Journal of Turbomachinery: Recent submissions
Now showing items 281-300 of 4519
-
Flow and Heat Transfer in a Ribbed Converging-Diverging U-Duct Under Rotating and Non-Rotating Conditions
(The American Society of Mechanical Engineers (ASME), 2024)A numerical study based on steady Reynolds-averaged-Navier–Stokes (RANS) with the shear stress transport (SST) turbulence model was performed to investigate the flow and heat transfer in a ribbed U-duct with a rectangular ... -
Convergence Acceleration of Favre-Averaged Non-Linear Harmonic Method
(The American Society of Mechanical Engineers (ASME), 2024)This paper develops a numerical procedure to accelerate the convergence of the Favre-averaged non-linear harmonic (FNLH) method. The scheme provides a unified mathematical framework for solving the sparse linear systems ... -
Unsteady Interaction Between Purge Flow and Secondary Flow in High-Lift Low-Pressure Turbine
(The American Society of Mechanical Engineers (ASME), 2024)The coupling effect between the complex vortex system and the rim purge flow in the endwall region of a high-lift low-pressure turbine (LPT) will significantly influence the evolution of secondary flow and the corresponding ... -
Swirling Flow Effects on the Aeroacoustic Signature of an Aerospike Nozzle
(The American Society of Mechanical Engineers (ASME), 2025)Supersonic nozzles are not always operated at design conditions. The total pressure, temperature, and velocity distributions at the nozzle inlet plane are often characterized by inhomogeneities, conditions dictated by the ... -
Mode Analysis for the Rotating Aerodynamic Disturbance of a Transonic Fan
(The American Society of Mechanical Engineers (ASME), 2024)The non-synchronous blade vibration induced by a rotating aerodynamic disturbance is encountered for the fan of a turbofan engine working at 65% speedline. To analyze the unsteady characteristics, two methods based on the ... -
Scale-Resolving Simulations of Turbulent Flow Retaining the Exact Blade Count With the Time-Inclined Method
(The American Society of Mechanical Engineers (ASME), 2024)Simulations of the T106 low-pressure turbine linear cascade with incoming wakes have been conducted to demonstrate the suitability of the time-inclined method for retaining the exact blade count in scale-resolving simulations. ... -
Influence of Dilution and Effusion Flows in Generating Variable Inlet Profiles for a High-Pressure Turbine
(The American Society of Mechanical Engineers (ASME), 2024)The elevated flow temperatures and pressures exiting gas turbine combustors affect the efficiency and durability of the high-pressure turbine stage. Understanding the effects that result from the upstream dilution and ... -
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 ...