道路清扫车外文翻译.docx

卩付录 U; NUmeriCaIStUdy On PartiCIe ； headfOrastreetvacuumswee ； BofuWu*, JinlaiMen, JieChe ; SChOOIOfMeChaniCaIEngIiS ; ABSTRAC; T ThePUrPOSeOfthiSPaPeriSt ； KeyWOrdS:PiCkUPheacl;Part ； 1. IntrodUCtiOn ； CU 附录U NUmeriCaI StUdy Orl PartiCIe removal PerfOrmanCe Of PiCkUP head for a Street VaCUUm SWeePer BOfU WU *, JinIai Men, Jie Chen SChOOI Of MeChaniCal EngIiSh Shanghai JiaO TOngUniVerSity ， Shanghai, 200240, China ABSTRACT The PUrPOSe Of this PaPer is to investigate the PartiCle removal PerfOrmanCe Of PiCkUP head for a Street VaCImIn SWeePer numerically? An integrated 3D numerical model was COnStrUCteel based On PartiCIe SUCtiOn PrOCeSS in COmPUtatiOnal fluid dynamics (CFD) SOftWare? The airflow through the PiCkUP head WaS treated as a COntinuum, WhiIe PartiCIeS Were modeled as dispersed PhaSe? The ReynOIdS StreSS model (RSM) and discrete PartiCIe model (DPM) Were ChOSen in Order to PrediCt the air and PartiCleS flow accurately. The numerical SimUIatiOn results ShOW that the SWeePer-traveling SPeed and the PreSSUre drop across the PiCkUP head have great effects On the PartiCIe removal PerfOrmanCe? The removal efficiency Of PartiCIeS increases With the IOWer SWeePer-traveling SPeed Or the higher PreSSUre drop, and SmalI SiZe PartiCIeS have higher grade efficiency than that Of Iarge SiZe PartiCIeS Under the Same OPerating COnditiOnS? Moreover, the removal mass flow rate Of PartiCIeS increases With the higher SWeePer-traveling SPeed? Therefore, a trade-off ShOUld be COnSidered among high removal efficiency, IOW energy COnSUmPtion, and high removal mass flow rate. ThrOUgh the numerical simulation, the effectiveness Of Street VaCUUnI SWeePer for removing PartiCIeS from road SUrfaCe is evaluated, and an OPtimaI OPerating COnditiOn is Obtained? Besides, more information is generated to better UnderStand the PartiCle SUCtiOn PrOCeSS Of the PiCkUP head? KeyWOrdS: PiCkUP head; PartiCle removal PerfOrmanCe ;CFD ;SWeePer-traveling SPeed PreSSUre drop 1. IntrOdUCtion Currently,