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

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.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/11588/597378
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus ND
  • ???jsp.display-item.citation.isi??? ND
social impact