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Interaction of dispersed ceramic particles and melted domains with turbulent plasma jet

DOI: 10.1615/ICHMT.2009.TurbulHeatMassTransf.1620
12 pages

Vitas Valincius
Lithuanian Energy Institute, Plasma Processing Laboratory, Breslaujos 3, 44403 Kaunas, Lithuania

V. Grigaitiene
Lithuanian Energy Institute, Plasma Processing Laboratory, Breslaujos 3, LT- 44403 Kaunas, Lithuania

Vilma Snapkauskiene
Lithuanian Energy Institute, Plazminiø technologijø sektorius, Breslaujos str. 3, LT-44403 Kaunas, Lithuania

Pranas Valatkevicius
Lithuanian Energy Institute, Breslaujos 3, LT-4440, Kaunas, Lithuania

Romualdas Kezelis
Lithuanian Energy Institute

Abstract

This paper presents experimental results of investigation on behaviour of melted ceramic material particles and melted domain in the entrance region of plasma jet outflowing from plasma chemical reactor. The process of plasma synthesis of mineral fibre, micro- and nanostructured particles has been realized in air plasma jet. It has been found that the motion and interaction of melted domains in high temperature air jet mainly depend on the precursor‘s composition, plasma jet parameters, exposure time and plasma torch construction. The interaction of plasma jet and dispersed particles depending on jet velocity and particle’s mass lasts for up to 1 ms. Particle moving in the high temperature jet for two times changes its aggregate state, whereas its velocity and temperature at control surface located at x/d=12 from the exhaust nozzle is larger than the average velocity of gas jet and depending on size and mass reaches 150−400 m·s−1.

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