One of the most complex issues during a hypersonic Plasma Wind Tunnel test is to control the high heat flow and towel as measure the thermal protection system surface temperature, that can reach up to 3000 °C. It is reported in the following a CIRA laboratory experimental result that has demonstrated the availability to realize temperature surfaces measurements with the new method measurement technique of the two-color thermography with the twocolor thermography: a technique based on multispectral IR radiation measurements. To perform this experimental verification, a temperature of steel plate heated by means ceramic heating device was carried out by means FLIR camera SC5000, previously calibrated using a blackbody device emitter for three band pass filters of 3.80 3.90 and 3.97 μm, respectively. This thermal camera is provided of a drum that can accommodate up to 4 filters and it can switch from one filter to another by in tenth of a second. The surface plate temperature measured by IR camera by means two narrow spectral band filters have been compared with ones measured by four K-type thermocouples positioned around the area focused by IR camera The results have shown that this innovative measurement technique allows to measure the surface temperature with a relative uncertainty lower than 4- 5%, moreover every dependence by the emissivity has been eliminated.
DUAL-COLOR THERMOGRAPHY TECHNIQUE VALIDATION FOR SPACE REENTRY MATERIALS PLASMA WIND TUNNEL TESTS / M., De Cesare; F., De Filippis; L., Savino; Musto, Marilena; G., Rotondo. - (2014). (Intervento presentato al convegno 6th International Workshop on Radiation of High Temperature Gases in Atmospheric Entry tenutosi a St Andrews, UK. nel 24-28 November 2014).
DUAL-COLOR THERMOGRAPHY TECHNIQUE VALIDATION FOR SPACE REENTRY MATERIALS PLASMA WIND TUNNEL TESTS
MUSTO, MARILENA;
2014
Abstract
One of the most complex issues during a hypersonic Plasma Wind Tunnel test is to control the high heat flow and towel as measure the thermal protection system surface temperature, that can reach up to 3000 °C. It is reported in the following a CIRA laboratory experimental result that has demonstrated the availability to realize temperature surfaces measurements with the new method measurement technique of the two-color thermography with the twocolor thermography: a technique based on multispectral IR radiation measurements. To perform this experimental verification, a temperature of steel plate heated by means ceramic heating device was carried out by means FLIR camera SC5000, previously calibrated using a blackbody device emitter for three band pass filters of 3.80 3.90 and 3.97 μm, respectively. This thermal camera is provided of a drum that can accommodate up to 4 filters and it can switch from one filter to another by in tenth of a second. The surface plate temperature measured by IR camera by means two narrow spectral band filters have been compared with ones measured by four K-type thermocouples positioned around the area focused by IR camera The results have shown that this innovative measurement technique allows to measure the surface temperature with a relative uncertainty lower than 4- 5%, moreover every dependence by the emissivity has been eliminated.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
