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Umphumela wobubanzi be-nozzle, ingcindezi yomjovo kanye nezinga lokushisa elizungezile ezicini zokufutha enjinini kadizili (ingxenye 1)

1. Isingeniso

Uphethiloli ojovwe egunjini ubalulekile enjinini kadizili ngoba inomthelela ekusebenzeni nasekuphumeni kwayo. Ngesikhathi sokusha, isifutho simane siwukwethulwa koketshezi endaweni enegesi ngombhobho ukuze uketshezi, ngokusebenzisana kwalo negesi elizungezile nangokungazinzi kwalo, luqhekeke lube amaconsi [1]. Izici zokufutha ziyaziwa ukuthi zibe nomthelela omkhulu ekushiseni nasekukhipheni imfucuza ezinjinini zikadizili. Ngokwandisa izici zesifutho, ukukhishwa kwegesi eluhlaza okuvela enjinini kadizili ikakhulukazi okuyi-NOx ne-PM kungancishiswa [2-4]. Uphenyo lwezici zezifutho zikadizili lugxile emthelela wesici sokufutha ekusebenzeni kwenjini njengokungena kwephuzu lesifutho, ubude bokuphuka kanye nosayizi wamaconsi kanye nokusabalalisa kwesivinini [5].Umfutho womjovo unomphumela omkhulu ekungeneni koketshezi lwesifutho [6 ]. Ukungena kwethiphu yesifutho kuba isikhathi eside njengoba umfutho womjovo ukhula. Lo mphumela uhlobene kokubili ubuningi obuphezulu kanye nesivinini esiphezulu samaconsi ekucindezelweni komjovo okuphezulu [7]. Ngokuhambisana nengcindezi yomjovo, isifutho singena ngokushesha ekucindezelweni komjovo okuphezulu [8]. Ubude bokuhlukana bubonisa iphuzu lokungaqhubeki, lapho isifutho sishintsha sisuka endaweni yoketshezi (uketshezi oluningi, noma imigqa namaconsi axhumene), siye esimweni se-athomu esakhiwe kahle samaconsi [9]. Ngemva kokuhlakazeka kwekholomu ewuketshezi ephuma emlonyeni, amaconsi akhiqiziwe angase aqhubeke ehlukana abe amancane njengoba eqhubekela kugesi elizungezile [10]. Ukuthuthukiswa kwalokhu kuguqulwa kuholela ekuhlukaneni kube amaconsi amancane.

Amandla ahlotshaniswa nokucindezela okuguquguqukayo, ukungezwani kwendawo kanye ne-viscosity alawula ukuhlukana kokwehla [11-12]. Kodwa-ke, i-CFD iyithuluzi lokuyekethisa elisetshenziselwa ukubikezela ingxenye ebalulekile engeke yenziwe ekuhlolweni. Kulolu cwaningo, izici ze-spray diesel ziyaphenywa kugxilwe ekushintsheni izinga lokushisa elizungezile, ingcindezi yomjovo enobubanzi bombumbulu obuhlukile kusetshenziswa iComputational Fluid Dynamics. Lokhu kulingisa kungathwebula ububanzi beconsi, ukungena kwesifutho nobude bokuhlukana.