Journal of Turbomachinery: Recent submissions
Now showing items 241-260 of 4519
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Unique High-Resolution Temperature Mapping of Stage 1 Turbine Vane in a Long-Term Engine Test
(The American Society of Mechanical Engineers (ASME), 2024)In this study, surface temperature maps resulting from a long-term engine test were evaluated on a stage 1 turbine vane using thermal history coatings (THCs). THCs are ceramic-type sensor coatings doped with a lanthanide ... -
Unsteady Flow Structure of Rotating Instability in a 1.5-Stage Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2024)The unsteady flow structure of the rotating instability (RI) in a 1.5-stage axial compressor is investigated through experimental and numerical analyses. In the tested compressor, the total pressure rise of the rotor ... -
Large Eddy Simulation Analysis of Loss Anomaly of a Turbine Blade With Large Trailing Edge Radius
(The American Society of Mechanical Engineers (ASME), 2024)There is great interest in the usage of ceramic matrix composites (CMC) as a turbine blade material. However, depending on the manufacturing process of the CMC, blades may have a thicker trailing edge. The design space ... -
An Experimental Study on the Effects of Nonuniform Vane Spacing on Forced Response Reduction in a Mistuned Rotor Blisk in a Multistage Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2024)Stators with nonuniform vane spacing (NUVS) are known to effectively reduce the forced response of adjacent rotors by spreading the primary engine order (EO) excitation at a certain speed to a series of weaker excitations ... -
Optimized Casing Treatment to Improve Stall Margin Under Circumferential Pressure Distortion in a High-Speed Axial Flow Fan
(The American Society of Mechanical Engineers (ASME), 2024)An optimized axial slot casing treatment (OPCT) was designed that experimentally improves the stall margin by 7.31% with an efficiency gain of 1.94% at a design speed of 100% in a high-speed axial flow fan. Subsequently, ... -
The Effect of Unsteady Inlet Boundary Conditions on the Aero-Thermal Behavior of High-Pressure Turbine Vanes – A Numerical Study Using Scale-Resolving Simulations
(The American Society of Mechanical Engineers (ASME), 2024)This paper presents the application of a novel method to prescribe unsteady boundary conditions to transient, scale-resolving computational fluid dynamics simulations of the high-pressure turbine in modern jet engines. The ... -
Development of Compact and Hermetic Organic Rankine Cycle Turbine Generator With Upgraded Cooling Capability
(The American Society of Mechanical Engineers (ASME), 2025)In this article, a hermetic and oil-free turbine generator for a cryogenic organic Rankine circle (ORC) is suggested and investigated. The generator mainly consists of a high-speed generator, a two-stage supersonic turbine, ... -
Wake–Separation Bubble Interaction Over an Experimentally Simulated Axial Compressor Blade Under Low Reynolds Number Flow
(The American Society of Mechanical Engineers (ASME), 2025)For the most part, the flow over an axial compressor blade is subjected to adverse pressure gradients. Under low Reynolds number conditions, the flow could separate off the blade surface especially on the suction side, ... -
Reassessment of the Conventional: Numerical Validation of a One-Dimensional Model for the Prediction of Volute Losses
(The American Society of Mechanical Engineers (ASME), 2025)The flow inside the volute of a centrifugal compressor is complex and three-dimensional. The fluid follows a swirling flow pattern, and under many operating conditions, the flow quantities are highly inhomogeneous in radial ... -
Analysis of the Instantaneous Film Cooling Effectiveness on Showerhead Film Cooling Using Fast Response Pressure Sensitive Paint
(The American Society of Mechanical Engineers (ASME), 2025)The instantaneous effect of unsteady wakes on film cooling effectiveness using a fast response pressure sensitive paint was studied. Testing was performed in a five-passage, low-speed wind tunnel using five times scaled ... -
Effect of Leading Edge Erosion on the Tip Leakage Flow in a Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2025)The interaction between tip leakage flow and passage flow in axial compressor blade rows creates complex flow mechanisms that impair flow stability. Caused by erosion of the compressor blades, these flow mechanisms become ... -
Roughness Investigations on In-Service High-Pressure Compressor Blades—Part I: An Automated Process for High-Fidelity Roughness Measurements
(The American Society of Mechanical Engineers (ASME), 2025)The two-part publication deals with roughness investigations on in-service high-pressure compressor (HPC) blades, both in terms of measurements and simulations. In this article (Part I), an automated process for performing ... -
Unsteady Flow Mechanism of Impeller Stall Inception in a High-Pressure Ratio Centrifugal Compressor With Bleed Slots
(The American Society of Mechanical Engineers (ASME), 2024)The impeller stall inception in a high-pressure ratio centrifugal compressor with bleed slots was investigated by experiments and unsteady numerical analysis. This study reported that the flow instability of the internal ... -
Numerical Simulations and Sensitivity Analysis of Ice Formation on Fan Blades
(The American Society of Mechanical Engineers (ASME), 2024)In-flight icing, the formation of ice during flight, poses risks to the safety and reliability of aircraft. Due to environmental conditions, ice accumulation occurs on the low-pressure compressor blades of an engine, ... -
Innovative Cavity Modeling for Centrifugal Compressors Aeromechanical Analysis
(The American Society of Mechanical Engineers (ASME), 2024)Centrifugal compressor aeromechanics is playing an increasingly important role in the energy transition scenario, especially when operating with low-molecular-weight gases, such as hydrogen. For these machines, maximum ... -
A Simplified Injection Model for Variable Area Turbine Fluidic Throttling
(The American Society of Mechanical Engineers (ASME), 2024)Previous studies have demonstrated the effectiveness of using fluidic actuators to throttle the flow through a nozzle guide vane, enabling a variable area turbine (VAT) with no moving parts. A simplified model was developed ... -
Biot Number Error in Low-Temperature Inconel Overall Effectiveness Experiments
(The American Society of Mechanical Engineers (ASME), 2025)To predict the performance of turbine materials at engine conditions, experiments are often performed at low-temperature laboratory conditions. In order to ensure the low-temperature, laboratory results accurately predict ... -
Acoustic Modes in an Open Box Cavity With Variable Depth Using Two Distinct Wind Tunnels
(The American Society of Mechanical Engineers (ASME), 2025)Cavity resonances in ducts are a classical problem that has involved researchers from very different fields over time. More recently, the aerospace community became engaged again due to resonances found within the flow ... -
GPU-Accelerated Full-Wheel Large-Eddy Simulations of a Transonic Fan Stage
(The American Society of Mechanical Engineers (ASME), 2025)A single-stage transonic axial-flow fan is simulated using graphic processing unit (GPU)-accelerated wall-modeled large-eddy simulations. The computational meshes are generated using Voronoi diagram-based approach. Two ... -
The Impact of Inflow Unsteadiness on Loss Prediction
(The American Society of Mechanical Engineers (ASME), 2024)Stagnation pressure loss coefficient is still the most commonly used loss metric for performance evaluation and is routinely used to validate simulations. This is because it is easy to measure and readily available from ...