Performance Modelling - A Tool for Lubricant Development,
AIR FORCE WRIGHT AERONAUTICAL LABS WRIGHT-PATTERSON AFB OH MATERIALS LAB
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A basic requirements for the development of lubricants and aerospace fluids is to understand the physical properties of these fluids required to optimize performance of the lubricated system. Computer models have been used to predict the effects of lubricant properties on rolling element bearing performance. Studies were performed to validate models, to predict performance under various operating conditions, and to predict the effects of proposed design or lubricant changes on system performance. The results of some of these studies are described and compared with experimental measurements. Models which predict traction forces in lubricated contacts from thermal and rheological properties of the lubricant and bearing materials, and the geometry and operating conditions of the contact are compared with experimental results from a two disk traction device with a micro-computer based controldata acquisition system. The capabilities of models with the ability to predict the performance of hydraulic systems, the components making up these systems and lubricated contacts within the components are described and the methodology of studies to determine required fluid properties discussed.