Journal of Turbomachinery: Recent submissions
Now showing items 701-720 of 4519
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Surface Heater Fabrication Using Micro-Lithography for Transpiration Cooling Heat Transfer Coefficient Measurements
(The American Society of Mechanical Engineers (ASME), 2022)Transpiration cooling is able to provide more uniform coolant coverage than film cooling to effectively protect the component surface from contacting the hot gas. Due to numerous coolant ejection outlets within a small ... -
Improved Prediction of Losses With Large Eddy Simulation in a Low-Pressure Turbine
(The American Society of Mechanical Engineers (ASME), 2022)There is a need to improve predictions of losses resulting from large eddy simulations (LES) of low-pressure turbines (LPT) in gas turbines. This may be done by assessing the accuracy of predictions against validation data ... -
The Influence of Purge Flow Parameters on Heat Transfer and Film Cooling in Turbine Center Frames
(The American Society of Mechanical Engineers (ASME), 2022)The imperative improvement in the efficiency of turbofan engines is commonly facilitated by increasing the turbine inlet temperature (TIT). This development has reached a point where also components downstream of the ... -
Effect of Rotation on Heat Transfer in AR = 2:1 and AR = 4:1 Channels Connected by a Series of Crossover Jets
(The American Society of Mechanical Engineers (ASME), 2022)Detailed heat transfer measurements using transient liquid crystal thermography were performed on a novel cooling design covering the mid-chord and trailing edge region of a typical gas turbine blade under stationary and ... -
Investigation on Mode Characteristics of Rotating Instability and Rotating Stall in an Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2022)Rotating instability (RI) and rotating stall (RS) are two types of aerodynamic instability in axial compressors. The former features the side-by-side peaks below the blade passing frequency (BPF) in frequency spectra, and ... -
Comparative Study of Tip Injection in a Transonic and Subsonic Compressor
(The American Society of Mechanical Engineers (ASME), 2022)Discrete tip injection is an effective method to enhance stability of compressors. This study compares the effects of injection parameters on compressor performance and underlying mechanisms in two different compressors. ... -
Aeroelastic Aspects of Axial Compressor Stage With Self-Recirculating Casing Treatment
(The American Society of Mechanical Engineers (ASME), 2022)For successful implementation of casing treatment designs in axial compressors, apart from the stall margin improvement benefits, aeroelasticity also plays a major role. This manuscript addresses the not often discussed ... -
Blade Envelopes Part II: Multiple Objectives and Inverse Design
(The American Society of Mechanical Engineers (ASME), 2022)Blade envelopes offer a set of data-driven tolerance guidelines for manufactured components based on aerodynamic analysis. In Part I of this two-part paper, a workflow for the formulation of blade envelopes is described ... -
Blade Envelopes Part I: Concept and Methodology
(The American Society of Mechanical Engineers (ASME), 2022)Blades manufactured through flank and point milling will likely exhibit geometric variability. Gauging the aerodynamic repercussions of such variability, prior to manufacturing a component, is challenging enough, let alone ... -
A New Loss Generation Body Force Model for Fan/Compressor Blade Rows: Application to Uniform and Non-Uniform Inflow in Rotor 67
(The American Society of Mechanical Engineers (ASME), 2022)Despite advances in computational power, the cost of time-accurate flows in axial compressor and fan stages with spatially non-uniform inflow is still too high for design-stage use in industry. Body force modeling reduces ... -
Correlating Time-Resolved Pressure Measurements With Rim Sealing Effectiveness for Real-Time Turbine Health Monitoring
(The American Society of Mechanical Engineers (ASME), 2022)Purge flow is bled from the upstream compressor and supplied to the under-platform region to prevent hot main gas path ingress that damages vulnerable under-platform hardware components. A majority of turbine rim seal ... -
Very Large Eddy Simulation of Aero-Thermal Performance in Squealer Tip Gap
(The American Society of Mechanical Engineers (ASME), 2022)To improve the resolution accuracy and get deep insight into the flow structures in squealer tip gap, the very large Eddy simulation (VLES) method was implemented into the commercial computational fluid dynamics (CFD) ... -
Aero-Structural Coupling Strategy for a Morphing Blade Cascade Study
(The American Society of Mechanical Engineers (ASME), 2022)The coupling of aerodynamics and structural mechanics is an important step in the design process of aeronautical devices with morphing parts. In this article, a 2D–3D coupling approach is developed to study a morphing blade ... -
Efficiency Scaling: Influence of Reynolds and Mach Numbers on Fan Performance
(The American Society of Mechanical Engineers (ASME), 2022)The efficiency, pressure ratio, and shaft power of a fan depends on type, size, working medium, and operating condition. For acceptance tests, a dissimilarity in Reynolds number, Mach number, relative roughness, and relative ... -
Efficient Uncertainty Quantification and Sensitivity Analysis on the Aerothermal Performance of Turbine Blade Squealer Tip
(The American Society of Mechanical Engineers (ASME), 2022)It is important to accurately estimate the impact of flow and geometric variations for engineering design and manufacture. In this paper, an efficient uncertainty quantification analysis framework based on the combination ... -
The Effects of Incoming Vortex and Wake on the Aerodynamics of an Intermediate Turbine Duct
(The American Society of Mechanical Engineers (ASME), 2022)In a high bypass ratio aircraft engine, the high-pressure and low-pressure turbines are connected by an intermediate turbine duct (ITD). The aerodynamic performance of the ITD is affected by the incoming flow from the ... -
Analysis of Averaging Methods for Nonuniform Total Pressure Fields
(The American Society of Mechanical Engineers (ASME), 2022)A common objective in the analysis of turbomachinery components (nozzle guide vanes (NGVs) or rotor blades, for example) is to calculate performance parameters, such as total pressure or kinetic energy (KE) loss coefficients, ... -
Method for Determining Adiabatic Film Effectiveness in Presence of Thermal Boundary Layer
(The American Society of Mechanical Engineers (ASME), 2022)In this paper, we present a new method for determining adiabatic film effectiveness in film cooling experiments with nonuniform inlet temperature distributions, in particular the situation of an inlet thermal boundary ... -
Experimental and Numerical Analysis of Loss Characteristics of Cooled Transonic Nozzle Guide Vanes
(The American Society of Mechanical Engineers (ASME), 2022)This article presents high-fidelity experimental traverse measurements downstream of an annular cascade of transonic nozzle guide vanes (NGVs) from a high-pressure (HP) turbine stage. The components are heavily cooled real ... -
On the Divergence Mechanisms Analysis of a Vibrating Blade Subjected to Repetitive Rubs With an Abradable Coating
(The American Society of Mechanical Engineers (ASME), 2022)Aeronautical compressor fans, currently, operate with minimal blade–casing clearance. Therefore, this makes the occurrence of rub events very likely. Under specific circumstances, the blade undergoes excessive amplification ...