Results 81 to 90 of about 39,732 (296)

Ceiling Effect on the Aerodynamic Characteristics of Multi-Rotor Systems and Its Modeling

IEEE Access
The ceiling effect, a phenomenon in which rotor thrust increases near a ceiling wall, holds significant potential for applications in energy-efficient drones and aerial manipulation.
Kazuki Tokunaga, Hiroaki Nakanishi
doaj   +1 more source

Measurement of airfoil heat transfer coefficients on a turbine stage [PDF]

A turbulence generating grid was designed and installed in the turbine inlet which produced the target nominal value of 10 percent free stream turbulence.
Blair, Michael F., Dring, Robert P., Joslyn, H. David   +2 more
core   +1 more source

Rational Tuning of Hygroscopic Oscillation of Stacked Nanoflake Assemblies for Continuous Ambient Energy Harvesting

Advanced Materials, EarlyView.
Stacked nanoflake assembly (SNA) membranes can oscillate autonomously, offering opportunities for soft actuation and energy harvesting. This work uncovers the physical mechanism behind the sustained oscillation of SNA membranes in gradient humidity and identifies three governing dimensionless parameters, enabling rational design for optimizing SNA ...
Zijing Zhang, Jimin Fu, Gesa Zhang, Zhihua Liang, Boxun Zhang, Haimin Yao   +5 more
wiley   +1 more source

Noise of a model counterrotation propeller with reduced aft rotor diameter at simulated takeoff/approach conditions (F7/A3) [PDF]

A model high-speed advanced counterrotation propeller, F7/A3, was tested in the NASA Lewis Research Center 9 by 15 foot Anechoic Wind Tunnel at simulated takeoff/approach conditions of 0.2 Mach number.
Gordon, Eliott B., Woodward, Richard P.
core   +1 more source

Simulating wind turbine interactions using the vorticity transport equations [PDF]

, 2009
The aerodynamic interactions that can occur within a wind farm result in the constituent turbines generating a lower power output than would be possible if each of the turbines were operated in isolation.
Brown, R.E., Fletcher, Timothy M.
core  

Anderson transition in a three dimensional kicked rotor

, 2008
We investigate Anderson localization in a three dimensional (3d) kicked rotor. By a finite size scaling analysis we have identified a mobility edge for a certain value of the kicking strength $k = k_c$. For $k > k_c$ dynamical localization does not occur,
Antonio M. García-García, B. L. Altshuler, B. V. Chirikov, D. Knuth, G. Casati, J. Bourgain, Jiao Wang, M. L. Mehta   +7 more
core   +1 more source

Pathological Behavior in the Spectral Statistics of the Asymmetric Rotor Model [PDF]

, 2001
The aim of this work is to study the spectral statistics of the asymmetric rotor model (triaxial rigid rotator). The asymmetric top is classically integrable and, according to the Berry-Tabor theory, its spectral statistics should be Poissonian ...
A. Pandey, A. Pandey, A.B. Migdal, A.R.P. Rau, F. Sakata, H. Goldstein, J. Reichl, J.M. Eisenberg, L. Salasnich, M. Berry, M. Tabor, M.V. Berry, M.V. Berry, S. Drozdz, S. Drozdz, V. R. Manfredi, V.P. Maslov, V.R. Manfredi, V.R. Manfredi   +18 more
core   +3 more sources

Impact of PVDF Homo and Copolymer on Thiophosphate Solid Electrolyte Characteristics and Comprehensive Bulk‐To‐Surface Characterization

Advanced Materials Interfaces, EarlyView.
This study examines how a PVDF‐like binder affects the argyrodite Li6PS5Cl electrolyte properties. Using an approach that combines bulk and surface characterization with electrochemistry, we found a chemical interaction between Li6PS5Cl and PVDF, resulting in partial chlorine substitution by fluorine and slightly reduced ionic conductivity.
Lucas Trassart, Lauréline Marchal, Anthony Bonnet, François Fauth, Fannie Alloin, Claire Villevieille   +5 more
wiley   +1 more source

Flow visualization using momentum and energy transport tubes and applications to turbulent flow in wind farms

, 2012
As a generalization of the mass-flux based classical stream-tube, the concept of momentum and energy transport tubes is discussed as a flow visualization tool.
Meneveau, Charles, Meyers, Johan
core   +1 more source

Transducers Across Scales and Frequencies: A System‐Level Framework for Multiphysics Integration and Co‐Design

Advanced Materials Technologies, EarlyView.
Transducers convert physical signals into electrical and optical representations, yet each mechanism is bounded by intrinsic trade‐offs across bandwidth, sensitivity, speed, and energy. This review maps transduction mechanisms across physical scale and frequency, showing how heterogeneous integration and multiphysics co‐design transform isolated ...
Aolei Xu, Mengyao Xiao, Zhouli Sui, Yinpeng Wang, Daoye Zheng, Yuxin Liu, Luwei Wang, Huajun Liu, Chengkuo Lee   +8 more
wiley   +1 more source