Publications
2021 |
Polastri Marco; Storchi Gabriele; Battarra Mattia; Montorsi Luca; Milani Massimo; Mucchi Emiliano A lumped parameter approach for the filling analysis of V6 engine lubrication systems (Journal paper) Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 236 (1), pp. 29-39, 2021. (Links | BibTeX | Tag: Battarra M., Milani M., Montorsi L., Mucchi E., Polastri M., Storchi G.) @article{, title = {A lumped parameter approach for the filling analysis of V6 engine lubrication systems}, author = {Polastri Marco; Storchi Gabriele; Battarra Mattia; Montorsi Luca; Milani Massimo; Mucchi Emiliano}, doi = {10.1177/09544070211018877}, year = {2021}, date = {2021-05-21}, journal = {Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering}, volume = {236}, number = {1}, pages = {29-39}, keywords = {Battarra M., Milani M., Montorsi L., Mucchi E., Polastri M., Storchi G.}, pubstate = {published}, tppubtype = {article} } |
Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele Design Multistage External Gear Pumps for Dry Sump Systems: Methodology and Application (Journal paper) Mathematical Problems in Engineering , 2021 , 2021. (Abstract | Links | BibTeX | Tag: Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.) @article{Guerra2021, title = {Design Multistage External Gear Pumps for Dry Sump Systems: Methodology and Application}, author = {Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele }, doi = {10.1155/2021/8888128}, year = {2021}, date = {2021-03-10}, journal = {Mathematical Problems in Engineering }, volume = {2021}, abstract = {Thanks to their manufacturing simplicity, robustness, and consolidated design knowledge, external gear pumps are widely adopted in the automotive fields. With the purpose of leading the design procedure of these positive displacement machines, within this work, the authors integrate in a comprehensive tool the salient equations adopted for the design of the major gear pump features. The presented procedure is devoted to the design of multistage external gear pumps characterized by a singular floating driving shaft supported by fluid-dynamic journal bearings. Focusing the attention on the procedure flexibility, it has been structured in three iterative calculation phases. The core section of the methodology concerns the geometrical design of the involute gear tooth profile. It is oriented to ensure a proper volumetric displacement while complying with the space requirement and the tooth manufacturing limitations. Thus, through the analytical pressure loads estimation combined with the operational parameters, the second calculation step provides the design of the driving shaft and the relevant dimensions of the journal bearings. Finally, by means of a power loss approach, the third macrosection of the procedure leads to estimating the clearances between gear tip and housing. The potentials of the methodology are exposed by describing its applications to a case study of multistage gear pump employed in the dry sump lubrication system of an automotive heavy-duty engine. Each calculation step application is outlined with reference to the proposed analytical formulation and the results of the parameters calibration are presented. Within this context, the procedure is assessed by means of a CFD analysis. The results highlight the accuracy of the methodology on the estimation of the required delivery flow rate. Aside from being accurate, flexible, and reliable, the procedure stands out for being an innovative tool within the multistage gear pump framework.}, keywords = {Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.}, pubstate = {published}, tppubtype = {article} } Thanks to their manufacturing simplicity, robustness, and consolidated design knowledge, external gear pumps are widely adopted in the automotive fields. With the purpose of leading the design procedure of these positive displacement machines, within this work, the authors integrate in a comprehensive tool the salient equations adopted for the design of the major gear pump features. The presented procedure is devoted to the design of multistage external gear pumps characterized by a singular floating driving shaft supported by fluid-dynamic journal bearings. Focusing the attention on the procedure flexibility, it has been structured in three iterative calculation phases. The core section of the methodology concerns the geometrical design of the involute gear tooth profile. It is oriented to ensure a proper volumetric displacement while complying with the space requirement and the tooth manufacturing limitations. Thus, through the analytical pressure loads estimation combined with the operational parameters, the second calculation step provides the design of the driving shaft and the relevant dimensions of the journal bearings. Finally, by means of a power loss approach, the third macrosection of the procedure leads to estimating the clearances between gear tip and housing. The potentials of the methodology are exposed by describing its applications to a case study of multistage gear pump employed in the dry sump lubrication system of an automotive heavy-duty engine. Each calculation step application is outlined with reference to the proposed analytical formulation and the results of the parameters calibration are presented. Within this context, the procedure is assessed by means of a CFD analysis. The results highlight the accuracy of the methodology on the estimation of the required delivery flow rate. Aside from being accurate, flexible, and reliable, the procedure stands out for being an innovative tool within the multistage gear pump framework. |
2020 |
Polastri Marco; Battarra Mattia; Milani Massimo; Storchi Gabriele; Montorsi Luca; Mucchi Emiliano On the 0d - 3d modelling procedure for the filling analysis of the lubrication system of internal combustion engines (Conference) BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020, (V001T01A049), 2020, ISBN: 978-079188375-4. (Abstract | Links | BibTeX | Tag: Battarra M., Milani M., Montorsi L., Mucchi E., Polastri M., Storchi G.) @conference{Polastri2020, title = {On the 0d - 3d modelling procedure for the filling analysis of the lubrication system of internal combustion engines}, author = {Polastri Marco; Battarra Mattia; Milani Massimo; Storchi Gabriele; Montorsi Luca; Mucchi Emiliano}, doi = {10.1115/FPMC2020-2798}, isbn = {978-079188375-4}, year = {2020}, date = {2020-09-09}, booktitle = {BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020}, number = {V001T01A049}, abstract = {The paper focuses on the development of a predictive numerical tool for the assessment of the filling performance of engine lubrication systems. Filling analyzes are typically carried out by means of multi-phase 3-D CFD models but, despite allowing detailed and reliable results, they require very demanding computational requirements. On this basis, a procedure for the lumped parameter modelling of the fluid domain is proposed, allowing the discretization of complex systems that cannot be straightforwardly attributable to elementary submodels. The presented criteria are then applied to the lubrication system of a heavy-duty engine, for which the filling of the circuit plays a fundamental role. Different temperature conditions are simulated, and the predictive capabilities of the numerical model are presented in terms of flow pattern and filling time of the circuit branches. The same simulations are also carried out by means of a 3-D CFD model, permitting a result comparison. The comparative analysis concerns both the overall distribution of the lubricant over time, and the local phenomena within the oil domain, in order to assess the approximation of the lumped parameter approach with respect to the more accurate three-dimensional models. Copyright © 2020 ASME.}, keywords = {Battarra M., Milani M., Montorsi L., Mucchi E., Polastri M., Storchi G.}, pubstate = {published}, tppubtype = {conference} } The paper focuses on the development of a predictive numerical tool for the assessment of the filling performance of engine lubrication systems. Filling analyzes are typically carried out by means of multi-phase 3-D CFD models but, despite allowing detailed and reliable results, they require very demanding computational requirements. On this basis, a procedure for the lumped parameter modelling of the fluid domain is proposed, allowing the discretization of complex systems that cannot be straightforwardly attributable to elementary submodels. The presented criteria are then applied to the lubrication system of a heavy-duty engine, for which the filling of the circuit plays a fundamental role. Different temperature conditions are simulated, and the predictive capabilities of the numerical model are presented in terms of flow pattern and filling time of the circuit branches. The same simulations are also carried out by means of a 3-D CFD model, permitting a result comparison. The comparative analysis concerns both the overall distribution of the lubricant over time, and the local phenomena within the oil domain, in order to assess the approximation of the lumped parameter approach with respect to the more accurate three-dimensional models. Copyright © 2020 ASME. |
Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele A design procedure for multistage external gear pumps (Conference) BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020, (V001T01A048), 2020, ISBN: 978-079188375-4. (Abstract | Links | BibTeX | Tag: Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.) @conference{2020l, title = {A design procedure for multistage external gear pumps}, author = {Guerra Davide; Polastri Marco; Battarra Mattia; Suman Alessio; Mucchi Emiliano; Pinelli Michele}, doi = {10.1115/FPMC2020-2797}, isbn = {978-079188375-4}, year = {2020}, date = {2020-09-09}, booktitle = {BATH/ASME 2020 Symposium on Fluid Power and Motion Control, FPMC 2020}, number = {V001T01A048}, abstract = {n this work, the authors present a robust and integrated procedure for the design of multi-stage gear pumps to be used in dry sump system applications. Based on the target delivery flow rate, rotational speed and fluid properties, the developed iterative method enables to directly obtain the geometrical features and the working parameters of the pump components, such as gearpair specifics, shaft and journal bearing dimensions, clearance values. The methodology is then applied to a case study in order to highlight its features and detail the achievable outcomes. Quality of the results is assessed by means of a CFD analysis, demonstrating the capability to obtain the expected volumetric efficiency}, keywords = {Battarra M., Guerra D., Mucchi E., Pinelli M., Polastri M., Suman A.}, pubstate = {published}, tppubtype = {conference} } n this work, the authors present a robust and integrated procedure for the design of multi-stage gear pumps to be used in dry sump system applications. Based on the target delivery flow rate, rotational speed and fluid properties, the developed iterative method enables to directly obtain the geometrical features and the working parameters of the pump components, such as gearpair specifics, shaft and journal bearing dimensions, clearance values. The methodology is then applied to a case study in order to highlight its features and detail the achievable outcomes. Quality of the results is assessed by means of a CFD analysis, demonstrating the capability to obtain the expected volumetric efficiency |