|
|
|
|
|
Catharina Moreira, Nikolai Herzog and Christian Breitsamter
Recent developments in electrical Vertical Take-off and Landing (eVTOL) vehicles show the need for a better understanding of transient aero-mechanical propeller loads for non-axial inflow conditions. The variety of vehicle configurations conceptualized w...
ver más
|
|
|
|
|
|
|
|
|
|
|
Victor V. Kotlyar, Anton G. Nalimov and Alexey A. Kovalev
We consider sharp focusing of an axial superposition of two optical vortices with identical topological charges, but different amplitudes and circular polarizations of different signs. The ratio of the amplitudes of the two beams is a parameter. When thi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yinhui Zhong, Yinong Li and Jun Li
Due to the fact that the noise caused by axial fan blades of vehicles is large, which seriously affects ride comfort, and there is no effective mathematical model to quantitatively study the contribution of the various parameters of the blades to the noi...
ver más
|
|
|
|
|
|
|
|
|
|
|
Yonggang Cui, Wei Haur Lam, How Tion Puay, Muhammad S. I. Ibrahim, Desmond Robinson and Gerard Hamill
This study presents the decays of three components of velocity for a ship twin-propeller jet associated with turbulence intensities using the Acoustic Doppler Velocimetry (ADV) measurement and computational fluid dynamics (CFD) methods. Previous research...
ver más
|
|
|
|
|
|
|
|
|
|
|
Abdallah Samad, Gitsuzo B. S. Tagawa, François Morency and Christophe Volat
Calculating the unsteady convective heat transfer on helicopter blades is the first step in the prediction of ice accretion and the design of ice-protection systems. Simulations using Computational Fluid Dynamics (CFD) successfully model the complex aero...
ver más
|
|
|
|
|
|
|
|
|
|
|
Rodolfo Bontempo and Marcello Manna
The paper provides an evaluation of the errors embodied in the Axial Momentum Theory (AMT) as applied to a uniformly loaded actuator disk model without wake rotation. Although this model exhibits some unphysical features, such as the tip singularity and ...
ver más
|
|
|
|
|
|
|
|
|
|
|
Søren Hjort
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 de...
ver más
|
|
|
|
|
|
|
|
|
|
|
Rodolfo Bontempo and Marcello Manna
This paper investigates the impact of the standard approximations embodied in the well-known Momentum Theory on its performance prediction capabilities. To this aim, the results of the momentum theory, which is still widely used in all Blade Element/Mome...
ver más
|
|
|
|
|
|
|
|
|
|
|
Mantas Brazinskas, Stephen D. Prior and James P. Scanlan
The majority of research into full-sized helicopter overlapping propulsion systems involves co-axial setups (fully overlapped). Partially overlapping rotor setups (tandem, multirotor) have received less attention, and empirical data produced over the yea...
ver más
|
|
|
|
|
|
|
|
|
|
|
Chi-Jeng Bai, Wei-Cheng Wang, Po-Wei Chen and Wen-Tong Chong
In designing a horizontal-axis wind turbine (HAWT) blade, system integration between the blade design and the performance test of the generator is important. This study shows the aerodynamic design of a HAWT blade operating with an axial-flux permanent m...
ver más
|
|
|
|
|
|