Numerical modeling of the power losses in geared transmissions: Windage, churning and cavitation simulations with a new integrated approach that drastically reduces the computational effort
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Energy savings and efficient design are the new global trends. Gears are the main components in many applications like vehicle transmissions, industrial gearboxes etc. and although they are already highly efficient, there is still margin for improvement. Depending on the sector of application, energy saving produces also additional benefits such as a reduction of the pollutant emission in the automotive branch or an increased reliability/power density in compact applications like the precision planetary gearboxes. To perform efficiency improvements it is important to be able to compare different design solutions. A lot of research was made on gears but still today accurate power loss models are not available. Recently, the adoption of numerical techniques has enabled the overcoming of this problem but with the drawback of very long computational times. Considering the importance of such topic for gearbox manufacturers, the authors have developed a specific power loss calculation-tool that enables a good prediction accuracy with reasonable computational efforts. The model was validated with experimental tests performed by FZG showing good agreement
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Analysis of the Power Losses in Geared Transmissions Measurements and CFD Calculations Based on Open Source Codes Concli F; Gorla C (Elsevier Science & Technology, 2014)The increasing demand of more and more efficient gearboxes implies the need of predictive models. Models provided by literature for load independent power losses are mainly based on experimentally derived relations that ...
Churning power losses of ordinary gears: A new approach based on the internal fluid dynamics simulations Concli F; Gorla C; Della Torre A; Montenegro G (2015)The increasing need of more and more efficient gearboxes implies the need of predictive models in order to compare, during the design stage, different design solutions. The models provided by literature are mostly ...
Analysis of power losses in an industrial planetary speed reducer: Measurements and computational fluid dynamics calculations Concli F; Conrado E; Gorla C (2014)In this work, experimental and theoretical analyses of the power losses in an industrial planetary speed reducer were performed in order to define the weight of the different types of power losses in the global efficiency ...