Results 41 to 50 of about 35,990 (188)
Non-Empirical BEM Corrections Relating to Angular and Axial Momentum Conservation
Energies, 2019 The Blade-Element Momentum (BEM) model for Horizontal-Axis Wind Turbines (HAWTs), although extremely useful, is known to be approximate due to model formulation insufficiencies, for which add-ons and corrections have been formulated over the past many ...
Søren Hjort
doaj +1 more source
Non‐uniform velocity distribution effect on the Betz–Joukowsky limit
Wind Energy, 2012 ABSTRACTA simple analytic correction is derived for the maximum efficiency of an ideal wind turbine rotor, the Betz–Joukowsky limit. The analytic correction accounts for the effect that the non‐uniform atmospheric boundary layer velocity distribution has on the Betz–Joukowsky derivation.
Leonardo P. Chamorro, R.E. A Arndt
openaire +1 more source
Superadiabatic transitions in quantum molecular dynamics [PDF]
, 2009 We study the dynamics of a molecule’s nuclear wave function near an avoided crossing of two electronic energy levels for one nuclear degree of freedom.
Betz V. +9 more
core +3 more sources
A Multi-Element Diffuser Augmented Wind Turbine
Energies, 2014 A new class of diffuser augmented wind turbines (DAWTs) is presented. The new diffuser concept exploits aero-dynamic principles for the creation of high-lift airfoil configurations known from the aircraft industry.
Søren Hjort, Helgi Larsen
doaj +1 more source
Refined Betz limit for rotors with a finite number of blades
Wind Energy, 2008 AbstractThe criterion of Betz for optimum rotors with a finite number of blades is revisited and used to determine the performance of wind turbines. The Betz criterion states that ideal efficiency is obtained when the distribution of circulation along the blade produces a rigidly helicoid wake that moves in the direction of its axis with a constant ...
Valery L. Okulov, Jens N. Sørensen
openaire +1 more source
Benchmarking of a software stack for autonomous racing against a professional human race driver
, 2020 The way to full autonomy of public road vehicles requires the step-by-step replacement of the human driver, with the ultimate goal of replacing the driver completely.
Betz, Johannes +2 more
core +1 more source
Detection of interstellar H_2D^+ emission [PDF]
, 1999 We report the detection of the 1_{10}-1_{11} ground state transition of ortho-H_2D^+ at 372.421 GHz in emission from the young stellar object NGC 1333 IRAS 4A.
Bogey M. +10 more
core +2 more sources
Experimental Factors and Techniques for Pool Boiling Heat Transfer Enhancement: A Critical Review
Heat Transfer, EarlyView.ABSTRACT This review presents a comprehensive assessment of active strategies for enhancing pool boiling heat transfer, with a focus on techniques that do not rely solely on the boiling surface modification. It examines a broad range of methodologies including fluid additives, external fields, mechanical interventions, and thermal‐geometric tuning that
José E. Pereira +2 more
wiley +1 more source
Nordic Journal of Botany, EarlyView.Many habitat‐specialist plant species have been endangered by fragmentation or destruction of their habitats. Minuartia smejkalii is a serpentinophyte endemic to the Czech Republic. It is highly threatened by recent habitat destruction and fragmentation, calling for effective conservation measures.
Alrun Siebenkäs +3 more
wiley +1 more source
Two-point density correlations of quasicondensates in free expansion [PDF]
, 2010 We measure the two-point density correlation function of freely expanding quasicondensates in the weakly interacting quasi-one-dimensional (1D) regime.
Betz, T. +10 more
core +2 more sources