Results 131 to 140 of about 31,919 (261)

Dynamic Modeling and Simulation of Morphing Wing Aircraft Considering Rigid‐Elastic Coupling Effects

International Journal of Mechanical System Dynamics, EarlyView.
ABSTRACT During the morphing process, the dynamic modeling of the morphing wing aircraft presents the characteristics of rigid‐elastic coupling effects, moving boundaries, and low computational efficiency. Meanwhile, parameters such as aerodynamic forces/moments, center of pressure, center of mass, and moment of inertia would also change significantly,
Xu Zha, Boran Qiao, Yingpeng Zhuo, Chengze Zhao, Yuchen Yang, Lixin Guan   +5 more
wiley   +1 more source

Aeroelastic modeling for the FIT team F/A-18 simulation [PDF]

Some details of the aeroelastic modeling of the F/A-18 aircraft done for the Functional Integration Technology (FIT) team's research in integrated dynamics modeling and how these are combined with the FIT team's integrated dynamics model are described ...
Wieseman, Carol D., Zeiler, Thomas A.
core   +1 more source

Determination of wind turbine far wake using actuator disk [PDF]

, 2014
The growth in size of wind turbines over the last years is significant. The rotor diameter becomes somehow comparable to atmospheric boundary layer at the land surface. In this case the assumption of uniform velocity of upcoming wind cannot be valid. The
AMER, Rodeyna, DOBREV, Ivan, MASSOUH, Fawaz   +2 more
core   +3 more sources

Turbulent snow transport and accumulation: New reduced‐order models and diagnostics

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Our new reduced‐order models of snow particle transport provide high‐fidelity calculations of snow accumulation in turbulent flows at significantly reduced computational costs. Additional accumulation diagnostics from the reduced‐order model predict complex patterns of particle concentration in turbulent boundary layers via coherent flow structures in ...
Nikolas O. Aksamit, Alex P. Encinas‐Bartos, Holt Hancock, Alexander Prokop   +3 more
wiley   +1 more source

Comparisons of several aerodynamic methods for application to dynamic loads analyses [PDF]

The results of a study are presented in which the applicability at subsonic speeds of several aerodynamic methods for predicting dynamic gust loads on aircraft, including active control systems, was examined and compared. These aerodynamic methods varied
Kroll, R. I., Miller, R. D.
core   +1 more source

Parameter investigation for urban surface‐energy balance: A large‐eddy simulation study

Quarterly Journal of the Royal Meteorological Society, EarlyView.
Large eddy simulation modelling is used to investigate the variation in surface‐energy balance (SEB) across an ensemble of morphometrically identical urban geometries. The geometries have the same plan‐area fraction, vegetated fraction, and frontal‐area index, but are unique in terms of building and green‐space layout.
Christopher E. Wilson, Jonathan K. P. Shonk, Sylvia I. Bohnenstengel, Athanasios Paschalis, Maarten van Reeuwijk   +4 more
wiley   +1 more source

Long‐Term Morphodynamic Responses to Flood Diversion in the Lower Kano River, Japan

River Research and Applications, EarlyView.
ABSTRACT Fluvial morphodynamics—the interaction between water flow, sediment transport, and channel morphology—is a central concern in sustainable river management. However, the long‐term effects of flood diversion remain underexplored. This study investigated the decadal‐scale morphodynamic responses of the lower Kano River in Japan following the ...
Yuta Itsumi, Takeyoshi Chibana, Daisuke Harada, Menglu Qin, Satoshi Watanabe   +4 more
wiley   +1 more source

Simulation of Nonpremixed Jet Flame Using Flamelet‐Generated Manifold

Safety Science and Technology, EarlyView.
A flamelet‐generated manifold (FGM) approach is proposed and validated by nonpremixed methane jet flames. The effects of radiation and buoyancy were critically examined, and nonpremixed and premixed tabulation methods were compared, revealing the importance of radiation, buoyancy, and appropriate flamelet prototype in accurate FGM modeling.
Yujie Lin, Weijie Zhang, Zhi Zhang, Ziqi Wang, Peng Cai, Yi Liu, Anfeng Yu   +6 more
wiley   +1 more source

Comparison of Unsteady Low- and Mid-Fidelity Propeller Aerodynamic Methods for Whirl Flutter Applications

Applied Sciences
Aircraft configurations with propellers have been drawing more attention in recent times, partly due to new propulsion concepts based on hydrogen fuel cells and electric motors.
Christopher Koch, Nils Böhnisch, Hendrik Verdonck, Oliver Hach, Carsten Braun   +4 more
doaj   +1 more source

Determining Diffusion Coefficients in Polymer Electrolyte Membranes With Lab Based Micro X‐Ray Fluorescence Analysis: A Proof of Concept

X-Ray Spectrometry, EarlyView.
ABSTRACT The diffusion of metal ions in polymer electrolyte membranes is an important parameter for aging and capacity loss in electrochemical cells. Here, the diffusion coefficients of vanadium ions in Nafion membranes are studied. These are important to describe transportation of the ions through the membrane separator in vanadium redox flow ...
Frithjof Mähler, Sven Hampel, Ursula E. A. Fittschen   +2 more
wiley   +1 more source