Results 111 to 120 of about 14,096,044 (237)

Effect of passive flow control on the aerodynamic performance, entropy generation and aeroacoustic noise of axial turbines for wave energy extractor

Ocean Engineering, 2018
Wells turbine is the simplest type of an axial flow self-rectifying air turbine that can be used in conjunction with Oscillating Water Column (OWC) system in the extraction of ocean wave energy. It has been noticed that this turbine is subjected to early
Ahmed S. Shehata, Xiao Qing, M. Kotb, M. Selim, A. Elbatran, Day Alexander   +5 more
semanticscholar   +1 more source

The Role of Ultra‐Thin Passive Films and Organic Adsorbates on Aluminum Chips for a Friction‐Induced Solid‐State Recycling Process

Advanced Engineering Materials, EarlyView.
Despite benefits to storage stability and handleability of aluminum scrap, octadecyl phosphonic acid (ODPA) SAMs reduce the tensile strength of wires produced using friction‐induced recycling. Etching and methyl diphosphonic acid (MDPA) coatings, however, have little effect.
Timothy D. Goller, Steffen Gabsa, Werner Homberg, Guido Grundmeier   +3 more
wiley   +1 more source

Numerical Investigation on the three-Dimensional Flowfield in the Single Expansion Ramp Nozzle with Passive Cavity Flow Control

Journal of Applied Fluid Mechanics, 2019
Single Expansion Ramp Nozzle (SERN) with large expansion ratio is normally adopted for the hypersonic aircraft in consideration of integrated aircraft / propulsion system / nozzle design.
L. Zhou, Z. Wang
doaj  

Model-Free Closed-Loop Control of Flow Past a Bluff Body: Methods, Applications, and Emerging Trends

Actuators
Flow past one or multiple bluff bodies is almost ubiquitous in nature and industrial applications, and its rich underlying physics has made it one of the most typical problems in fluid mechanics and related disciplines.
Feng Ren, Xin Wen, Hui Tang
doaj   +1 more source

Passive flow rate control of the fuel and the oxidizer in liquid fuelled rocket motors

, 2005
For passive flow rate control of oxidizer and fuel of a liquid propellant engine a cavitating venturi is designed, produced and ...
Orhan, FE, Ak, MA, Yazici, B, Gunduz, DE, Gonc, LO, Sumer, B, Puskulcu, G, Yildirim, C   +7 more
core   +1 more source

Elastic–Plastic Modeling and Experimental Characterization of Granular Jamming Actuators

Advanced Engineering Materials, EarlyView.
Granular jamming enables rapid switching between soft and rigid mechanical states. Here, a reduced‐order elastic‐perfectly‐plastic beam framework captures pressure‐dependent loading, unloading, residual deformation, and hysteresis in jammed beams, while matching three‐point bending experiments across materials and geometries. The framework links design
Saheli Patel, Prashant K. Purohit, Jordan R. Raney   +2 more
wiley   +1 more source

Passive laminar flow control of crossflow vorticity [PDF]

, 1990
A passive laminar flow crossflow vorticity control system includes an aerodynamic or hydrodynamic surface having geometric perturbations. The perturbations include peaks and valleys having a predetermined spacing and aligned approximately in a streamline
Holmes, Bruce J.
core  

Rotary 3D Printing With Integrated Electroplating

Advanced Engineering Materials, EarlyView.
A rotary material extrusion platform integrates localized copper electroplating with printing and encapsulation to fabricate cylindrical polymer–metal structures containing fully embedded, low‐resistance conductive pathways that enable internal Joule heating and thermally activated shape‐memory responses.
Antonio Zagaria, Nicola Larovere, Moslem Mohammadi, Gianluca Percoco, Ali Zolfagharian, Gianni Stano   +5 more
wiley   +1 more source

Passive control of sonic flow from converging nozzle with D-shaped rib

Results in Engineering
The abrupt expansion at the blunt base of projectiles, rockets, missiles, etc., is a common phenomenon. Flow separation and reattachment are caused by the abrupt increase in the base area, and the pressure in the separated recirculation area is lower ...
Mayur Bharatbhai Makwana, Sayed Ahmed Imran Bellary, Sher Afghan Khan, Abdul Aabid, Muneer Baig   +4 more
doaj   +1 more source

Five Megawatt Wind Turbine Power Output Improvements by Passive Flow Control Devices

, 2017
The effects of two types of flow control devices, vortex generators (VGs) and Gurney flaps (GFs), on the power output performance of a multi-megawatt horizontal axis wind turbine is presented.
U. Fernández-Gámiz, E. Zulueta, Ana Boyano, Igor Ansoategui, Irantzu Uriarte   +4 more
semanticscholar   +1 more source