Results 211 to 220 of about 20,614 (263)

Control of Base Flows with Micro Jets

International Journal of Turbo and Jet Engines, 2011
Abstract. This paper presents the results of an experimen-tal investigation carried out to control the base pressure ina suddenly expanded axi-symmetric passage. Active con-trol in the form of micro jets was employed to control thebase pressure. Air injection at four locations at the base,symmetric to the nozzle axis was used as the active con-trol ...
Maughal Ahmed Ali Baig, Fahad Al-Mufadi, Sher Afghan Khan, Ethirajan Rathakrishnan   +3 more
openaire   +1 more source

Progress on micro-jetting forming

International Technology and Innovation Conference 2006 (ITIC 2006), 2006
With the precise controlling capability of the shapes, velocity and drop locations of micro-droplets, micro-jetting forming technology is an attractive method for patterning and fabricating objects directly from design or image files without the need for masks, patterns, or dies, and it is a popular research subject in Advanced Manufacturing Technology.
null Li Xiaoyan, null Zhang Shu
openaire   +1 more source

Piezoelectric micro-jet devices: A review

Sensors and Actuators A: Physical, 2019
Abstract Piezoelectric micro-jet devices (PMJDs), also known as piezoelectric inkjet printing, are used to distribute the functional materials to form single or complex microstructures on a substrate. As one of the most promising technologies in the field of additive manufacturing in the 21st century, the PMJDs have received a lot of attentions from ...
Hengyu Li, Junkao Liu, Kai Li, Yingxiang Liu   +3 more
openaire   +1 more source

Steel Welding with Micro-Jet Injector

Advanced Materials Research, 2014
The article focuses on mild steel welding and covers the new possibilities of that method. Since 2011 innovate welding technology based on micro-jet cooling just after welding is being checked. Weld metal deposit (WMD) was carried out for standard MIG welding and for new welding method with micro-jet cooling. A very high percentage of acicular ferrite (
Tomasz Węgrzyn, Jan Piwnik, Izabela Horzela, Wojciech Majewski   +3 more
openaire   +1 more source

Micro-jet Printing of Refractive Microlenses

Diffractive Optics and Micro-Optics, 1998
The technology for fabricating micro-optical elements for low cost optical interconnects by micro-jet (ink-jet) printing has been under development for over two years [1,2]. This data-driven method of micro-optics fabrication offers the benefits of low cost, flexibility and in-situ, non-contact processing.
W. Royall Cox, Ting Chen, Chi Guan, Donald J. Hayes, Rick E. Hoenigman, Brian T. Teipen, Duncan L. MacFarlane   +6 more
openaire   +1 more source

Micro-jet plasma CVD with HMDSO/O2

Surface and Coatings Technology, 2005
Abstract Micro-jet plasma chemical vapor deposition can produce quartz-like localized coatings from HMDSO/O 2 (hexamethyldisiloxane) mixture with an extremely high deposition rate (120 μm/s). The reaction between HMDSO and O 2 takes place in the jet. Less than 0.5 ms is required to remove the methyl groups from the monomer and to oxidize Si.
K. Silmy, A. Holländer, A. Dillmann, J. Thömel   +3 more
openaire   +1 more source

Control of Suddenly Expanded Flows with Micro-Jets

International Journal of Turbo and Jet Engines, 2003
The results of an experimental investigation carried out to control the base pressure in a suddenly expanded axi-symmetric passage are presented in this paper. Active control in the form of micro-jets was employed to control the base pressure. Air injection at four locations at the base, symmetric to the nozzle axis was used as the active control ...
Sher Afghan Khan, E. Rathakrishnan
openaire   +1 more source

Micro-jets in confined turbulent cross flow

Experimental Thermal and Fluid Science, 2006
The mixing of sub-millimetre diameter jets issuing into a turbulent cross flow is examined with a combination of laser diagnostic techniques. The cross flow stream is in a confined duct and the micro-jet issue from the sides of injector vanes. A range of cross jet momentum ratios, cross flow temperatures and turbulence intensities are investigated to ...
J.B. Kelman, D.A. Greenhalgh, M. Whiteman   +2 more
openaire   +1 more source

Micro-jet printing of polymers for electronics manufacturing

Proceedings of 3rd International Conference on Adhesive Joining and Coating Technology in Electronics Manufacturing 1998 (Cat. No.98EX180), 2002
Ink-jet/micro-jet printing methods are being developed for direct writing of a variety of materials for electronics and optoelectronics manufacturing. Advantages offered by this approach for micro-element fabrication and adhesive joining include precise volumetric control of dispensed material, data-driven flexibility, low cost, high speed and low ...
D.J. Hayes, W.R. Cox
openaire   +1 more source

Micro-Jet Arrays for Cooling of Electronic Equipment

ASME 3rd International Conference on Microchannels and Minichannels, Part B cont’d, 2005
A high heat flux cooling system using an array of micro-jets is presented. The Micro-Jet Cooling Array (MJCA) is based on an array of small diameter micro-jets, with jet diameters as low as 300 microns. The return flow in MJCA is arranged so that the effect of neighboring jets is essentially eliminated and the high heat fluxes achievable in a single ...
Matthew R. Overholt, Andrew McCandless, Kevin W. Kelly, Charles J. Becnel, Shariar Motakef   +4 more
openaire   +1 more source