Results 61 to 70 of about 221,361 (152)

Computer program documentation for a subcritical wing design code using higher order far-field drag minimization [PDF]

open access: yes
A subsonic, linearized aerodynamic theory, wing design program for one or two planforms was developed which uses a vortex lattice near field model and a higher order panel method in the far field.
Kuhlman, J. M., Shu, J. Y.
core   +1 more source

Development and validation of an advanced low-order panel method [PDF]

open access: yes
A low-order potential-flow panel code, PMARC, for modeling complex three-dimensional geometries, is currently being developed at NASA Ames Research Center. The PMARC code was derived from a code named VSAERO that was developed for Ames Research Center by
Ashby, Dale L.   +2 more
core   +1 more source

Wind Farm Power Production Assessment: Introduction of a New Actuator Disc Method and Comparison with Existing Models in the Context of a Case Study

open access: yesApplied Sciences, 2019
The aim of the present study is to perform a comparative analysis of two actuator disc methods (ACD) and two analytical wake models for wind farm power production assessment.
Nikolaos Simisiroglou   +2 more
doaj   +1 more source

The UTRC wind energy conversion system performance analysis for horizontal axis wind turbines (WECSPER) [PDF]

open access: yes, 1981
The theory for the UTRC Energy Conversion System Performance Analysis (WECSPER) for the prediction of horizontal axis wind turbine performance is presented.
Egolf, T. A., Landgrebe, A. J.
core   +1 more source

Corrugated structure insertion for extending the SASE bandwidth up to 3% at the European XFEL

open access: yes, 2016
The usage of x-ray free electron laser (XFEL) in femtosecond nanocrystallography involves sequential illumination of many small crystals of arbitrary orientation.
Feng, G., Limberg, T., Zagorodnov, I.
core   +1 more source

Calculation of the longitudinal aerodynamic characteristics of wing-flap configurations with externally blown flaps [PDF]

open access: yes
An analytical method for predicting the longitudinal aerodynamic characteristics of externally blown flap configurations is described. Two potential flow models make up the prediction method: a wing and flap lifting-surface model and a turbofan engine ...
Mendenhall, M. R.
core   +1 more source

Stability of nonlinear one-dimensional laser pulse solitons in a plasma

open access: yes, 2007
In a recent one-dimensional numerical fluid simulation study [Saxena et al., Phys. Plasmas 13,032309 (2006)], it was found that an instability is associated with a special class of one-dimensional nonlinear solutions for modulated light pulses coupled to
Abhijit Sen   +8 more
core   +1 more source

Investigation of Turbulence Intensity Effects on Tidal Turbine Wakes Through the BEM–CFD Method

open access: yesJournal of Marine Science and Engineering
The wake characteristics of tidal turbines are significantly influenced by turbulence intensity (TI) and flow velocity in the marine environment. This study employs the Blade Element Momentum (BEM)–CFD method to model two-bladed horizontal tidal turbine ...
Erhu Hou   +5 more
doaj   +1 more source

The effect of blade aerodynamic modelling on the prediction of high-frequency rotor airloads [PDF]

open access: yes, 2009
Interactions between the blades and vortical structures within the wake of a helicopter rotor are a significant source of impulsive loading and noise, particularly in descending flight.
Brown, Richard, Kelly, Mary E.
core  

Dynamic density functional study of a driven colloidal particle in polymer solutions

open access: yes, 2003
The Dynamic Density Functional (DDF) theory and standard Brownian dynamics simulations (BDS) are used to study the drifting effects of a colloidal particle in a polymer solution, both for ideal and interacting polymers.
A. Lang   +19 more
core   +1 more source

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