Experimental study of the heat transfer process of air around atmospheric arc plasma

F. Salimi Meidanshahi; Kh. Madanipour; Babak Shokri

doi:10.1117/12.886009

27 May 2011 Experimental study of the heat transfer process of air around atmospheric arc plasma

F. Salimi Meidanshahi, Kh. Madanipour, Babak Shokri

Proceedings Volume 8082, Optical Measurement Systems for Industrial Inspection VII; 80823X (2011) https://doi.org/10.1117/12.886009
Event: SPIE Optical Metrology, 2011, Munich, Germany

Abstract

The experimental investigation of thermodynamic properties such heat and mass transfer of plasmas has many applications in different industries. Laboratory atmospheric arc plasma is studied in this work. The refractive index of the air around the plasma is changed because of convection phenomena. When the convection creates the air flowing around the plasma, the density and consequently, the refractive index of air are distributed symmetrically. Moiré deflectometry is a technique of wave front analysis which in both Talbot effect and moiré technique is applied for measuring phase objects. Deflection of light beam passing through the inhomogeneous medium is utilized to obtain the refractive index distribution. In experimental set-up, an expanded collimated He-Ne laser propagate through the arc plasma and the around air. The temperature distribution is obtained by use of thermo-optic coefficient of air. To calculate the thermo- optic coefficient and the refractive index of air for a given wavelength of light and given atmospheric conditions (air temperature, pressure, and humidity), the Edlén equation is used. The convective heat transfer coefficient is obtained by calculating the temperature gradient on the plasma border. This method is not expensive, complicated and sensitive to environmental vibrations.

Citation Download Citation

F. Salimi Meidanshahi, Kh. Madanipour, and Babak Shokri "Experimental study of the heat transfer process of air around atmospheric arc plasma", Proc. SPIE 8082, Optical Measurement Systems for Industrial Inspection VII, 80823X (27 May 2011); https://doi.org/10.1117/12.886009

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