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Isiphumo sobubanzi bombhobho, uxinzelelo lwenaliti kunye nobushushu obuphakathi kwiimpawu zokutshiza kwi-injini yedizili (icandelo 1)

1. Intshayelelo

I-fuel efakwe kwigumbi ibalulekile kwi-injini ye-diesel kuba ichaphazela ukusebenza kunye nokukhutshwa. Ngexesha lokutsha, isitshizi kukungenisa ngokulula ulwelo kwindawo enegesi ngombhobho ukuze ulwelo, ngokudibana kwalo nerhasi eyingqongileyo kunye nokungazinzi kwalo, luqhekeke lube ngamathontsi [1]. Iimpawu zokutshiza ziyaziwa ngokuchaphazela kakhulu ukutsha kunye neenkqubo zokukhupha kwiinjini zedizili. Ngokwandisa iimpawu zokutshiza, ukukhutshwa okukrwada okuvela kwi-injini ye-diesel eyona nto i-NOx kunye ne-PM inokucuthwa [2-4]. Uphando kwiimpawu zezitshizi zedizili zigxininise kwisiphumo sophawu lwesitshizi ekusebenzeni kwenjini njengokungenwa kwencam yokutshiza, ubude bekhefu kunye nobungakanani bethontsi kunye nokuhanjiswa kwesantya [5]. ]. Incam yencam yesitshizi yokungena iba nde njengoko uxinzelelo lwenaliti lusanda. Esi siphumo sinxulumene nobuninzi obuphezulu kunye nesantya esiphezulu samathontsi kuxinzelelo oluphezulu lwenaliti [7]. Ngokuhambelana noxinzelelo lwenaliti, isitshizi singena ngokukhawuleza kuxinzelelo oluphezulu lwenaliti [8]. Ubude bekhefu bubonisa indawo yokuyeka, apho i-spray itshintsha ukusuka kwindawo yolwelo (ulwelo oluninzi, okanye i-ligaments edibeneyo kunye ne-droplets), ukuya kwi-atomized regime ye-droplets [9]. Emva kokuqhekeka kwekholamu yolwelo ephuma kumlomo, amathontsi avelisiweyo angaqhubeka aqhekeke abe mancinci njengoko ehamba kwirhasi ejikelezileyo [10]. Ukuphuhliswa kolu tshintsho lukhokelela ekuqhekekeni kwamathontsi amancinci.

Imikhosi ehambelana noxinzelelo oluguquguqukayo, ukunyanzeliswa komhlaba kunye ne-viscosity ilawula ukuphulwa kwe-drop [11-12]. Nangona kunjalo, i-CFD sisixhobo sokuthobela sisetyenziselwa ukuqikelela indawo ebalulekileyo engenakwenziwa kuvavanyo. Kolu phando, iimpawu zesitshizi sedizili ziyaphandwa zigxile ekutshintsheni ubushushu bendawo engqongileyo, uxinzelelo lwenaliti enobubanzi bombhobho owahlukileyo ngokusebenzisa iComputational Fluid Dynamics. Olu kulinganisa lunokuthi lubambe i-droplet diameter, ukungena kokutshiza kunye nobude bokwahlukana.