Journal of Turbomachinery: Recent submissions
Now showing items 521-540 of 4519
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Influence of Casing Groove on Rotating Instabilities in a Low-Speed Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2023)Rotating instability (RI) can be regarded as a pre-stall signal because such phenomena are usually detected when a compressor operates at a near-stall point. Since RI is closely relevant to aerodynamic, acoustic, and ... -
Experimental Investigation of a High-Speed Turbine With Rainbow Rotor and Rim Seal Purge Flow
(The American Society of Mechanical Engineers (ASME), 2023)The present paper addresses the experimental and numerical study of the unsteady flow established in a high-pressure turbine stage with rim seal purge. The HPT test section, operated at engine-relevant flow conditions in ... -
Using Machine Learning for Loss Prediction in a Hybrid Meanline Modeling Method to Deliver Improved Radial Turbine Performance Prediction
(The American Society of Mechanical Engineers (ASME), 2023)Low fidelity modeling approaches remain attractive due to an unrivaled ability to predict full turbine performance maps quickly compared to high-fidelity approaches such as computational fluid dynamics (CFD), especially ... -
The Influence of Turbulence and Reynolds Number on Endwall Heat Transfer in a Vane Cascade
(The American Society of Mechanical Engineers (ASME), 2023)Endwall heat transfer measurements have been acquired in a vane cascade over a range of turbulence conditions and Reynolds numbers using an array of small commercial infrared (IR) cameras. The linear cascade was tested ... -
Heat Transfer and Pressure Loss of Additively Manufactured Internal Cooling Channels With Various Shapes
(The American Society of Mechanical Engineers (ASME), 2023)Additive manufacturing (AM) provides the ability to fabricate highly customized internal cooling passages that are relevant to gas turbine components. This experimental study examines the pressure loss and heat transfer ... -
Heat Transfer Coefficient and Adiabatic Wall Temperature Measurements on High-Pressure Turbine Nozzle Guide Vanes With Representative Inlet Swirl and Temperature Distortions
(The American Society of Mechanical Engineers (ASME), 2023)Combustor exit conditions in modern gas turbines are generally characterized by significant temperature distortions and swirl degree, which in turn is responsible for very high turbulence intensities. These distortions ... -
A Comprehensive Analytical Model for Vortex Shedding From Low-Speed Axial Fan Blades
(The American Society of Mechanical Engineers (ASME), 2023)The paper presents a comprehensive analytical model for the characterization of von Karman vortex shedding in the wake of models of low-speed axial fan blades. The elaborated minimal model is based on the Reynolds-averaged ... -
Aerothermal Performance of Axially Varying Winglet-Squealer Blade Tips
(The American Society of Mechanical Engineers (ASME), 2023)High-pressure turbine blades are usually susceptible to secondary flow losses due to fluid flow between the casing and the blade tip. In this study, we have evaluated the performance of several blade tip designs for different ... -
Nonlinear Flutter Analysis of Labyrinth Seals
(The American Society of Mechanical Engineers (ASME), 2023)A simple nonlinear model to describe labyrinth seal flutter has been developed to assess the aeromechanic stability of straight-through labyrinth seals subjected to large gap variations. The model solves the one-dimensional ... -
On the Effect of Side Clearance in the Vaned Diffuser of a Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2023)Environmental and regulatory pressures have prompted original equipment manufacturers (OEMs) to explore highly boosted internal combustion (IC) engines as a means to minimize toxic air pollutants and meet strict legislative ... -
Assessment of Computational Fluid Dynamic Modeling of Multi-Jet Impingement Cooling and Validation With the Experiments
(The American Society of Mechanical Engineers (ASME), 2023)The current study involves numerical and experimental investigations of circular in-line jets impinging on a heated flat plate. The generic configuration is characterized by nine jets, each with a diameter of D = 0.0152 ... -
Investigation of Unsteady Rotor–Stator Interaction and Deterministic Correlation Analysis in a Transonic Compressor Stage
(The American Society of Mechanical Engineers (ASME), 2023)Unsteady blade row interaction (UBRI) has a large impact on performance in high-speed axial compressors. Thus, the influence of UBRI should be accurately predicted in compressor routine design. In this study, the unsteady ... -
Experimental and Computational Investigation of an Advanced Casing Treatment in a Single-Stage High-Speed Compressor
(The American Society of Mechanical Engineers (ASME), 2023)An advanced casing treatment (CT) design was tested in a single-stage, high-speed axial compressor. The geometry of the casing included bent-axial slots applied near the rotor leading edge. Compressor performance and stall ... -
Impact of Operating Conditions and Axial Casing Grooves on the Evolution of Flow Structure Across Blade Rows in an Axial Compressor
(The American Society of Mechanical Engineers (ASME), 2023)Stereo particle image velocimetry (SPIV) measurements in a series of axial planes investigate the impact of operating conditions and semicircular axial casing grooves (ACGs) on the evolution of flow structure across multiple ... -
Collaborative Robust Design Optimization of Blade Geometry and Manufacturing Tolerance for a Transonic Centrifugal Impeller
(The American Society of Mechanical Engineers (ASME), 2023)Turbomachinery components are inevitably subjected to various sources of manufacturing errors. The resultant variations in blade geometry eventually lead to performance degradation. This is especially true for transonic ... -
Experimental Study of Impact of In-Service Deterioration on Aerodynamic Performance of High-Pressure Nozzle Guide Vanes
(The American Society of Mechanical Engineers (ASME), 2023)In this paper we experimentally evaluate the impact of in-service deterioration on the aerodynamic performance of heavily film-cooled high-pressure nozzle guide vanes from large civil jet engines. We study 15 mid-life to ... -
Effects of Part-to-Part Flow Variations on Overall Effectiveness and Life of Rotating Turbine Blades
(The American Society of Mechanical Engineers (ASME), 2023)As firing temperatures in gas turbine engines continue to increase to achieve high efficiencies, components in the main gas path must be protected with cooling flows to ensure lifing targets are met. Manufacturing variations, ... -
The Effects of Hub Profile on the Aerodynamics of Integrated Intermediate Turbine Ducts
(The American Society of Mechanical Engineers (ASME), 2023)The integration design of the intermediate turbine ducts (ITDs) with the first row of the low-pressure turbine vane can significantly reduce the length of the turbine section, thus reducing the weight and drag of the ... -
On the Probabilistic Endurance Prediction Approach for Turbomachinery Blades and Vanes
(The American Society of Mechanical Engineers (ASME), 2023)The design and aeromechanical assessments of turbomachinery blades and vanes comprise a wide range of complex processes that tend to be based on conventional deterministic methods. These processes often provide a “snapshot” ... -
Vane–Probe Interactions in Transonic Flows
(The American Society of Mechanical Engineers (ASME), 2023)In this article, a numerical investigation of the effect of a miniaturized five-hole probe downstream of a transonic low-pressure turbine vane row is presented. First, a numerical calibration of the probe was performed in ...