EFFECT OF SURFACE ROUGNESS ON FINITE POROUS JOURNAL BEARING LUBRICATION OF MICROPOLAR FLUID WITH SQUEEZING EFFECT
DOI:
https://doi.org/10.29121/shodhkosh.v5.i1.2024.3488Keywords:
Surface Roughness, Porous Journal Bearings, Squeeze Films, Micropolar Fluids, Static And Dynamic BehaviorsAbstract [English]
In this paper, a theoretical analysis of the effect of surface roughness on the squeeze film lubrication of finite porous journal bearings with micropolar fluids is studied. A more generalized form of surface roughness is mathematically modeled by a stochastic random variable with non-zero mean, variance and skewness. The generalized average Reynolds type equation is derived for the squeeze film lubrication of finite rough porous journal bearings with micropolar fluids as lubricant. The closed form expressions are obtained for the fluid film pressure, load carrying capacity, journal centre velocity and locus of the journal centre. The cases of a constant applied load and an alternating applied load are analyzed under a cyclic load the micropolar fluids provide a reduction in the journal centre velocity. Further, it is numerical computations of the results show that the negatively skewed surface roughness pattern increase fluid film pressure, load carrying capacity and decreases the journal centre velocity. Where as adverse effects were found for the positively skewed surface roughness pattern. The effect of porous parameter causes reduction in fliud film pressure, load carrying capacity and enhances the journal centre velocity.
References
Eringen AC. Theory of micropolar fluids. J. Mathematics and mechanics 1966; 16:1-18. DOI: https://doi.org/10.1512/iumj.1967.16.16001
Eringen AC. Simple microfluids. Int. J. Engng Science, 1964 ; 2 :205-217. DOI: https://doi.org/10.1016/0020-7225(64)90005-9
Zaheeruddin KH, Isa M. Micropolar fluid lubrication of one-dimensional journalbearing. Wear 1978; 50: 211-220.
Huang TW. Analysis of finite width journal bearing with micropolar fluids. Wear 1988; 123:1-12. DOI: https://doi.org/10.1016/0043-1648(88)90082-8
Khonasari MM, Brewe D. On the performance of finite journal bearings lubricated with micropolar fluid. Tribology Tran 1989; 32(2):155-160. DOI: https://doi.org/10.1080/10402008908981874
Ramanaiah G, Dubey JN. Optimum slider profile of a slider bearing lubricated with a micropolar fluid. Wear 1977; 76:199-209. DOI: https://doi.org/10.1016/0043-1648(77)90162-4
Naduvinamani NB, Siddangouda A. on the performance of rough inclined Stepped composite bearings with micropolar fluid. J. of Marine Science & Tech.2010; 18(2): 233-242. DOI: https://doi.org/10.51400/2709-6998.2322
Bujurke NM, Bhavi SG, Hiremath PS. Squeeze film lubricated with micropolar fluids. Proc. Indian natn. Sci. acad 1987;53 A: 391-398.
Agrawal VK, Ganju KL, Jethi SC. Squeeze film and externallypressurized bearings lubricated with micropolar fluid. Wear 1972; 19:259-265. DOI: https://doi.org/10.1016/0043-1648(72)90118-4
Balaram M, Micropolar squeeze film. J. Lubri. Tech.1975; 635-637. DOI: https://doi.org/10.1115/1.3452693
Prakash J, Sinha P. Cyclic squeeze films in micropolar fluid lubricated journal bearings. Trans ASME. J .Lubri. Technol. 1975;98 : 412-417. DOI: https://doi.org/10.1115/1.3452873
Sinha P. Dynamically loaded micropolar fluid lubricated journal bearings with special reference to the squeeze films under fluctuating loads. Wear 1977; 45: 279-292. DOI: https://doi.org/10.1016/0043-1648(77)90020-5
Isa M, Zaheeruddin K. One dimensional porous journal bearing lubricated with micropolar fluid. Wear 1978; 50(2): 211-220. DOI: https://doi.org/10.1016/0043-1648(78)90069-8
Verma PDS, Agrawal VK, Bhat SB. Porous inclined slider bearing lubricated with micropolar fluid. Wear 1979; 53:101-106.
Naduvinamani NB, Huggi SS. Micropolar fluid squeeze film lubrication of short partial porous journal bearing. J. Engg. Tribol. 2009; (223): 1179-1185. DOI: https://doi.org/10.1243/13506501JET627
Christensen H. Stochastic models for hydrodynamic lubrication of rough surfaces. Proc. of Instn. Mech. Engrs. Part I 1969-1970; 184:1013-1026. DOI: https://doi.org/10.1243/PIME_PROC_1969_184_074_02
Christensen H, Tonder K. The hydrodynamic lubrication of rough bearing surfaces of finite width. ASME J. Lubri. Tech. 1971; 93: 324-330. DOI: https://doi.org/10.1115/1.3451579
Prakash J, Tiwari K. An analysis of squeeze film between porous rectangular plates including the surface roughness effects. Journal of Mechanical Engineering Science. 1982b; 24(1): 45-49. DOI: https://doi.org/10.1243/JMES_JOUR_1982_024_009_02
Prakash J, Tiwari K. Effects of surface roughness on the squeeze film between rotating porous annular discs. Journal of Mechanical Engineering Science. 1982c; 24(3): 155-161. DOI: https://doi.org/10.1243/JMES_JOUR_1982_024_029_02
Gururajan K, Prakash J. surface roughness effects in infinitely long porous journal bearings. ASME Journal of Tribology, 1999; 121: 139-147. DOI: https://doi.org/10.1115/1.2833795
Gururajan K, Prakash J. Effects of surface roughness in a narrow porous journal bearing, ASME Journal of Tribology, 2000; 122: 472-475. DOI: https://doi.org/10.1115/1.555387
Naduvinamani NB, Kashinath B. Surface roughness effecte on the static and dynamic behaviour of squeeze film lubrication of short journal bearings with micropolar fluids. J. Engg. Tribol.2008; 222: 1-11. DOI: https://doi.org/10.1243/13506501JET322
Naduvinamani NB, Santosh S. On the squeeze film lubrication of rough short porous partial journal bearings with micropolar fluid. J. Engg. Tribol. 2009;224: 249-257 . DOI: https://doi.org/10.1243/13506501JET670
Andharia PI. Gupta JL., Deheri GM. Effect of surface roughness on hydrodynamic lubrication of slider bearings. Tribol Trans. 2001; 44(2): 291- 297. DOI: https://doi.org/10.1080/10402000108982461
Verma PDS, Agrawal VK, Bhat SK. Porous inclined slider bearing lubricated with micropolar fluid. Wear 1979 ;53: 101-106. DOI: https://doi.org/10.1016/0043-1648(79)90221-7
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