society of Mechanical Engineers (ASME), 2021)This article shows the first parametric study on turbulent multi-jet impingement cooling flows using large-eddy simulations (LES). We focus on assessing the influence of the inter-jet distance and the cross-flow conditions ... -
Application of Scale Adaptive Simulation Model to Studying Cooling Characteristics of a High Pressure Turbine Blade Cutback Trailing Edge With Different Cooling Configurations
(The American Society of Mechanical Engineers (ASME), 2021)Effective cooling structure design in the trailing edge (TE) of a high pressure turbine (HPT) blade is essential to increase turbine efficiency and maintain structural integrity. To obtain efficient cooling structures and ... -
Aerodynamic Effects of an Incoming Vortex on Turbines With Different Tip Geometries
(The American Society of Mechanical Engineers (ASME), 2021)Experimental and numerical methods were used to investigate the aerodynamic effects of a near-casing streamwise incoming vortex flow on the tip leakage flow of different tip geometries in an unshrouded high-pressure turbine. ... -
Numerical and Experimental Study on Rotating Stall in Industrial Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2021)Centrifugal compressors employed in the oil and gas industry are operated at high gas pressure conditions and are used in a wide operation range. Accurate prediction of the rotating stall and the destabilizing aerodynamic ... -
Uncertainty Quantification of Spalart–Allmaras Turbulence Model Coefficients for Compressor Stall
(The American Society of Mechanical Engineers (ASME), 2021)The turbulence model in Reynolds-averaged Navier–Stokes simulations is crucial in the prediction of the compressor stall margin. In this paper, parametric uncertainty of the Spalart–Allmaras turbulence model in predicting ... -
Large-Eddy Simulation of Variable Speed Power Turbine Cascade With Inflow Turbulence
(The American Society of Mechanical Engineers (ASME), 2021)Numerical results are presented from the National Aeronautics and Space Administration (NASA) Glenn Research Center's in-house turbomachinery code Glenn-HT applied to the variable-speed power turbine (VSPT) experiment at ... -
Heat Transfer Measurements Using Multiple Thermochromic Liquid Crystals in Symmetric Cooling Channels
(The American Society of Mechanical Engineers (ASME), 2021)The transient thermochromic liquid crystal (TLC) method is applied to determine the distribution of the local heat transfer coefficients using a configuration with parallel cooling channels at an engine-relevant Reynolds ... -
Steady and Unsteady Temperature Measurements in the Wake of a Linear Cascade With Heated Airfoils
(The American Society of Mechanical Engineers (ASME), 2021)Understanding basic aerodynamic and thermodynamic processes in engine components is critical to achieving higher efficiencies and lower fuel consumption in aircraft engines. To aid in this process, a linear compressor ... -
Reconstructing Compressor Nonuniform Circumferential Flow Field From Spatially Undersampled Data—Part 2: Practical Application for Experiments
(The American Society of Mechanical Engineers (ASME), 2021)In the previous part of the paper, a novel method to reconstruct the compressor nonuniform circumferential flow field using spatially undersampled data points is developed. In this part of the paper, the method is applied ... -
Reconstructing Compressor Non-Uniform Circumferential Flow Field From Spatially Undersampled Data—Part 1: Methodology and Sensitivity Analysis
(The American Society of Mechanical Engineers (ASME), 2021)The flow field in a compressor is circumferentially non-uniform due to the wakes from upstream stators, the potential field from both upstream and downstream stators, and blade row interactions. This non-uniform flow impacts ... -
The Influence of Element Thermal Conductivity, Shape, and Density on Heat Transfer in a Rough Wall Turbulent Boundary Layer With Strong Pressure Gradients
(The American Society of Mechanical Engineers (ASME), 2021)Formation mechanisms for turbine roughness are manifold, including erosion, corrosion, deposition, and spallation or more recently additive manufacturing processes. Consequently, the resulting surfaces differ remarkably ... -
Erratum: “Secondary Flows, Endwall Effects, and Stall Detection in Axial Compressor Design” [ASME J. Turbomach. 2015, 137(5), p. 051004; DOI: 10.1115/1.4028648]
(The American Society of Mechanical Engineers (ASME), 2021)In the published paper, the expressions listed under (51) were miswritten. The correct version is (51)–for a rotor:–for a stator:(w2/w1)T<Ctc(WRmin)T/1.3(w2/w1)A<(WRmin)A(w2/w1)H<(WRmin)H/1.3(w2/w1)T<(WRmin)T ... -
Pulsed Impingement Turbine Cooling and Its Effect on the Efficiency of Gas Turbines With Pressure Gain Combustion
(The American Society of Mechanical Engineers (ASME), 2021)Performance improvements of conventional gas turbines are becoming increasingly difficult and costly to achieve. Pressure gain combustion (PGC) has emerged as a promising technology in this respect, due to the higher thermal ... -
A Sector-Cascade Test Rig for Measurements of Heat Transfer in Turbine Center Frames
(The American Society of Mechanical Engineers (ASME), 2021)The turbine center frame (TCF) is an inherent component of turbofan aircraft engines and is used for connecting the high-pressure turbine (HPT) to the low-pressure turbine (LPT). Its position immediately downstream of the ... -
Investigation of Film Cooling Using Time-Resolved Stereo Particle Image Velocimetry
(The American Society of Mechanical Engineers (ASME), 2021)In the present study, an existing test rig at the Institute of Thermal Turbomachinery (ITS), Karlsruhe Institute of Technology (KIT), designed for generic film cooling studies is adopted to accommodate time-resolved ...