A new method for the estimation of high temperature radiant heat emittance by means of aero-acoustic levitation

• A new method for experimental estimation of radiant heat emittance was developed.
• Contactless heating and temperature measurement was done with lasers and pyrometry.
• Emittances were determined from the development of the sample temperature.
• Analytical heat transfer calculations were carried out using fluid dynamics.
• Results for a corundum sample are in good agreement with literature values.

A new method for the experimental estimation of radiant heat emittance at high temperatures has been developed which involves aero-acoustic levitation of samples, laser heating and contactless temperature measurement. Radiant heat emittance values are determined from the time dependent development of the sample temperature which requires analysis of both the radiant and convective heat transfer towards the surroundings by means of fluid dynamics calculations. First results for the emittance of a corundum sample obtained with this method are presented in this article and found in good agreement with literature values.