Journal of Turbomachinery: Recent submissions
Now showing items 301-320 of 4519
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Unsteady Flow Mechanism of Corner Separation Control Using Blade End Slots in a Highly Loaded Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2025)Blade end slots have been proven to be an effective method to suppress corner separation, thereby improving the aerodynamic performance of the compressor. The unsteady effects of blade end slots affiliated with a highly ... -
Spectral Heat Transfer Coefficient for Thermal Design Analysis—Part II: Leveraging Diabatic Wall Conditioning for Nonlinear Regime
(The American Society of Mechanical Engineers (ASME), 2024)There are two main issues of interest in the context of Newton's law of cooling as applied to turbine aerothermal designs. First, in a linear aerothermal regime in which both the conventional wisdom in general and the law ... -
Spectral Heat Transfer Coefficient for Thermal Design Analysis—Part 1: Augmenting the Cooling Law for Non-Isothermal Wall
(The American Society of Mechanical Engineers (ASME), 2024)There are two major issues of interest in relation to Newton's law of cooling. The first is its applicability to flow bounded by a nonisothermal wall where the wall surface temperature is nonuniform. The second is the ... -
A Study of Loss Model Parameter Sensitivity in Compressor Unsteady Flow Simulations
(The American Society of Mechanical Engineers (ASME), 2024)This article presents results from a comprehensive sensitivity analysis focused on loss models used in a recently developed compressor unsteady mean line flow model for a transonic axial-centrifugal compressor. The mean ... -
Effect of Flow Distortions on Pin Fins in the Entry Region of Circular Channels
(The American Society of Mechanical Engineers (ASME), 2024)Utilizing heat transfer augmentation features at the inlet of aircraft engines as an additional heat sink requires further understanding of entry region heat transfer and flow field interactions. The effect of asymmetric ... -
Assessment of Additive Manufactured Micro-Channel Characteristics: Impact of Hydraulic Diameter Evaluation
(The American Society of Mechanical Engineers (ASME), 2024)Among internal cooling techniques for gas turbine components, skin cooling is recognized as one of the most promising, especially thanks to the spread of additive manufacturing (AM) techniques. In this regard, several ... -
Impacts of Material and Machine on the Variation of Additively Manufactured Cooling Channels
(The American Society of Mechanical Engineers (ASME), 2024)While additive manufacturing (AM) can reduce component development time and create unique internal cooling designs, the AM process also introduces several sources of variability, such as the selection of machine, material, ... -
Film Cooling and Thermal Performances of a Blade Tip Winglet Operated in an Annular Test Rig and a Test Gas Turbine Power Plant
(The American Society of Mechanical Engineers (ASME), 2024)This paper investigates the film cooling performances and thermal behavior of a blade tip winglet, which was initially investigated in a 1.5-stage experimental axial turbine facility and subsequently also tested in a gas ... -
RANS Capabilities for Transonic Axial Compressor: A Perspective From GPPS Computational Fluid Dynamics Workshop
(The American Society of Mechanical Engineers (ASME), 2024)Reynolds-averaged Navier–Stokes (RANS) simulations currently serve as the prevailing industrial method for simulating axial compressor flows, and this status is expected to persist in the foreseeable future. To evaluate ... -
Impact of Turbine-Strut Clocking and Turbine Outlet Swirl on the Heat Transfer and Film Cooling in an Aggressive Turbine Center Frame
(The American Society of Mechanical Engineers (ASME), 2024)This study focuses on the thermal impact of the clocking position of the high-pressure turbine (HPT) vanes with respect to the turbine center frame (TCF) struts and the thermal impact of the HPT outlet swirl. The TCF is a ... -
Study on the Influence of Volute Throat Jet on Excitation Vibration Alleviation of Radial Turbine Blade
(The American Society of Mechanical Engineers (ASME), 2024)Turbine blade fracture, resulting from high-cycle fatigue (HCF), is the most commonly observed failure mode of turbochargers. In a vaneless turbine, the radial turbine blade is susceptible to HCF under excessive aerodynamic ... -
Flow Mechanism Study on the Effect of Controllable Speed Casing With Different Axial Starting Points on Transonic Compressor Rotor Stability
(The American Society of Mechanical Engineers (ASME), 2024)The controllable speed casing represents an exploring approach to casing technology, designed to enhance the adaptability of casing in compressors under variable working conditions. This paper developed a numerical study ... -
Effects of Ribbed Crossflow Channel in a Turbine Blade on Film Cooling Performance of Diffusion Slot Holes with Various Cross Section Orientations
(The American Society of Mechanical Engineers (ASME), 2024)This paper investigates the influence of ribbed crossflow on the film cooling performance of a turbine rotor blade. A pressure-sensitive paint measurement technique was employed to measure the effectiveness of film cooling. ... -
Analysis of the Bifurcating Duct of an Inlet Particle Separator in Transonic Flow Conditions
(The American Society of Mechanical Engineers (ASME), 2024)To increase the reliability of turboprop and turboshaft engines in extreme operating conditions, filtering protections such as inlet particle separators (IPSs) can be installed at the intake. The flow inside an IPS is ... -
The Unsteady Shock-Boundary Layer Interaction in a Compressor Cascade—Part I: Measurements With Time-Resolved Particle Image Velocimetry
(The American Society of Mechanical Engineers (ASME), 2025)In the first part of this three-paper-series, time-resolved particle image velocimetry (TR-PIV) is performed in the transonic cascade to elucidate the shock-boundary layer interaction process and to provide comparative ... -
Numerical Study on the Effect of Back Cavity on the Aerodynamic Behavior of a Non-Axisymmetric Casing Treatment for Transonic Axial Compressors
(The American Society of Mechanical Engineers (ASME), 2025)For decades, aeronautic engineers have studied the potential of Casing Treatments (CT) to improve the aerodynamic operability of tip-limited compressors. Axial Slot Casing Treatment (or ASCT) has shown very good results ... -
The Unsteady Shock-Boundary Layer Interaction in a Compressor Cascade—Part III: Mechanisms of Shock Oscillation
(The American Society of Mechanical Engineers (ASME), 2025)The shock-boundary layer interaction in transonic flows is known to cause strong unsteady flow effects that negatively affect the performance and operability of blade and cascade designs. Despite decades of research on the ... -
Optimal Riblets Applied to Gas Turbine Compressor Blades Studied via Direct Numerical Simulation (GT2024–122305)
(The American Society of Mechanical Engineers (ASME), 2025)Streamwise micro-groove surfaces (“riblets”) are well known as a passive surface treatment to reduce drag, which may assist in increasing overall gas turbine efficiency. The first direct numerical simulation of micro-scaled ... -
Dirt Ingestion Impacts on Cooling Within a Double-Walled Combustor Liner
(The American Society of Mechanical Engineers (ASME), 2025)Double-walled liners consisting of impingement and effusion cooling are commonly used to cool gas turbine combustor chambers. Engine ingestion of particulates such as dirt, sand, or ash leads to particulate deposition and ... -
Roughness Effects on Dense-Gas Turbine Flow: Comparison of Experiments and Simulations
(The American Society of Mechanical Engineers (ASME), 2025)This article presents a combined numerical and experimental study of the high-subsonic organic vapor flow in a linear turbine cascade. The profile geometry is the well-documented LS59 highly loaded rotor blade and the ...