Obtaining Precise Churning Loss for a Gearbox Using Advanced Smoothed Particle Hydrodynamics

Menon, Muraleekrishnan; Schifko, Martin; Peng, Chong; Chitneedi, Bhargav Krishna; Borra, Ravi Kanth

doi:10.4271/2019-01-0348

Cited by 7 publications

(3 citation statements)

References 21 publications

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“…Modelling a multiphase gearbox was the goal of [65] but the results have not validated yet. In [17,66], the meshless approaches were used to estimate the churning losses in gearboxes. In [63] a speed reducer with complex shapes have been simulated.…”

Section: Categorization Of Relevant Papers Exploiting the Static Mesh...mentioning

confidence: 99%

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Computational Fluid Dynamics Applied to Lubricated Mechanical Components: Review of the Approaches to Simulate Gears, Bearings, and Pumps

Maccioni

Concli

2020

Applied Sciences

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The lubrication of the mechanical components reduces friction, and increases the efficiency and the reliability. However, the interaction of moving components with the lubricant leads to power losses due to viscous and inertial effects. Nowadays, the study of lubricant behavior can be carried out through computational fluid dynamics (CFD) simulations. Nevertheless, the modeling of the computational domain within complex mechanical systems (e.g., ordinary, planetary and cycloidal gearboxes, roller bearings, and pumps) requires the exploitation of specific CFD techniques. In the last decades, many mesh-based or meshless approaches have been developed to deal with the complex management of the topological changes of the computational domain or the modeling of complex kinematics. This paper aims to collect and to classify the scientific literature where these approaches have been exploited for the study of lubricated mechanical systems. The goal of this research is to shed a light on the current state of the art in performing CFD analysis of these systems. Moreover, the objective of this study is to stress the limits and the capabilities of the main CFD techniques applied in this field of research. Results show the main differences in terms of accuracy achievable and the level of complexity that can be managed with the different CFD approaches.

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Section: Categorization Of Relevant Papers Exploiting the Static Mesh...mentioning

confidence: 99%

“…The applicability of these meshless methods to very complex systems has been verified in many studies [14][15][16]. However, these methods are mainly appropriate for determining the lubricant flow patterns rather than for understanding the microscopic behavior or calculating the shear forces transmitted to mechanical components [3,16,17].…”

Section: Introductionmentioning

confidence: 99%

Computational Fluid Dynamics Applied to Lubricated Mechanical Components: Review of the Approaches to Simulate Gears, Bearings, and Pumps

Maccioni

Concli

2020

Applied Sciences

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“…Other interesting works about CFD and churning power loss can be found in the literature. [16][17][18][19][20][21][22] Questions then arise: can this CFD method be applied to calculate the churning power loss of the intermediate gearbox? Furthermore, what would happen when considering the mesh of spiral bevel gears and the interaction between housing wall and gears?…”

Section: Introductionmentioning

confidence: 99%

Churning power loss of the intermediate gearbox in a helicopter under splash lubrication

Wang

Bao

et al. 2021

Proceedings of the Institution of Mechanical Engineers, Part J:

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Based on computational fluid dynamics, a two-phase flow model was established to calculate the churning power loss of the spiral bevel gears under splash lubrication. The error between the simulation results and experiment results is only 7.04%. Taking a certain helicopter as an example, the churning power loss of the intermediate gearbox is ∼2.6051 kW, accounting for ∼1.93% of the input power. Besides, the motion mechanisms of free flow, ejection flow and splashing flow of the spiral bevel gear were investigated. The influences of the rotational speed and oil immersion depth on the churning power loss were analysed. The rotational speed and oil immersion depth of the intermediate gearbox should be in the range of 3000–5000 r/min and 17–26 mm, respectively, which can ensure sufficient lubrication and low churning power loss.

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A combined experimental and computational study of lubrication mechanism of high precision reducer adopting a worm gear drive with complicated space surface contact

Deng

Wang

Hammi

et al. 2020

Tribology International

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Obtaining Precise Churning Loss for a Gearbox Using Advanced Smoothed Particle Hydrodynamics

Cited by 7 publications

References 21 publications

Computational Fluid Dynamics Applied to Lubricated Mechanical Components: Review of the Approaches to Simulate Gears, Bearings, and Pumps

Computational Fluid Dynamics Applied to Lubricated Mechanical Components: Review of the Approaches to Simulate Gears, Bearings, and Pumps

Churning power loss of the intermediate gearbox in a helicopter under splash lubrication

A combined experimental and computational study of lubrication mechanism of high precision reducer adopting a worm gear drive with complicated space surface contact

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