Test Method for Stability Features of Aviation Hydraulic Fluids

DOI: 10.32758/2071-5951-2020-03-54-63

УДК 001.891:[665.6/.7]

Метод исследования стабильности свойств гидравлических жидкостей для авиационной техники

Pimenov Yu.M., Poplavsky I.V.

(Federal Autonomous Enterprise «The 25th State Research Institute for Chemology, Ministry of Defense of Russian Federation», Moscow)

Keywords: aircraft engineering, hydraulic fluids, viscosity, oxidation stability, test methods, similarity, simulation, experiment, integral estimate.


An express and cost-effective method of enhancing the informative value of stability assessment of hydraulic fluids’ properties has been proposed. The new test method provides a quantitative generalized (integral) expression and comparison of the potential hydraulic fluids property changes depending on their composition and operating conditions. Under the new method, the hydraulic fluids for modern aircraft testing is performed in conditions functionally similar to full-scale bodies, which allows to obtain the maximum of information about the properties of liquids and significantly reduce expenses. The simulation results allow to introduce a generalized feature of the hydraulic fluids properties under assessment, which is an integral estimate, characterizing the potential degradation of hydraulic fluids within the specified ranges of the key factors of application conditions. The numerical values of integral estimate demonstrate a relative advantage of one hydraulic fluid over another.


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