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Second Thermal and Fluids Engineering  Conference

ISSN: 2379-1748
ISBN: 978-1-56700-430-4

ANALYSIS OF HEAT TRANSFER IN THE CONDITIONS OF TWIN PLASMA TORCH WITH TRANSFERRED DC ELECTRIC ARC

A. V. Gorbunov
Instituto Technológico de Aeronáutica, Departamento de Física, Sao Jose dos Campos, SP, Brazil

H. S. Maciel
Instituto Technológico de Aeronáutica, Departamento de Física, Sao Jose dos Campos, SP, Brazil; Universidade Brasil -São Paulo, SP, Brazil

G. Petraconi Filho
Instituto Technológico de Aeronáutica, Departamento de Física, Sao Jose dos Campos, SP, Brazil

R. S. Pessoa
Universidade Brasil -São Paulo, SP, Brazil

M. A. de Souza
"VORTEX Technologia" Ltda, Sao Jose dos Campos, SP, Brazil

A. R. Marquesi
Instituto Technológico de Aeronáutica, Departamento de Física, Sao Jose dos Campos, SP, Brazil

A. F. Bublievsky
Luikov Heat and Mass Transfer Institute of NASB, Minsk, Belarus

A. A. Halinouski
Instituto Technológico de Aeronáutica, Departamento de Física, Sao Jose dos Campos, SP, Brazil

F. Miranda
Instituto Technológico de Aeronáutica, Departamento de Física, Sao Jose dos Campos, SP, Brazil

Abstract

Analysis of high temperature heat transfer was carried out for the conditions of heat flux from partially ionized plasma to electrode walls of electric arc heater. The heater is a twin plasma torch of 80-300 kW with DC transferred electric arc and it was studied based on similarity theory analysis and the physical modeling method to obtain generalized criterial dependences for thermal efficiency of the torch and heat flux density in electrodes. The efficiency level was found to be 84-90 % at optimal torch operation. Obtained equations demonstrate that heat transfer in the torch is mostly affected by the convection factor and radiation one, and the effect of characteristic geometric simplex was found. The new established dependences can be applied to design of plasma chemical reactors for gasification, pyrolysis, vitrifying of wastes or fuels, and for nanocarbons synthesis.

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