Eventos Anais de eventos
ENCIT 2020
18th Brazilian Congress of Thermal Sciences and Engineering
THERMAL OXIDATIVE STABILITY OF JET FUELS IN HIGH REYNOLDS NUMBER FLOW
Submission Author:
Guilherme Dias Martins , MG
Co-Authors:
Guilherme Dias Martins, Jônatas Vicente, Mariana Tessmann Martins, Arthur Benedetti, Amir Antonio Martins Oliveira, Gerson Fernandes Araujo Junior, Mauro Iurk Rocha
Presenter: Guilherme Dias Martins
doi://10.26678/ABCM.ENCIT2020.CIT20-0663
Abstract
In this work, the characteristic flow and heat transfer parameters of the JFTOT (ASTM D3241-20) and the HiReTS (ASTM D6811-02) methods for the assessment of the oxidative thermal stability of aviation kerosene are estimated. The original HiReTS equipment was retrofitted with new technologies. Then, two kerosene samples, one fresh and the other aged, are subjected to the HiReTS test with the objective of comparing different forms of calculating the HiReTS number under conditions of very high temperature oscillations. The results indicate that the JFTOT method subjects the fuel to a higher thermal stress mostly due to the longer residence time. However, the flow and heat transfer in the JFTOT test is affected by thermally developing conditions and buoyancy. The flow and heat transfer in the HiReTS test, on the other hand, occurs under a homogeneous, radially well stirred condition, making it into a more statistically predictable test. Comparing the methods of calculating the HiReTS number, the linear extrapolation method to calculate the HiReTS number is able to filter out temperature oscillations caused by measurement uncertainty and lack of proper temperature control and should be preferred over the standard method. Further testing is needed to determine the limit for the time interval for the linear extrapolation.
Keywords
Thermal-oxidative degradation, aviation kerosene, sustainable jet fuels, green aviation
DOWNLOAD PDF VIEW PRESENTATION
