ThermalCFDstressanalysisofanV8-Engineijsetr.org/wp-content/uploads/2019/05/IJSETR-VOL-8... · (b.tec)MECHANICALENGINEER DesignerINDIANRAILWAYS. ABDULMOYEED (b.tech)MECHANICAL ENGINEER

International Journal of Science, Engineering and Technology Research (IJSETR)Volume 8, Issue 5, May 2019, ISSN: 2278 -7798

147All Rights Reserved © 2019 IJSETR

Abstract— An engine basically is defined as a device which

converts chemical energy of the fuel into heat energy andfurther into mechanical output. Based on classifications thereare variety of engines based on the size, position of piston, andfarther classification, consideration of various parameters isimportant so as for the efficient working of an engine. One ofthem being the heat dissipation. Heat dissipation is animportant factor because overheating the engine may not justonly reduce its overall performance but may develop thermalstresses, fatigue and over all reduce in the working life cycle ofan engine. The paper tries to investigate the thermaldistribution of a v8 turbo charge engine block and tries toanalyze the cooling effect of air by CFD

Index Terms— engine, parameters, efficient, dissipation,thermal, stresses., CFD

1. INTRODUCTIONAutomobile system comprises of various components

form the power producing unit, cooling systems, brakingmechanisms etc. engine is considered as the heart of theautomobile. For its efficient working various factorsgoverns the system. One of it being the combustion heatdissipation which if unchecked may lead to thedevelopment of thermal stress reducing the overallperformance, lifecycle of the engine. The paper tries toinvestigate the thermal distribution of engine in astationary state and then tries to calculate the thermal lossof heat to the atmosphere in an CFD environment.

2. Material selectionThe Selection of material depends on many factorsconsidering for the cost, operating conditions such astemperature, pressure, etc. which varies from working incommercial vehicle to sports vehicle the factors of load,torque, power, are also considered. So, an efficientmaterial is one which has low cost but could withstandhigh working thermal, structural stress. The materialranges from iron, steel, aluminum etc. the properties ofthe various materials are shown below in the table.

3.Manual calculations

The construction of an engine is mainly divided into threesection engine head, engine block, crankcase. Various subcomponents for the section are modeled using thecalculations shown below.

3.1 cylindersThe formulations are taken from the calculation of pressurevessel etc.

1. Mohammed Nomaan 2. Mohammed Moizuddin.3. Adnan Hashmi 4. Mohammed RuhailMasood 5. abdul Moyeed

Thermal CFD stress analysis of an V8-Engine



4.CAD DESIGNING OF ENGINE

The following geometry was created in space claim designmodeler as per the part standardization. Space claim is aversatile excellent designing tool for CAD designing.Various features have been included in the model so as toget accurate results during analysis.

5.Design analysis

The design was generated in the space claim software.Then was transferred to ANSYS for various analysis. thefirst one being the thermal analysis in which the thermalloads were applied inside the cylinder virtually for thecombustion temperature with an overall convectiveboundary condition for the geometry. then the engineblock was placed in a cfd environment to analyze thecooling effect of air on the engine block. The next partwas the effect of the combustion pressure on thegeometry.

6.CFD THERMAL ANALYSIS



7.STRESS ANALYSIS OF ENGINE UNDER VARIOUSWORKING CONDITIONS

The following stress analysis was carried out for a v8engine the base was fixed and a varying pressure wasapplied and the von mises stress was checked the resultsare tabulated in the table as follows.

Fig 7.1 shows von mises stress for a pressure of 12 bars







8. Graph and tables

The following shows the table values and graphcalculated.

From the above data the equation calculated for they=-0.0075x2 +1.2358x

computing for the first derivative to calculate theconvergence of the curve we get.

calculating the maxima function concludes that deviationis achieved at (82.387,50.907) i.e.

fig 8.3 shows the deviation graph

7.conclusionThe paper tries to investigate the thermal distributionover a v8 cylinder block and the cooling effect of air atinlet velocity of 9 m/sec in the second phase the stressdistribution is noted for varying combustion pressure ofranging from 12, 14, 16, 18, 26 bar distribution deviation isnoted.

8.ACKNOWLEDGMENT

The above work done is not a single effort it required a lot ofguidance, collaboration of collogue, working at a brainstorming levelwhatever we have done is due to such guidance and assistance given bythem. Optimizing a design requires various factors to be checked. It’snot only about a single criterion of concerns but for the overall efficientdesign. manufacturing procedures also have to be taken intoconsideration. I would again thank to my college for keeping the trust inthe work and their hard work. Its all the process starting from scratchand concluding to a design which is efficient, better and optimized in itsperformance.



9. REFERENCES

[1] S.G. Kandlikar, J. Sergi, J. LaManna, M. Daino,” HydrogenHorizon”, Mechanical Engineering, The Magazine of ASME vol.131, No.5, pp.32, 2009.

[2] C.M. White, R.R. Steeper, A.E. Lutz,” The hydrogen-fueledinternal combustion engine: a technical review”, Int. J. HydrogenEnergy vol. 31, pp. 1292 – 1305, 2006.

[3] NASA technical briefs, 2004.

[4] D. V. Hutton, “Fundamentals of Finite Element Analysis “,International Edition, McGraw Hill, 2004.

[5] ALGOR V22 User Manual, 2008.

[6] J. B. Heywood, “Internal combustion engine fundamentals”, NewYork: McGraw-Hill, 1988.

[7] C.H. Li, “Piston thermal deformation and frictionconsiderations”, SAE Paper 820086, 1982.

[8] R. Prasad and N.K. Samria,” Transient heat transfer analysis inan internal combustion engine piston”, Computers & Structures vol. 34,No. 5, pp. 781-193. 1990.

[9] V. Esfahanian, A. Javaheri, M. Ghaffarpour,” Thermal analysisof an SI engine piston using different combustion boundary conditiontreatments”, Applied Thermal Engineering vol. 26, pp. 277–287, 2006.

[10] L. Yong and R.D. Reitz, “Modeling of heat conduction withinchamber walls for multidimensional internal combustion enginesimulation”, Int. J. Heat and Mass Transfer vol. 41, pp.859– 869, 1988.

[11] Y. Rasihhan and F.J. Wallace,” Temperature transients onengine combustion chamber walls – I. Finite difference formulation,validation and grid optimization”, Int. J. Mech. Sci. vol. 33, No. 10,pp.793-803, 1991.

[12] Y. Rasihhan and F.J. Wallace,” Temperature transients onengine combustion chamber walls – II. Geometry and general materialproperty including temperature-dependent effects”, Int. J. Mech. Sci.vol. 33, No. 10, pp.793-803, 1991.

[13] Y. Rasihhan and F.J. Wallace,” Temperature transients onengine combustion chamber walls – III. Application of finite differencemodel to various metals and ceramic walls”, Int. J. Mech. Sci. vol. 33,No. 10, pp. 863-874, 1991.

MOHAMMED NOMAAN(b. tech) MECHANICAL ENGINEER(m. Tech) machine design

MOHAMMEDMOIZUDDIN(b. tech) MECHANICAL ENGINEER

ADNAN HASHMI(b. tech) MECHANICALENGINEER

MOHAMMED RUHAIL MASOOD(b.tec) MECHANICAL ENGINEERDesigner INDIAN RAILWAYS.

ABDULMOYEED(b.tech)MECHANICALENGINEER

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ThermalCFDstressanalysisofanV8-Engineijsetr.org/wp-content/uploads/2019/05/IJSETR-VOL-8... · (b.tec)MECHANICALENGINEER DesignerINDIANRAILWAYS. ABDULMOYEED (b.tech)MECHANICAL ENGINEER