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RISA Robust Procedure to Implement Dynamic Stall Models Into Actuator Line Methods for the Simulation of Vertical-Axis Wind Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The actuator line method (ALM), combining a lumped-parameter representation of the rotating blades with the computational fluid dynamics (CFD) resolution of the turbine flow field, stands out among the modern simulation ...
Blade Design Criteria to Compensate the Flow Curvature Effects in H Darrieus Wind Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Darrieus wind turbines are experiencing a renewed interest in the wind energy scenario, in particular, whenever small and mediumsize installations are considered. In these contexts, the average wind speeds are generally ...
Aerodynamics of Darrieus Wind Turbines Airfoils: The Impact of Pitching Moment
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Recent studies have demonstrated that, when rotating around an axis orthogonal to the flow direction, airfoils are virtually transformed into equivalent airfoils with a camber line defined by their arc of rotation. In these ...
A Parametric Computational Fluid Dynamics Analysis of the Valve Pocket Losses in Reciprocating Compressors
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The reduction of pressure losses is one of the most important challenges for the efficiency increase of a reciprocating compressor. Since the absorbed power is strongly affected by the losses through pocket valves and ...
Assessment of a Computationally Efficient Method for Industrial Simulations of Transient Heat Transfer During Autoclave Curing
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: A numerical approach for transient computational fluid dynamics analyses of the autoclave curing process is presented, aimed at finding a trade-off between accuracy and computational cost that can make it industry-affordable. ...
Analysis of the Flow-Field Distortions Induced by Pneumatic Pressure Probes in Test Bench Experiments on Centrifugal Compressors: Are We Testing Right?
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Experimental testing at the test rig still plays a key role in the development of new centrifugal compressor designs for industrial applications. Although a wide set of different probes is used as per common practice, the ...
Selection Criteria for Rotor Number and Rotational Direction in Arrays of Closely Spaced Darrieus Turbines
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The efficiency gains observed in a pair of closely spaced Darrieus turbines suggest the deployment of multiple turbines as an appealing solution for wind and, particularly, hydrokinetic applications, where the inflow ...
Detailed Analysis of the Wake Structure of a Straight-Blade H-Darrieus Wind Turbine by Means of Wind Tunnel Experiments and Computational Fluid Dynamics Simulations
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: Darrieus vertical axis wind turbines (VAWTs) have been recently identified as the most promising solution for new types of applications, such as small-scale installations in complex terrains or offshore large floating ...
An Investigation on the Loss Generation Mechanisms Inside Different Centrifugal Compressor Volutes for Turbochargers
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: In centrifugal compressor design, the volute plays a key role in defining the overall efficiency and operating range of the stage. The flow at the impeller outlet is indeed characterized by a high kinetic energy content, ...
A Critical Analysis on Low-Order Simulation Models for Darrieus Vawts: How Much Do They Pertain to the Real Flow?
Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: To improve the efficiency of Darrieus wind turbines, which still lacks from that of horizontal-axis rotors, computational fluid dynamics (CFD) techniques are now extensively applied, since they only provide a detailed and ...