A method and apparatus for testing the thermal stability of...

G - Physics – 01 – N

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G01N 25/20 (2006.01) G01N 33/28 (2006.01)

Patent

CA 2167083

A method and apparatus for testing the thermal stability of an (aviation) fuel. Under pressure a fuel sample to be tested is supplied to a small-bore capillary tube (2) of a test section and the fuel in the test section is allowed to be heat stressed. The fuel sample in the test section is under turbulent flow regime. The thermal degradation of the test fuel within the section is monitored by measuring by means of contactless thermometry the outer wall temperatures along the test section and subsequent increases in these temperatures, promoted by the insulation effect of fuel degradation products. From the temperature data, thus obtained, information on the thermal stability of the fuel is derived.

Procédé et appareil utilisés pour tester la stabilité thermique d'un carburant d'aviation, dans lesquels on introduit un échantillon de carburant sous pression à tester dans un tube capillaire (2) de petit diamètre d'une partie de test puis on y laisse le carburant afin qu'il soit soumis aux contraintes de la chaleur. L'échantillon de carburant situé dans la partie de test est soumis à un régime d'écoulement turbulent. La dégradation thermique du carburant testé dans la partie associée est surveillée par mesure au moyen de dispositifs thermométriques sans contact des températures des parois extérieures de la partie de test et des augmentations subséquentes desdites températures, renforcées par l'effet isolant des produits de décomposition du carburant. A partir des données de température obtenues de cette manière, on déduit des informations relatives à la stabilité thermique du carburant.

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