Desorption of a component from a gas mixture being injected through a submerged nozzle, during the bubble formation stage, is tlieoretically studied. The solute is assumed to suffer an instantaneous reaction on the liquid side, the reaction plane being on the liquid/gas interface. The volume elements on the gas bubble are assumed to result from a forced surface renewal coupled with a natural su...

Laser cladding technology is used for coating deposition, worn surfaces repairing, and direct fabrication. However, the technological complexity high cost prevents its wide industrial applications. In present work, gas-powder flux parameters are studding to optimize conditions choice of appropriate nozzle. Using commercial Precitec (Germany) nozzles, relations between nozzle geometry powder ana...

Adige S.p.A. is a world leader company in projecting, producing and selling lasertube cutting systems. Two different systems are available, one based on fusion and the other on oxidation of the material that has to be cut. Both these techniques require the presence of a laser beam well focalised on the material and an assistance gas stream, used to eject the melted material. Until now paths for...

We describe the construction of an apparatus for the production of a molecular jet of microhydrated biomolecules. Our design uses a water reservoir producing water vapour, which then passes through a separate reservoir containing a vapour of a sublimated biomolecule. The mixture coexpands into a molecular beam apparatus through a conical nozzle. Mass spectra showing water-adenin and water-uraci...

During the production of fine metal powder using vacuum induction melting gas atomization (VIGA) technology, problem nozzle clogging is often encountered. The viscosity melt one key factors causing nozzle. To visualize mechanism nozzle, volume fluid (VOF) model combined with large eddy turbulence was used to simulate nozzle-clogging process an alloy in primary zone. results show that, increase ...

Mass flow scaling of gas-assisted coaxial atomizers from laboratory to industrial scale is major interest for a wide field applications. However, there only scarce knowledge and research concerning the effect atomizer scale-up on liquid breakup spray characteristics. The main objective this study therefore derive basic principles jet using upscaled nozzles increase mass rate [Formula: see text]...

A numerical simulation of the gas-dynamic processes in thrust vectorable nozzle solid rocket motor is considered. Construction a geometric model and generation computational mesh, reconstruction mesh at each time step are discussed. Calculations flowfield combustion products pre-nozzle chamber block carried out for various angles rotation. The distributions gas dynamic quantities volume corresp...

A fluidized bed reactor that is operating in the bubbling regime has been developed for the conversion of bio-oils to syngas.The reactor consists of a 7.6 cm I.D. (or internal diameter) bed, with an expanded freeboard. The volume of the reactor can be adjusted to vary the gas residence time. This reactor has been used to carry out either thermal or catalytic cracking for reforming bio-oils.A ga...