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JOURNALS // Prikladnaya Mekhanika i Tekhnicheskaya Fizika // Archive

Prikl. Mekh. Tekh. Fiz., 2012 Volume 53, Issue 2, Pages 72–83 (Mi pmtf1346)

This article is cited in 3 papers

Effect of gas flow swirling on coating deposition by the cold gas-dynamic spray method

S. P. Kiselev, V. P. Kiselev, V. N. Zaikovskii

Khristianovich Institute of Theoretical and Applied Mechanics, Siberian Branch, Russian Academy of Sciences, Novosibirsk, 630090, Russia

Abstract: The effect of gas flow swirling on the process of coating deposition onto a target by the cold gas-dynamic spray method is studied experimentally and numerically. Flow swirling is found to change the gas flow field and to reduce the gas flow rate under typical conditions of cold gas-dynamic spray. In a non-swirled flow, the shape of the deposited spot is similar to a sharp cone. In contrast, the deposited spot in a swirled flow is shaped as a crater without particles at the center of this crater. It is found that this effect is caused by centrifugal forces acting on particles in a swirled gas flow.

Keywords: cold gas-dynamic spray, supersonic gas flow with particles, shock wave, Laval nozzle.

UDC: 532.539

Received: 25.07.2011


 English version:
Journal of Applied Mechanics and Technical Physics, 2012, 53:2, 207–217

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