Journal of Turbomachinery: Recent submissions
Now showing items 81-100 of 4312
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Impact of the Wall-Parallel Length Scale of Roughness on the Development of Turbulent Boundary Layers in Turbines
(The American Society of Mechanical Engineers (ASME), 2024)The detrimental effects of surface roughness on the growth of turbulent boundary layers in turbines, and compressors, are well known. However, robust prediction of these effects can be problematic, especially for surfaces ... -
Film Superposition Characteristics With Laidback Fan-Shaped Holes Under the Influence of Internal Crossflow
(The American Society of Mechanical Engineers (ASME), 2024)In the serpentine passage of actual rotor blades, the coolant at the inlet of the film hole has an internal crossflow. The internal crossflow significantly influences the film cooling effectiveness of multi-row film holes. ... -
Understanding Unsteady Vortex Structure and Shedding Frequency of Cylindrical Hole Film Cooling: Insights From Experimental and Numerical Approaches
(The American Society of Mechanical Engineers (ASME), 2024)To enhance film cooling effectiveness and reduce mixing loss, it is imperative to understand the dynamics of the unsteady vortex system and its interaction with the mainstream flow. In this study, a comprehensive experimental ... -
Aerothermal Performance of Slashface Leakage With Double Surface Angle Under Realistic Swirling Inflow
(The American Society of Mechanical Engineers (ASME), 2024)The turbine vanes being manufactured and assembled piece by piece leads to an unavoidable gap on the vane endwall called slashface. Usually, the coolant leakage introduced from the slashface with a single surface angle ... -
Investigation of the Discharge Coefficient for Laidback Fan-Shaped Holes on Turbine Blades Under Internal Crossflow Condition
(The American Society of Mechanical Engineers (ASME), 2024)The discharge coefficient of laidback fan-shaped holes on turbine blades under internal crossflow conditions is investigated using experimental and numerical simulation methods. The study is conducted on a linear cascade, ... -
High Effectiveness Tip Cooling Using Inclined Slots
(The American Society of Mechanical Engineers (ASME), 2025)The tip of the high-pressure turbine blade is critical for gas turbine performance. Hot gas leaking through the tip gap tends to oxidize and erode the blade while generating significant aerodynamic loss. Squealer tips are ... -
High-Fidelity Investigation of Vortex Shedding From a Highly Loaded Turbine Blade
(The American Society of Mechanical Engineers (ASME), 2025)High-fidelity numerical simulations based on wall-resolved large-eddy simulations (LESs) are used to investigate the vortex shedding dynamics in a linear turbine cascade. The profile geometry is the well-documented LS59 ... -
Turbulence Measurements in Axial Turbines Using Fast Response Aerodynamic Pressure Probes
(The American Society of Mechanical Engineers (ASME), 2025)Improving the comprehension of turbomachinery fluid-dynamics is vital to increase their performance and calls for the development or extension of advanced instrumentation. In this context, novel data acquisition and data ... -
An Active Turbulence Grid for Turbomachinery Flow Experiments
(The American Society of Mechanical Engineers (ASME), 2025)Quantifying and predicting the effects of freestream turbulence on the aerodynamic performance of turbomachinery flows continues to be of primary interest to advance the physical understanding and modeling of loss mechanisms. ... -
Modeling and Simulation of Sand Particle Trajectories and Erosion in a Transonic Fan Stage
(The American Society of Mechanical Engineers (ASME), 2024)In desert regions, there is a significant presence of dust and sand particles lifted by storms and drawn into aircraft engines, resulting in considerable erosion. This numerical study investigates the dynamics of sand ... -
Dissipation in Skewed Boundary Layers
(The American Society of Mechanical Engineers (ASME), 2024)The entropy generation within a turbulent, collateral boundary layer is well understood and is characterized by a dissipation coefficient, Cd. However, it is common for the transverse pressure gradients in turbomachines ... -
Thermohydraulic Performance and Flow Structures of Diamond Pyramid Arrays
(The American Society of Mechanical Engineers (ASME), 2024)Surface features are a common heat transfer enhancement method used in a myriad of applications including gas turbines and heat exchangers. One such style of surface feature is diamond pyramids, which offer significant ... -
Aerodynamic Performance Evaluation of Subsonic Compressor Cascade Blade With Leading-Edge Damage
(The American Society of Mechanical Engineers (ASME), 2024)Material loss at the leading edge of in-service gas-turbine engine blades is detrimental to the aerodynamic performances of compressors. In this study, computational simulations and experiments using pneumatic probes were ... -
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, ...