Results 111 to 120 of about 351,466 (302)

Experimental study of oscillating SD8020 foil for propulsion [PDF]

, 2007
The thrust producing performance and efficiency of an SD8020 oscillating foil with a symmetrical saw-tooth angle of attack pitching profile was studied through force and torque measurements, as well as dye flow visualization, in the water tunnel at low ...
Chai, W. S., Srigrarom, S., Tan, H. T.
core   +1 more source

A Tracer Diffusion Study of Diverse Photo‐Ionic Phenomena in Strontium Titanate

Advanced Functional Materials, EarlyView.
Two strong interfacial photo‐ionic effects are demonstrated for the model system SrTiO3 through the application of isotope exchange experiments: UV illumination is found to enhance the oxygen surface exchange coefficient by several orders of magnitude and to depress the surface space‐charge potential substantially.
David M. Schwenkel, Timon F. Kielgas, George F. Harrington, Roger A. De Souza   +3 more
wiley   +1 more source

Morphological Considerations of Fish Fin Shape on Thrust Generation

Journal of Applied Fluid Mechanics, 2014
In this study, we aimed to determine the relationship between thrust generation and fish fin shape. To compare the effect fin shape had on thrust generation, we categorized the morphological shapes of fish fins into equilateral polygonal shapes ...
Kenji Kikuchi, Yusuke Uehara, Yoshihiro Kubota, Mochizuki Osamu   +3 more
doaj  

Investigation of Stress Variation in Push-the-Bit Rotary Steering Bearings Under Weight on Bit and Push Forces

Cejing jishu
As the key component of the push-the-bit rotary steerable system, the accuracy and reliability of the bearing system directly affect the control accuracy and drilling efficiency of the drilling tool on the borehole trajectory.
SHEN Bin, YANG Hao, XUE Zhejing, LI Wei, CHENG Feng, LU Lu, WU Jie   +6 more
doaj   +1 more source

Effect of varying internal geometry on the static performance of rectangular thrust-reverser ports [PDF]

An investigation has been conducted to evaluate the effects of several geometric parameters on the internal performance of rectangular thrust-reverser ports for nonaxisymmetric nozzles. Internal geometry was varied with a test apparatus which simulated a
Mason, Mary L., Re, Richard J.
core   +1 more source

Laser‐Induced Microfabrication of Carbon Nanostructure: Processing Mechanism and Application for Next‐Generation Battery Technology

Advanced Functional Materials, EarlyView.
The article reviews laser‐processed carbons from various precursors, processing mechanism and their application in advanced batteries. The laser process is chemical free, fast, and scalable, enabling improved battery performance and stability for Li, Na, and Zn battery technologies.
Sujit Deshmukh, Shaista Nouseen, Martin Pumera   +2 more
wiley   +1 more source

Non-Keplerian orbits using low thrust, high ISP propulsion systems [PDF]

, 2009
The technology of high ISP propulsion systems with long lifetime and low thrust is improving, and opens up numerous possibilities for future missions.
Biggs, James, Bosquillon de Frescheville, Francois, Macdonald, Malcolm, McInnes, Colin, McKay, Robert, Vasile, Massimiliano   +5 more
core  

OCTOID: A Soft Robotic System Featuring Programmable Shape Morphing and Dynamic Structural Coloration

Advanced Functional Materials, EarlyView.
Inspired by octopuses, actuating legs based on soft materials are fabricated with programmed chiroptical properties and mechanical behaviors to achieve dynamic color modulation and reversible shape morphing, and these legs are developed into a modular OCTOID system.
Seung Hui Han, Seok‐In Lim, Ki‐Hyun Ryu, Sang Seok Lee, Dong‐Gue Kang, Jahyeon Koo, Kwang‐Un Jeong, Shin‐Hyun Kim, Dae‐Yoon Kim   +8 more
wiley   +1 more source

Analysis and Suppression of Thrust Ripple in a Permanent Magnet Linear Synchronous Motor—A Review

Energies
Nowadays, Permanent Magnet Synchronous Linear Motors (PMLSMs) are widely applied as direct drive mechanisms in the industrial manufacturing sector, which can fulfill the requirements for high precision and high production rates.
Siwen Chen, Yang Liu, Qian Zhang, Jiubin Tan   +3 more
doaj   +1 more source

Combination radial and thrust magnetic bearing [PDF]

, 2002
A combination radial and thrust magnetic bearing is disclosed that allows for both radial and thrust axes control of an associated shaft. The combination radial and thrust magnetic bearing comprises a rotor and a stator.
Blumenstock, Kenneth A.
core   +1 more source