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RISDifferential Equation-Based Specification of Turbulence Integral Length Scales for Cavity Flows
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A new modeling approach has been developed that explicitly accounts for expected turbulent eddy length scales in cavity zones. It uses a hybrid approach with Poisson and Hamilton–Jacobi differential equations. These are ...
Enhanced Delayed Detached Eddy Simulation for Cavities and Labyrinth Seals
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A range of popular hybrid Reynolds-averaged Navier–Stokes -large eddy simulation (RANS-LES) methods are tested for a cavity and two labyrinth seal geometries using an in-house high-order computational fluid dynamics (CFD) ...
New Approach for Analyzing Solar Collectors Subjected to Unequal Front/Rear Ambient Temperatures: The Equivalent Ambient Temperature Concept, Part 2: Validation and Implications for Design
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: An approach based on a new conceptual temperature termed the “equivalent ambient temperature” has been introduced for analyzing solar collector thermal performances when the environments to the ...
New Approach for Analyzing Solar Collectors Subjected to Unequal Front/Rear Ambient Temperatures: The Equivalent Ambient Temperature Concept, Part 1: Modeling
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Standard analyses of solar collector thermal performance are based upon an energy balance in which the environments adjoining the front and rear of the collector are assumed to be at the same ...
Numerical Analysis of Guided Wave Transmission Through a Long Defect in a Rail Track
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Guided wave ultrasound has been used to continuously monitor welded rail track by transmitting guided wave ultrasound between alternate transmit and receive stations along the rail. A section of rail was encountered where ...
A User-Focused Approach to Evaluating Probabilistic and Categorical Forecasts
Publisher: American Meteorological Society
Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part II: Droplet Behavior in the Chamber
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Within aeroengines, bearing chambers exhibit a highly complex two-phase environment as a result of the complex air/oil interactions. The desire to operate at both higher temperatures and shaft speeds requires a sufficient ...
Natural Convection Heat Transfer in a Partially Open Square Cavity With a Thin Fin Attached to the Hot Wall
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A computational study of steady, laminar, natural convective fluid flow in a partially open square enclosure with a highly conductive thin fin of arbitrary length attached to the hot wall at ...
Toward Investigation of External Oil Flow From a Journal Bearing in an Epicyclic Gearbox
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: High loads and bearing life requirements make journal bearings the preferred choice for use in high-power, planetary gearboxes in jet engines. With the planet gears rotating about their own axis and orbiting around the sun ...
Simulation of a Simplified Aeroengine Bearing Chamber Using a Fully Coupled Two-Way Eulerian Thin Film/Discrete Phase Approach Part I: Film Behavior Near the Bearing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Previous work at the Gas Turbine and Transmissions Research Center (G2TRC) has highlighted the need for an adequate computational model, which can appropriately model the oil shedding behavior from bearings. Oil can break ...