Increase of Life of Aircraft Gas-Turbine Engines by Improvement of Thermal Oxidation Stability and Prediction of Coking Processes

Results of the recent research in the field of improvement of the thermal oxidation stability of the jet engine fuel are described. Test results of the polyfunctional fuel addition, providing the thermal oxidation stability increase by 60 K for the TC-1 and JA-1 fuel, are given. The coking process model is developed taking into account effects of geometric and mode parameters, fuel type, material and state of the channel surface. Study results are given for the pattern of forming the coke deposits in fuel collectors of the aircraft engine combustion chambers. In basic combustion chambers the coke is shown to deposit most intensively in the flow end sections of collectors. In afterburners the coke deposits, mainly, during transient modes, in particular, at the burn moment.