INozzle ye-L246pbc yoMbane yeNqanaba kaloliwe eNtsha yesiBonelelo seFuel

Uphando ngeMpembelelo yeUmbhobho wesitofu Intshukumo yesitofu seNjini yeDizili kwiiMpawu zokuTofwa kumngxuma ngamnye (Icandelo2)

Umxholo wophando ophambili wephepha umi ngolu hlobo lulandelayo:

(1) Ngokusekwe kumthetho wogcino lwesantya kunye nethiyori kaBernoulli, inkqubo yovavanyo yeempawu zenaliti yamafutha ethutyana yomngxuma ngamnye ngokusekwe kumgaqo wokutshiza wokuqukuqela kwesantya yayilwa yaza yakhiwa. Inkqubo yovavanyo inokuqokelela isantya sokutofa ngoko nangoko kumngxuma ngamnye we-multi-hole isitofu ngaxeshanye, kwaye iqonde ingqokelela yomjikelo wexesha lokutofa kwamafutha amaninzi. Ukuchaneka kunye nokuthembeka kwenkqubo yovavanyo kuhlalutywa.

(2) Ngokusekelwe kumthombo ovulekileyo wethala leencwadi leklasi ye-C++ i-OpenFOAM? iqonga, ngesiseko se-rhoCentralFoam solver ye-compressible transonic flow, ikhowudi yokusombulula i-compressible gas-liquid yesigaba sesibini sokuhamba ngaphakathi kwi-nozzle yaphuhliswa kwaye yafakwa. Isixazululi sisebenzisa imodeli ye-homogeneous flow ukusombulula ukuhamba kwe-fuel multiphase kwi-nozzle kwaye isombulule inguqu yesigaba sesibini nge-positive equation ye-state. Ukusukela umgangatho we-RNGk-ε imodeli ye-turbulence ayichanekanga ngokwaneleyo ukusombulula ukuhamba kwe-compressible, ngokukodwa i-cavitation phenomenon kwindawo yoxinzelelo oluphantsi, imodeli ye-turbulence ihlaziywa ngokuzisa umsebenzi woxinaniso ohambelana ne-cavitation state endaweni yokuxinana rhoqo. Ukongeza, xa usombulula i-equations ka-Euler yee-compressible fluids, ngokuqhelekileyo kukho izisombululo ezingapheliyo, ezizezi ingxaki ye-Riemann, ngenxa yeempawu ezinamandla zezibalo ze-hyperbolic ze-equations.

Kweli phepha, i-Riemann solver eqikelelweyo isetyenziselwa ukucubungula ukuhamba kwamanani kwe-mesh ukubamba isisombululo esingapheliyo, oko kukuthi, i-shock wave phenomenon ye-compressible fluid. Imodeli isetyenziselwa ukuhlalutya impembelelo yeUmbhobho wesitofu intshukumo kumngxuma kumngxuma ngaphakathi umlomo wesitofu umngxuma kabini, kunye nomfuziselo CFD esekiweyo iqinisekiswa ngokusebenzisa imithetho yokutofa amafutha elinganisiweyo kumngxuma ngamnye. Iziphumo zokulinganisa zibonisa ukuba imodeli inokubamba ngokuchanekileyo i-cavitation kunye ne-turbulence quasi-sequential structure ephuhliswa ngamaxesha athile kwi-nozzle, kwaye ukuphuhliswa kwe-cavitation yomngxuma ophezulu we-nozzle unzima kakhulu kunomngxuma ongaphantsi.