Nozzle Yeniyeni Yatsopano Yojambulira Sitima Yapamtunda ya L246pbc ya Fuel Injector

Kafukufuku pa Chikoka chaNozzle ya jekeseni Kusuntha kwa Injector ya Injini ya Dizilo pa Makhalidwe a Jakisoni wa Bowo Lililonse (gawo 2)

Zofufuza zazikulu za pepalali ndi izi:

(1) Kutengera lamulo la kusungirako mphamvu ndi chiphunzitso cha Bernoulli, njira yoyesera ya mawonekedwe osakhalitsa a jekeseni wamafuta pabowo lililonse kutengera mfundo yoyezetsa kuthamanga kwa kutsitsi idapangidwa ndikumangidwa. Makina oyesera amatha kutolera kuchuluka kwa jakisoni wamafuta pabowo lililonse la jekeseni wa mabowo angapo nthawi imodzi, ndikuzindikira kusonkhanitsa kwanthawi yayitali ya jakisoni wamafuta. Kulondola ndi kudalirika kwa dongosolo loyesera kumawunikidwa.

(2) Kutengera tsamba lotseguka la C++ laibulale ya OpenFOAM? nsanja, pamaziko a rhoCentralFoam solver kwa compressible transonic otaya, kachidindo kuthetsa compressible mpweya-zamadzimadzi magawo awiri kuyenda mu nozzle anapangidwa ndi kuikidwa. The solver amagwiritsa homogeneous otaya chitsanzo kuthetsa multiphase mafuta otaya mu nozzle ndi amathetsa magawo awiri gawo kusintha kudzera positive pressure equation of state. Popeza muyezo wa RNGk-ε chipwirikiti chitsanzo si olondola mokwanira kuthetsa compressible otaya, makamaka cavitation chodabwitsa m'dera otsika kuthamanga, chitsanzo chipwirikiti ndi kusinthidwa poyambitsa kachulukidwe ntchito yokhudzana ndi cavitation boma m'malo kachulukidwe nthawi zonse. Kuphatikiza apo, pothetsa ma equation a Euler amadzimadzi oponderezedwa, nthawi zambiri pamakhala njira zosiyanitsira, zomwe ndi vuto la Riemann, chifukwa champhamvu yamasamu ya hyperbolic ya ma equation.

Mu pepalali, pafupifupi Riemann solver amagwiritsidwa ntchito pokonza kuchuluka kwa manambala a mesh kuti agwire yankho losapitilira, ndiye kuti, kugwedezeka kwa mafunde amadzimadzi. Chitsanzocho chimagwiritsidwa ntchito kusanthula mphamvu yaNozzle ya jekeseni kuyenda pa patsekeke otaya mkati nozzle wa awiri dzenje jekeseni, ndi anakhazikitsa chitsanzo CFD zimatsimikiziridwa pogwiritsa ntchito kuyeza mafuta jekeseni malamulo a dzenje lililonse. The kayeseleledwe zotsatira zimasonyeza kuti chitsanzo akhoza molondola analanda cavitation ndi chipwirikiti quasi-sequential dongosolo akufotokozera nthawi mu nozzle, ndi cavitation chitukuko cha chapamwamba dzenje nozzle ndi ovuta kwambiri kuposa dzenje m'munsi nozzle.