a De part ment of Man u fac tur ing En gi neer ing, Anna Uni ver sity, Chennai, In dia b Me chan i cal En gi neer ing De part ment, Anna Uni ver sity, Chennai, In dia Orig i nal sci en tific pa perIn mod ern re search, sim u la tion has be come a pow er ful tool as it saves time and also eco nom i cal when com pared to ex per i men tal study. This pa per deals with a com pre hen sive model of a spark ig ni tion hy dro gen fu eled en gine. Woschni's heat trans fer co-re la tion is used by this model for pre dict ing the heat trans fer in the engine. Two zone com bus tion model has been opted for sim u lat ing the com bus tion pro cess. Two zone mod els ac count for the com bus tion cham ber ge om e try and for the pres ence of burnt and un burnt gases. The re sults are com pared with the ex per imen tal data and it is found that there was a good con ver gence of re sults. The en gine ef fi ciency and power has been slightly over pre dicted be cause dis so ci a tion has not been in cluded in the model.
In tro duc tionCon sid er ing the en ergy cri sis and pol lu tion prob lems, in ves ti ga tions have been concen trat ing on re duc ing the fuel con sump tion and low er ing the con cen tra tion of toxic com ponents in com bus tion prod ucts by opt ing for al ter na tive fu els. Hy dro gen is con sid ered as an ideal al ter na tive fuel. Many re search ers have stud ied en gine per for mance and emis sion by us ing hydro gen as a fuel. Hy dro gen has been rec og nized as an al ter nate fuel as it has highly de sir able prop er ties. It is the only fuel that can be pro duced from the plen ti ful re newal source wa ter. Its com bus tion in ox y gen pro duces only wa ter but in air it also pro duces ox ides of ni tro gen. Hy drogen mixes very eas ily with air to form mix ture as lean as 4% and as rich as 75% in vol ume ba sis hav ing wide flammability lim its [1].Hy dro gen can be eas ily ig nited and the flame speed is about nine times that of gas oline. Com puter sim u la tion of in ter nal com bus tion en gines are de sir able be cause of the aid they pro vide in de sign, in pre dict ing the trends, in serv ing as di ag nos tics tools, in giv ing more data than are nor mally ob tain able from the ex per i ment, and in help ing to un der stand the com plex pro cesses that oc cur in side the en gine. It also re duces the time in volved for the ex per i men tal inSakthinathan, G., et al.: Theroretical and Experimental Validation of Hydrogen Fueled .
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