Volume 19, Issue 1 (January 2019)                   Modares Mechanical Engineering 2019, 19(1): 151-157 | Back to browse issues page

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Maleki Varnoosfaderani M, Dashti Rahmatabadi A, Dehghan A. Analysis of Static Performance of Noncircular Lobed Journal Bearings with Lubricants Containing TiO2 Nanoparticles Using Couple Stress Fluid Model. Modares Mechanical Engineering 2019; 19 (1) :151-157
URL: http://mme.modares.ac.ir/article-15-21374-en.html
Analysis of Static Performance of Noncircular Lobed Journal Bearings with Lubricants Containing TiO2 Nanoparticles Using Couple Stress Fluid Model
M. Maleki Varnoosfaderani1 , A. Dashti Rahmatabadi * 2, A.A. Dehghan1
1- Mechanical Engineering Department, Mechanical Engineering Faculty, Yazd University, Yazd, Iran
2- Mechanical Engineering Department, Mechanical Engineering Faculty, Yazd University, Yazd, Iran , dashti@yazd.ac.ir
Abstract:   (3216 Views)
In recent years, due to the increase in the speed of rotary machineries, demands for enhanced lubrication and bearing design to overcome this challenge has increased. To satisfy these need, researchers have proposed additive contained lubricants such as Nano-lubricants and bearings with different designs such as noncircular lobed bearings. In this article, effects of preload and aspect ratio on static performance of noncircular lobed journal bearings of finite length lubricated with lubricant containing TiO2 Nano-particles for particle volume fraction of 0.01 are studied. Using finite element method, the steady-state film pressure is obtained by solving the modified Reynolds equation based on the Nano-lubricants and Couple Stress model theories. With the help of film pressure, attitude angle, friction coefficient, friction force, and side leakage of noncircular lobed journal bearings are obtained. The results show that using lubricants containing TiO2 Nano-particles can enhance the performance of static characteristics of two, three, and four lobed journal bearings. According to results, increase in preload and bearing length will increase load carrying capacity noncircular lobed bearings. Based on results, choosing proper design parameters can have great impact on static performance of noncircular lobed journal bearings.
Keywords: Noncircular Bearing Nano-Lubricants Static Performance TiO2 Nano-Particles Couple Stress Model
Full-Text [PDF 552 kb]   (2442 Downloads)    
Article Type: Original Research | Subject: Aerospace Structures
Received: 2018/05/26 | Accepted: 2018/10/3 | Published: 2019/01/1
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