2488244 Diesel Roj Injector rau Scania DC09 / DC13 / DC16 Cav

Dynamic cavitation nyob rau hauv lub siab ua tau zoo diesel injector - ib qho kev sim thiab CFD kev tshawb nrhiav (part 4)

Hauv cov ntsiab lus: 

Kev ntsuas kub ceev ntawm cavitation nyob rau hauv ib qho kev tswj lub qhov ncauj qhia tau hais tias cov nyhuv hydraulic tsis pom nyob rau hauv cov kev tshawb fawb yav dhau los. Loj void cavitation tau tsim nyob rau ntawm phab ntsa orifice thiab thaum lub conical seem tau mus txog, backfilling tshwm sim nyob rau hauv lub orifice. Thaum lub backfilling mus txog qhov chaw nkag, muaj qhov hloov pauv hloov pauv, qhov khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob khoob.

Advanced turbulence modeling nyob rau hauv lub CFD simulations ua rau cov kev tshwm sim uas muaj qhov tseeb ntau dua li cov qauv qauv thaum piv nrog cov txiaj ntsig kev sim. 

Lub CFD tau sib phim rau qhov sib tw loj void cavitation raws lub qhov ncauj thiab qhov kev tshwm sim rov qab. 

Qhov zaus ntawm tus cwj pwm no ntawm CFD cov txiaj ntsig kuj pom zoo nrog qhov kev sim. 

CFD tau qhia tias tus nqi ntws kuj tseem muaj zog, txuas nrog tus cwj pwm cavitation tau piav qhia saum toj no. Qhov tseeb tias qhov nruab nrab Cd hauv CFD pom zoo nrog qhov ntsuas hauv qhov kev sim ua rau muaj kev ntseeg siab tias CFD flow rate pulsation yog qhov tseeb. 

Siv LSMs tau ua kom muaj kev txhim kho ntawm LES CFD qauv hauv lub sijhawm tswj tau. Qhov no tau txuag lub sijhawm ntau hauv kev tsim cov qauv rau cov khoom siv tiag tiag. 

Nyob rau hauv cov ntaub ntawv ntawm lub injector tiag tiag, zaus ntawm lub pulsing cavitation yog siab dhau los cuam tshuam lub cav kev ua tau zoo. Kev paub txog qhov tshwm sim uas tau muab los ntawm txoj haujlwm no yuav ua rau muaj kev cuam tshuam tsis zoo uas yuav zam tau rau qib tsim qauv yav tom ntej.

Cov ntaub ntawv
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