Journal of Turbomachinery: Recent submissions
Now showing items 621-640 of 4519
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Study on Effects of Spanwise-Expansion Parameters on Film Cooling Effectiveness of Diffusion Shaped Hole Configurations
(The American Society of Mechanical Engineers (ASME), 2022)Diffusion shaped holes are widely used on aero-engine turbine blades for film cooling. The effect of the spanwise-expansion angle and spanwise width of the hole exit on the film cooling effectiveness of diffusion shaped ... -
High-Fidelity Simulation Study of the Unsteady Flow Effects on High-Pressure Turbine Blade Performance
(The American Society of Mechanical Engineers (ASME), 2022)Unsteadiness, in the form of both broadband background disturbances and discrete coherent wakes, can have a strong effect on the performance of turbomachinery blades. The influence of the incoming flow has received much ... -
A Data-Driven Tip Flow Loss Prediction Method for a Transonic Fan Under Boundary Layer Ingesting Inflow Distortion
(The American Society of Mechanical Engineers (ASME), 2022)In a boundary layer ingesting (BLI) propulsion system, the fan blades need to operate continuously under large-scale inflow distortion. The distortion will lead to serious aerodynamic losses in the fan, degrading the fan ... -
Effect of Temperature and Velocity on Microparticle Erosion/Deposition into EnvironmentalBarrierCoated Ceramic Matrix Composite for Aeroengines
(The American Society of Mechanical Engineers (ASME), 2022)Ceramic matrix composites (CMCs), especially SiC/SiC, have garnered significant attention owing to their remarkable mechanical properties at higher temperatures. For the protection of the substrate from oxidation, the ... -
The Effect of Gas and Surface Temperature on ColdSide and HotSide Turbine Deposition
(The American Society of Mechanical Engineers (ASME), 2022)Deposition studies were conducted using two impingement jet facilities: a 60 m/s cold jet (830–950 K) impinging on a heated HastelloyX surface (1033–1255 K) and a 215 m/s hot jet (1450–1625 K) impinging on an uncooled ... -
Effects of Sideslip Direction on a Rear Fuselage Boundary Layer Ingesting Fan
(The American Society of Mechanical Engineers (ASME), 2022)Boundary layer ingestion (BLI) offers potential reductions in fuel burn and emissions. The propulsive fuselage concept features an aft fan that ingests the 360 deg fuselage boundary layer. A critical condition for this ... -
Highly Time Resolved, Combined Temperature, and Heat Flux Measurement Technique Based on ALTP Sensors
(The American Society of Mechanical Engineers (ASME), 2022)This study demonstrates a new methodology for the simultaneous direct measurement of temperature and heat flux within the same sensing element of heat flux sensors. The methodology is demonstrated for fastresponse atomic ... -
Fan Stability Enhancement With Partial Casing Treatments
(The American Society of Mechanical Engineers (ASME), 2022)Casing treatments are used to extend the stability margin of fans or compressors. These typically have an axisymmetric arrangement, but for a fan exposed to nonaxisymmetric distortion, a casing treatment applied to a ... -
Extending Highly Loaded Axial Fan Operability Range Through Novel Blade Design
(The American Society of Mechanical Engineers (ASME), 2022)The tip clearance size has historically been considered to be the main factor affecting stability range in axial fan and compressors. This paper reveals that the stall characteristics are defined by the axial momentum flux ... -
Loss Analysis of Cavity Leakage Flow in a Compressor Cascade
(The American Society of Mechanical Engineers (ASME), 2022)The cavity flow of shrouded stators is quite complex and not yet completely understood, especially for its loss characteristics. In this paper, a matrix of numerical simulations was designed and conducted to investigate ... -
A TurboOriented DataDriven Modification to the Spalart–Allmaras Turbulence Model
(The American Society of Mechanical Engineers (ASME), 2022)The Spalart–Allmaras (SA) turbulence model is one of the most popular models applied to compressors, but it often overpredicts blockage size and hence underpredicts the stall margin. In this paper, a novel modification to ... -
Experimental Investigation Into the Effect of a Ceramic Matrix Composite Surface on Film Cooling
(The American Society of Mechanical Engineers (ASME), 2022)Ceramic matrix composite (CMC) components enable high turbine entry temperatures, which can lead to improved efficiencies in gas turbines. Implementing film cooling over CMC components, similar to how it is employed for ... -
Fan Stability With Leading Edge Damage: Blind Prediction and Validation
(The American Society of Mechanical Engineers (ASME), 2022)This paper considers the impact of a damaged leading edge (LE) on the stall margin and stall inception mechanisms of a transonic, low-pressure ratio fan. The damage takes the form of a squared-off leading edge over the ... -
An Iterative Neural Operator to Predict the Thermo-Fluid Information in Internal Cooling Channels
(The American Society of Mechanical Engineers (ASME), 2022)The design of internal cooling channels played an important role in turbine cooling. Distributions of thermo-fluid information, including surface distributions, cross section distributions, and projected distributions are ... -
Uncertainty Quantification on the Cooling Performance of a Transonic Turbine Vane With Upstream Endwall Misalignment
(The American Society of Mechanical Engineers (ASME), 2022)With increasing aerodynamic and thermal loads, film cooling has been a popular technology integrated into the design of the modern gas turbine vane endwall, especially for the first-stage vane endwall. A staggering amount ... -
Adiabatic Effectiveness Measurements for a Baseline Shaped Film Cooling Hole
(The American Society of Mechanical Engineers (ASME), 2022)Film cooling on airfoils is a crucial cooling method as the gas turbine industry seeks higher turbine inlet temperatures. Shaped film cooling holes are widely used in many designs given the improved performance over that ... -
An Approximate Time Domain Nonlinear Harmonic Method for Analyzing Unsteady Flows With Multiple Fundamental Modes
(The American Society of Mechanical Engineers (ASME), 2022)In this article, a new hybrid time and frequency domain method called the approximate time domain nonlinear harmonic method is proposed for a robust and efficient analysis of turbomachinery unsteady flow with more than one ... -
High-Fidelity Computational Fluid Dynamics Analysis of In-Serviced Shrouded High-Pressure Turbine Rotor Blades
(The American Society of Mechanical Engineers (ASME), 2022)In-service deterioration can lead to undesired shape variations on high-pressure turbine rotor blades. This can have a significant impact on efficiency, power generation, and component life. Loss of power production from ... -
Sensitivity of Adiabatic Cooling Effectiveness to Mainstream and Coolant Temperatures in Transonic Flow Over an Idealized Blade Tip Model
(The American Society of Mechanical Engineers (ASME), 2022)Film cooling, as a key technology to ensure turbine survival in new generation gas turbines, has been studied profusely in subsonic flows. But in transonic flow, the determination of adiabatic cooling effectiveness faces ... -
Numerical Modeling and Design Challenges of Boundary Layer Ingesting Fans
(The American Society of Mechanical Engineers (ASME), 2022)Studies show that boundary layer ingesting (BLI) propulsion can provide significant fuel burn reduction relative to pylon-mounted turbofan engines. However, this type of propulsion can lead to serious difficulties and ...