Journal of Turbomachinery: Recent submissions
Now showing items 841-860 of 4519
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The Impact of Various Modeling Decisions on Flow Field Predictions in a Centrifugal Compressor
(The American Society of Mechanical Engineers (ASME), 2021)Computational tools have become increasingly important in design and research applications in recent years due to increasing computational resources. In most cases, model geometry and flow physics are simplified to reduce ... -
Infrared Temperature Measurements of the Blade Tip for a Turbine Operating at Corrected Engine Conditions
(The American Society of Mechanical Engineers (ASME), 2021)A high-speed infrared camera is used to measure the temperature of blade tips in a cooled high-pressure turbine operating at corrected engine conditions in The Ohio State University short duration Turbine Test Facility. ... -
Aerodynamic Investigation of a Composite Low-Speed Fan for UHBR Application
(The American Society of Mechanical Engineers (ASME), 2021)A composite fan stage representative of a modern Ultra High Bypass Ratio (UHBR) architecture has been investigated experimentally on a novel test facility at Ecole Centrale de Lyon. These measurements show indications for ... -
Ice-Crystal Icing Investigation on a Honeywell Uncertified Research Engine in an Altitude Simulation Icing Facility
(The American Society of Mechanical Engineers (ASME), 2021)A Honeywell Uncertified Research Engine was exposed to various ice-crystal conditions in the NASA Propulsion Systems Laboratory (PSL). Simulations using NASA's one-dimensional (1D) Icing Risk Analysis tool were used to ... -
Design of a Tip Appendage for the Control of Tip Leakage Vortices in Axial Flow Fans
(The American Society of Mechanical Engineers (ASME), 2021)This article reports on numerical investigations of passive control techniques used for the performance enhancement of a large diameter axial flow cooling fan through modification of the blade tip geometry. Using open-source ... -
Heat Transfer in Rotating, Trailing-Edge, Converging Channels With Smooth Walls and Pin-Fins
(The American Society of Mechanical Engineers (ASME), 2021)The heat transfer and pressure drop characteristics of a rotating cooling channel that has an angled trapezoidal cross section and converges from the hub to the tip in both the streamwise and spanwise directions are ... -
Higher Order Conceptual Model for Labyrinth Seal Flutter
(The American Society of Mechanical Engineers (ASME), 2021)A simple nondimensional model to describe the flutter onset of two-fin straight labyrinth seals (Corral, R., and Vega, A., 2018, “Conceptual Flutter Analysis of Labyrinth Seals Using Analytical Models. Part I: Theoretical ... -
Assessment of MULTALL as Computational Fluid Dynamics Code for the Analysis of Tube-Axial Fans
(The American Society of Mechanical Engineers (ASME), 2021)This work deals with the application of the open-source computational fluid dynamics (CFD) code MULTALL to the analysis of tube-axial fans. The code has been widely validated in the literature for high-speed turbomachine ... -
An Additively Manufactured Four-Sensor Fast Response Aerodynamic Probe
(The American Society of Mechanical Engineers (ASME), 2021)This study describes the design, development, and testing of a miniature fast response aerodynamic probe (FRAP) with four sensors (4S), which are able to perform measurements in the unsteady three-dimensional flow field. ... -
Impact of Additive Manufacturing on Internal Cooling Channels With Varying Diameters and Build Directions
(The American Society of Mechanical Engineers (ASME), 2021)The use of additive manufacturing (AM) processes, such as direct metal laser sintering, provides the design freedom required to incorporate complex cooling schemes in gas turbine components. Additively manufactured turbine ... -
Investigation of a Rotor Blade With Tip Cooling Subject to a Nonuniform Temperature Profile
(The American Society of Mechanical Engineers (ASME), 2021)One of the challenges in the design of a high-pressure turbine blade is that a considerable amount of cooling is required so that the blade can survive high temperature levels during engine operation. Another challenge is ... -
Flow Distortion Into the Core Engine for an Installed Variable Pitch Fan in Reverse Thrust Mode
(The American Society of Mechanical Engineers (ASME), 2021)The flow distortion at core engine entry for a variable pitch fan (VPF) in reverse thrust mode is described from a realistic flow field obtained using an integrated airframe-engine model. The model includes the VPF, core ... -
Effects of Cooling Configurations on the Aerothermal Performance of a Turbine Endwall With Jet Impingement and Film Cooling
(The American Society of Mechanical Engineers (ASME), 2021)With the increase of turbine inlet temperature and the application of premixed combustion, turbine components, particularly the turbine endwall, work in a harsh environment and must be effectively cooled to ensure the ... -
Upstream Film Cooling on the Contoured Endwall of a Transonic Turbine Vane in an Annular Cascade
(The American Society of Mechanical Engineers (ASME), 2021)The effects of mainstream flow velocity, density ratio (DR), and coolant-to-mainstream mass flow ratio (MFR) on a vane endwall in a transonic, annular cascade were investigated. A blow down facility consisting of five vanes ... -
Effects of Jet Impingement on Convective Heat Transfer in Effusion Holes
(The American Society of Mechanical Engineers (ASME), 2021)A common design for cooling the combustor liner of gas turbines is a double wall composed of impingement jets that feed effusion cooling holes. An important cooling mechanism associated with the effusion hole is the ... -
Experimental Heat Transfer and Boundary Layer Measurements on a Ceramic Matrix Composite Surface
(The American Society of Mechanical Engineers (ASME), 2021)Ceramic matrix composites (CMCs) are quickly becoming more prevalent in the design of gas turbines due to their advantageous weight and thermal properties. While there are many advantages, the CMC surface morphology differs ... -
Heat Transfer in Rotating, Trailing Edge, Converging Channels With Partial Length Pin-Fins
(The American Society of Mechanical Engineers (ASME), 2021)In the current study, the heat transfer and pressure drop characteristics of a rotating, partial pin-finned, cooling channel that has a trapezoidal cross section and converges from the hub to tip in both the streamwise and ... -
Flow Physics During Surge and Recovery of a Multi-Stage High-Speed Compressor
(The American Society of Mechanical Engineers (ASME), 2021)Stall followed by surge in a high-speed compressor can lead to violent disruption of the flow, damage to the blade structures and eventually engine shutdown. Knowledge of unsteady blade loading during surge is crucial for ... -
Modeling of Axial Compressor With Large Tip Clearances
(The American Society of Mechanical Engineers (ASME), 2021)In the drive for lower fuel consumption through increased bypass ratio and increased overall pressure ratio (OPR), engine designs for the next generation of single-aisle aircraft will require core sizes below 3 lb/s and ... -
Pulsed Suction Control in a Highly Loaded Compressor Cascade With Low Suction Flowrates
(The American Society of Mechanical Engineers (ASME), 2021)The influence of pulsed suction (PS) on flow separation and aerodynamic performance in a highly loaded compressor cascade is experimentally studied herein. The excitation frequency is investigated as it determines the ...