Flow resistance characteristics analysis and structure optimization of braking pipeline based on FLUENT

WANG Dao-bin1， ZHAO Wen-li2
（1. SAIC-GM-Wuling Automobile Co. Ltd.， Liuzhou 545007， China；
2. School of Mechanical and Electronic Engineering， Wuhan University of Technology， Wuhan 430070， China）

Abstract： Aiming at the problem of production tempo which is affected by the compact filling process when certain vehicle is being charged with braking fluid in the production line，the technology of FLUENT was investigated in the analysis of the flow field of hard pipes of four way-left front wheels and four way-right front wheel. After the analysis of numerical simulation and simulation analysis，the relationship between elbow coefficient of local resistance and respective influencing factors was established. A method was presented to optimization of pipe structure parameters. The brake fluid charging amount，pipeline length and flow resistance were evaluated with no effect of the braking pipeline layout，and the filling verification experiments after structure optimization were tested. The research results indicate that，total length of both hard pipes of four way-left front wheel and four way-right front wheel is been shortened 153.5 mm and flow resistance of each hard pipe is been reduced about 10%，which improves flow characteristics of brake fluid in hard pipes and shortens filling time，total cavity volume of both hard pipes is reduced 1 338 mm3，which saves brake fluid charging amount and hard pipe materials of each vehicle accordingly，thus reduces production cost.
Key words： braking fluid charging； FLUENT； flow resistance characteristics of braking pipeline； optimization of pipe sturcture parameters