ứng dụng CFD trong khí động học để xác định lực cản không khí và lực nâng của xe du lịch tải trong

SCIENCETECHNOLOGYl

UfNG DUNG CFD TRONG KHI DONG LI/C HOC DE XAC Om

LI/C CAN KHONG KHI VA LI/C NANG CUA XE DU LKH TAI

TRONG NHE

APPLICATIONS OF CFD IN AERODYNAMICTO DETERMINE AIR DRAG AND LIFT OF LIGHT CARS

Le Hong Quan, Nguyen Anh Ngoc

Tdm tit

Bai bao Sli'dung cac cdsdiy thuyet cda khi'dong life hoc nham du'a ra nhung de xuat tot nhat ve hinh dang

khidgng hoc ci^a xe tac dgng tdi h§ sd luc c^n va luc nang than xe nhcf vao iing dung may tinh trang dong

lire hoc chat ldng thong qua phan mem Ansys Fluent 14.0. flieu nay vo ciing hQu ich tmng cac nghien ciiti

v^ sau nay v6i muc dich la gi^m thieu luc can chuyen dgng cung nhif luc nang trong mot so dieu kien ve

dudng x^ hay ngifcii 1^1. Ba mo hinh tiian xe don gian vdi tam chan trudc, sau va khong cd tam chan duoc

thiet kl'v^ duoc dat ben trong ong khi dong phu hcTp de phan tich nhifng anh hucmg cua lu'c can khong kht

t^c dong tdi xe tSI trong nhe tmng cac trudng hop chuyen dpng khac nhau.

Cie ke't qui du'Oc dinh gia mot each ky luflng nham de ra nhifng hudng nghien cilu xa han lien quan tdi cac

van de cap thiet hi§n nay nhif ti^t kiem nang luong, can bang than xe, dieu khien trtrgt banh, an toan...

Tirkh6a: Khi dong lu'c hocxe hoi, ANSVSICEM CFD, xe tai trong nhe, he so can khong khiva luc nang

Abstract

This paper utilizes aerodynamic theory to indicate the best shape of car's body in drag force and lift force

coefficients relying on simulation of computational fluid dynamics (CFD) by Ansys Fluent 14.0. That is very

meaningful in the future studies which purposes are deceasing in drag force and increasing in lift force in

vary conditions of ether ground environment or driver Three simple models with front paneL rear panel

and v^ithout panel were created and put inside the appmpriated air tunnel to analyze the affects of air

force into light car's body in moving conditions.

Results are evaluated carefully to expose new further research trends that relate on the saving energy,

vehicle stability, friction contml, car safety and etc

Keywords: Vehicleaerodynamic, ANSYS ICEM CFD, light car, drag and lift coefficient

TS. Li Hong QuSn, ThS. IfguySn Anh Ngoc

Khoa CAng ngh^ 0 to, Tnidng fiai hoc Cong nghiep Ha Noi

Emaltquan vsae@haiii edu.vn

1. Gidl THI$U CHUNG

Trong vai chuc nam gan day khi

nginh cong nghiep 6 to phat tnen

manh me, khi dpng life hpc than xe da

duoc nghien cCtu va phat trien nhSm

muc dich nang cao tmh chat dong lac

hpc cua cac loai xe chay tren mat dat.

Ngay nhan bai: 14/6/2014

Ngaydiap nhan dang: 20/8/2014

Tinh chat dong luc hoc phu thupc rat

nhieu vao hinh dang cua than xe, nhan

to chiu anh hudng chinh cua dong

khong khi bao quanh gay ra luc can

chuyen dong cung nhu lu'c nang va mo

men quay xe quanh true thing difng.

Do la nhQng I Uc rat quan trong tac dpng

CACOjNH NGHIA VA CHU THICH

CFD Computational Fluid Dynamics

ECUoA Elearonic Control Unit of

Aerodynamics

ICEM Integrated Computer-aided

Engmeenng and Manufacturing

R&D Research and Develop

A, A Dien tich can chinh dien [m^]

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ien khun g vo xe khi chuye n dong , dac

biet doi vdl nhCtng xe co tai trpn g nhe,

chiing tac dong trUc tiep den he thong

phanh, lai, treo va he thong truyen luc

cua xe. Do do, vdi nhQng hinh dang khi

dong hoc khac nhau cua vo xe se dem

lai nhQng ket qua khac nhau, dieu dd

vd cung hQu ich cho cac nha nghien

cQu va phat tnen (R&D) khdng nhQng

trong nghien cQu ma trong ca sin xuat

nhSm dat dJoc nhdng thanh tifu dot

pha trong Unh vQc xe hoi.

So 23.2014 - Tap dii KHOA HOC & CONG NGH£ 4