Eventos Anais de eventos
COBEM 2021
26th International Congress of Mechanical Engineering
ASSESSMENT OF FOULING FORMED BY THERMO-OXIDATIVE DEGRADATION OF JET FUEL IN TURBULENT FLOW IN ACAPILLARY TUBE
Submission Author:
Mariana Tessmann Martins , SC , Brazil
Co-Authors:
Mariana Tessmann Martins, Jônatas Vicente, Guilherme Dias Martins, Arthur Benedetti, Edimilson Oliveira , Amir Antonio Martins Oliveira, Andressa Cristina De Rossi, Gerson Fernandes Araujo Junior, Mauro Iurk Rocha
Presenter: Mariana Tessmann Martins
doi://10.26678/ABCM.COBEM2021.COB2021-2274
Abstract
Jet fuel is used as cooling fluid in the propulsion system of jet aircrafts. The repetition of heating and cooling cycles may cause oxidative thermal degradation of the fuel, leading to the formation of insoluble deposits at the surface of pipes and orifices. In the High Reynolds Thermal Stability test (HiReTS test), a turbulent fuel flow in a capillary tube is heated, leading to thermal degradation and deposition of insoluble solid deposits at the tube surface. The amount of fouling formed during a fixed test time is used as an index to measure the thermal stability of the fuel sample. In this work, a direct method for measuring the amount of fouling is proposed using a gravimetric method combined with chemical removal. The method is applied to thermally stable and unstable fuel samples. The results are compared to the indirect measurements and a correlation is found between the mass of fouling and its thermal resistance. The method developed will allow for the estimation of the kinetics of formation of solid deposits in an accelerated degradation test, contributing for the development of fuels and fuel systems.
Keywords
fouling, Thermal-oxidative degradation, Stability of jet fuel, Fuel system
