Umbhobho Omusha Wangempela Womjovo Wesitimela Ovamile L246pbc Womjovo Wamafutha

Ucwaningo Ngethonya LeUmjovo womjovo Ukunyakaza Komjovo Wenjini Kadizili Ezicini Zomjovo Zembobo Ngayinye (ingxenye2)

Okuqukethwe kocwaningo okuyinhloko kwephepha imi kanje:

(1) Ngokusekelwe emthethweni wokongiwa komfutho kanye nethiyori kaBernoulli, isistimu yokuhlola izici zesikhashana zokujova uphethiloli wembobo ngayinye ngokusekelwe kumgomo wokuhlola ukugeleza komfutho wesifutho laklanywa futhi lakhiwa. Isistimu yokuhlola ingaqoqa isilinganiso esisheshayo sokujova uphethiloli wembobo ngayinye yomjovo onezimbobo eziningi ngesikhathi esisodwa, futhi ibone iqoqo lomjikelezo lezikhathi eziningi zokujova uphethiloli. Ukunemba nokuthembeka kwesistimu yokuhlola kuyahlaziywa.

(2) Ngokusekelwe kumthombo ovulekile welabhulali yekilasi le-C++ i-OpenFOAM? iplatifomu, ngesisekelo se-rhoCentralFoam solver yokugeleza kwe-compressible transonic, ikhodi yokuxazulula ukugeleza kwezigaba ezimbili zegesi-uketshezi lwezigaba ezimbili ngaphakathi kwe-nozzle yathuthukiswa futhi yafakwa. Isixazululi sisebenzisa imodeli yokugeleza kwe-homogeneous ukuxazulula ukugeleza kukaphethiloli we-multiphase ku-nozzle futhi sixazulule ukuguqulwa kwesigaba sezigaba ezimbili nge-positive pressure equation yezwe. Kusukela ku-RNGk-ε imodeli ye-turbulence ayinembile ngokwanele ukuze ixazulule ukugeleza okucindezelwayo, ikakhulukazi i-cavitation phenomenon endaweni yokucindezela okuphansi, imodeli ye-turbulence ibuyekezwa ngokwethula umsebenzi we-density ohlobene nesimo se-cavitation esikhundleni sobuningi obuqhubekayo. Ukwengeza, lapho kuxazululwa izibalo zika-Euler zoketshezi olucindezelayo, kuvame ukuba nezixazululo ezingaqhubeki, okuyinkinga ka-Riemann, ngenxa yezici zezibalo eziqinile ze-hyperbolic zezibalo.

Kuleli phepha, isixazululi se-Riemann esilinganiselwe sisetshenziselwa ukucubungula ukuguquguquka kwezinombolo kwe-mesh ukuze kuthwebule isixazululo esingaqhubeki, okungukuthi, isenzakalo se-wave shock soketshezi olucindezelayo. Imodeli isetshenziselwa ukuhlaziya umthelela we-Umjovo womjovo ukunyakaza emgodini wokugeleza ngaphakathi komlomo womjovo onembobo ephindwe kabili, futhi imodeli emisiwe ye-CFD iqinisekiswa ngokusebenzisa imithetho elinganiselwe yomjovo kaphethiloli wembobo ngayinye. Imiphumela yokulingisa ibonisa ukuthi imodeli ingakwazi ukuthwebula ngokunembile i-cavitation kanye ne-turbulence quasi-sequential structure ethuthuka ngezikhathi ezithile ku-nozzle, futhi ukuthuthukiswa kwe-cavitation yembobo yenozzle engaphezulu kubi kakhulu kunaleyo yembobo yombhobho ongezansi.