CFD analysis of hydrodynamic journal bearing operating with non-Newtonian lubricant

Mehrotra, Pranav; Seth, Paras; Nagpal, Ishaan; Rastogi, Devansh; Kumar, Vivek

doi:10.47974/JIM-2005

Open Access Research Article

CFD analysis of hydrodynamic journal bearing operating with non-Newtonian lubricant

^*Pranav MehrotraCorresponding authorpranavm1002@gmail.comDepartment of Mechanical Engineering Netaji Subhas University of TechnologyDwarka, New Delhi, 110078, IndiaView full profile → , Paras Sethparasseth93@gmail.comDepartment of Mechanical Engineering Netaji Subhas University of TechnologyDwarka, New Delhi, 110078, IndiaView full profile → , Ishaan Nagpalinagpal17602@gmail.comDepartment of Mechanical Engineering Netaji Subhas University of TechnologyDwarka, New Delhi, 110078, IndiaView full profile → , Devansh Rastogidevanshrastogi225@gmail.comDepartment of Mechanical Engineering Netaji Subhas University of TechnologyDwarka, New Delhi, 110078, IndiaView full profile → , Vivek Kumarvalueadmire@gmail.comDepartment of Mechanical Engineering Netaji Subhas University of TechnologyEXL Service Holding LLCJersey City, New Jersey, 07302, United StatesView full profile →

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pp. 1637–1661Vol. 27Issue 7November 2024DOI: 10.47974/JIM-2005XML

Received:: 11 Sep 2024
Published Online:: 30 Nov 2024
Article type:: Research Article
Language:: EN
Article no.:: JIM-2005
Pages:: 1637–1661

Abstract

The hydrodynamic journal bearing is a crucial machine element used to support radial load in turbomachines. The research in journal bearings focuses on enhancing the steady state and dynamic performance indices. This study deals with the CFD simulations of hydrodynamic journal bearing operating with non-Newtonian lubricants. The CFD simulations have been performed using the Fluent module of Ansys 2023. The Power law fluid model has been used to describe the non-Newtonian character of the lubricant. The plots are generated for maximum fluid pressure, film pressure distribution, and turbulence dissipation for the Newtonian, pseudoplastic, and Dilatant nature of lubricant. Insights into fluid film pressure distribution and turbulence dissipation rates inform guiding designers for improved performance. Understanding maximum pressure trends is vital for design assessment, preventing failures, and optimizing the durability of the hydrodynamic journal bearings. Practical applications for machine designers include a comprehensive understanding of design parameters’ impact on performance, ensuring reliability in turbomachines. Overall, the research contributes to the field, offering academic and simulation insights of a hydrodynamic journal bearing.

Keywords

Hydrodynamic journal bearing Computational fluid dynamics Non-newtonian lubricant

Subject Classifications

76A0576N20

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