To Conduct Fluid Structure Interaction & Test The Feasibilty of Metal Matrix Composite for Journal B

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056

Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN:2395-0072

To Conduct Fluid Structure Interaction & Test The Feasibilty of Metal Matrix Composite for Journal Bearing

* SUJEET KUMAR PANIKA, Department of Mechanical Engineering, SHRIRAM INSTITUTE OF TECHNOLOGY , JABALPUR MP .

**Dr. Shailesh Gupta, Department of Mechanical Engineering, College Name, City. ***

Abstract: Journal bearings have been used in rotating equipment since the invention of the wheel. The objective of current researchistoconductFSI(fluidstructureinteraction)studiesonjournalbearingusingCFD.TheCADdesignofjournalbearing is developed in Creo parametric design software and FSI simulation is conducted in ANSYS simulation package. The CFD analysisandstructuralanalysisisconductedonjournalbearingtodeterminethepressureinducedandstressesinducedonit. Different materials are tested for feasibility in journal bearing and MMC’s have shown encouraging results.The total deformation induced on P100/6061 Al MMC journal bearing is found to be 41.4% lower than conventional steel journal bearing.ThetotaldeformationinducedonBoron/AlMMCjournalbearingisfoundtobe13.33%lowerthanconventionalsteel journalbearing.

Key Words: Journal Bearing, FSI

1. INTRODUCTION:

Thepurposeofbearingistoreducefrictionbetweenparts whichareinrelativemotiontoeachother. Thetwomajor categoriesofjournalbearingsarerollingelementbearings andhydrodynamicjournalbearings.Themajorfunctionof journal bearing is to “carry load between a rotor and the casewithaslittlewearaspossible”[1].

2. LITERATURE REVIEW

Li et al. [1] have conducted numerical investigation on journal bearing using techniques of Computational Fluid Dynamics. Using CFD, the effect of shear cavitation on bearing performance was investigated. The study was conducted by varying viscosity, eccentricity and speed of operations.

Novotny´ et al. [2] have conducted numerical thermohydrodynamicinvestigation onjournal bearingusingCFD. TheCFDanalysiswasconductedatdifferentrotorspeeds. The CFD simulation results have shown that CFD results overpredictedcertainoutputparameterssuchaspressure andstressascomparedtoanalyticalmodel.

Fedorynenko et al. [3] have conducted analytical and experimental testing on hybrid bearing design. The research findings have shown that hybrid bearing design have better performance with 1.5 times reduced total energyloss(inhydrostaticmode).

Figure 1: TypicalPlainJournalBearing

The bearings are found in various kinds of machineries used on daily basis i.e. wrist watch, computer disk drive and also in various machineries operating at low speeds andathighspeeds.

Fillon et al. [4] have conducted numerical analysis on hybrid bearings to determine temperature field and pressure field. The dimensions of recess depth taken for the analysis is “nominal value – h = 2 mm” and “recess diameter (nominal value – d = 170 mm)”. The research

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056

Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN:2395-0072

findings have shown that small reduction on temperature field is obtained and the “performance of hybrid bearings is improved with the recess presence, while the thermal propertiesarepreservedorslightlyenhanced”[4].

Wasilczuk et al. [5] have conducted experimental investigation on hybrid bearing. The research findings have shown that large viscosity of oil results in lower temperatureduetogreaterfrictionallosses.

3. OBJECTIVE

The objective of current research is to conduct FSI (fluid structure interaction) studies on journal bearing using CFD. The CAD design of journal bearing is developed in Creo parametric design software and FSI simulation is conductedinANSYSsimulationpackage.

4. METHODOLOGY

The CAD model of journal bearing is developed using sketchandextrudetool.Thefilmgeometryisalsomodeled indesignmodeler.

Figure3:Loadsandboundaryconditions

The loads and boundary conditions involve defining material type, material property. The energy model is turnedON.Thesolvertypeissettopressure-basedmodel. Thematerialtypeisdefinedfortheanalysis.

Figure1:CADmodelofjournalbearing

Figure4:Loadsandboundaryconditiononbearing

The pressure load is obtained from CFD analysis and is mappedoninnersurfaceofthebearing

5. RESULTS AND DISCUSSION

The CFD simulation is conducted to determine pressure inducedonjournalbearing.

Figure2:Meshedmodelofjournalbearing

Frommeshing,thenumber ofelementsgeneratedis3980 andnumberofnodesgeneratedis22221.Thegrowthrate issetto1.2andtransitionratiosetto.272.

Figure5:Inducedpressureonbearing

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056

Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN:2395-0072

Theinducedpressuredistributionincreasesfromonefree end to other free end which is represented in blue color contour for low pressure and red colored region for high pressuremagnitude.

Figure6:Equivalentstressplotonbearing

The equivalent stress plot is generated on bearing as showninfigure6above.Themaximumequivalentstressis obtained onthe open free endsof bearing. The equivalent stress distribution pattern is in close agreement with the equivalent stress distribution shown in literature. The maximum equivalentstress obtainedisatthecorneredge ofthebearingwith.14557MPa.

Figure8:TotaldeformationonbearingwithP100/6061Al material

Figure7:Equivalentelasticstrainplotonbearing

The equivalent elastic strain plot is generated on bearing as shown in figure 7 above. The maximum equivalent elastic strain obtained from the analysis is 7.27mm/mm. The total deformation plot is generated for bearing made of P100/6061 Al as shown in figure 7. The maximum deformationisobtainedatthecenterofthebearing.

Figure9:EquivalentstressonbearingwithP100/6061Al material

The equivalent stress plot is generated on bearing as shown in figure 9 above. The maximum equivalent stress obtained is at the corner edge of the bearing with .14663MPa.

Figure10:Equivalentelasticstrainonbearingwith P100/6061Almaterial

International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056

Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN:2395-0072

The equivalent elastic strain plot is generated on bearing as shown in figure 10 above. The maximum equivalent elasticstrainobtainedfromtheanalysisis4.28mm/mm.

Total deformation (mm)

T o ta l d e f o rm at ion (m m )

0.00003

0.000025

0.00002

0.000015

0.00001

0.000005

0

0.000035 carbon steel P100/6061 Al Boron/Al

Material Type

Figure11:Totaldeformationcomparison

The total deformation comparison plot is obtained from the analysis as shown in figure 11 above. The maximum deformationisobtainedforcarbonsteelwithmagnitudeof .0000321mm and minimum deformation is obtained for P100/6061Albearingwithmagnitudeof.0000188mm.

6. CONCLUSION

The FSI (fluid structure interaction) is a viable tool in analysis of journal bearing. The CFD analysis and structural analysis is conducted on journal bearing to determinethepressureinducedandstressesinducedonit. Different materials are tested for feasibility in journal bearing and MMC’s have shown encouraging results. The detailedfindingsare:

1. The total deformation induced on P100/6061 Al MMC journal bearing is found to be 41.4% lower thanconventionalsteeljournalbearing.

2. The total deformation induced on Boron/Al MMC journal bearing is found to be 13.33% lower than conventionalsteeljournalbearing. MMCjournalbearing.

3. The equivalent stress obtained for carbon steel bearing is found to be lower as compared to P100/6061AlMMCjournalbearing andBoron/Al

REFERENCES

[1] Q. Li, S. Zhang, Y. Wang, W.W. Xu, Z. Wang, Z. Wang, Principal normal stress cavitation criterion for CFD analysis of loading capacity in journal bearings, Ind. Lubr. Tribol. 71 (2019) 1047–1054, https://doi.org/10.1108/ILT-01-2019-0013.

[2]P.Novotny´,J.Hrabovsky´,J.Juracˇka,J.Klíma,V.Hort, Effectivethrustbearingmodelforsimulationsoftransient rotordynamics,Int.J.Mech.Sci.157–158(2019)374–383, https://doi.org/10.1016/j.ijmecsci.2019.04.057.

[3] D. Fedorynenko, S. Sapon, S. Boyko, A. Urlina, Increasing of energy efficiency of spindles with fluid bearings, Acta Mech. Autom. 11 (2017) 204–209, https://doi.org/10.1515/ama-2017-0031

[4] M. Fillon, M. Wodtke, M. Wasilczuk, Effect of presence ofliftingpocketontheTHDperformanceofalargetiltingpad thrust bearing, Friction. 3 (2015) 266– 274, https://doi.org/10.1007/s40544-015-0092-4

[5] M. Wasilczuk, M. Wodtke, L. Dabrowski, Field tests on hydrodynamic and hybrid operation of a bidirectional thrust bearing of a pump-turbine, Lubricants. 5 (2017), https://doi.org/10.3390/lubricants5040048

[6]Dimitrios A. Bompos., Pantelis G. Nikolakopoulos.: CFD simulation of magneto rheological fluid journal bearings, Simulation Modelling Practice and Theory, Vol. 19, pp. 1035–1060,2011.

[7]Chasalevris,A.,Sfyris,D.:Evaluationofthefinitejournal bearing characteristics, using the exact analytical solution of the Reynolds equation, Tribology International, Vol. 57, pp.216–234,2013.

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International Research Journal of Engineering and Technology (IRJET) e-ISSN:2395-0056 Volume: 10 Issue: 01 | Jan 2023 www.irjet.net p-ISSN:2395-0072

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