基于FLUENT的制动管路流阻特性分析与结构优化

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

针对某车型在生产线上加注制动液时因加注时间紧凑而影响生产节拍等问题,将FLUENT技术应用到四通-左前轮和四通-右前轮硬管的内流场分析中。开展了数值模拟和仿真分析,建立了弯头局部阻力系数与各影响因素之间的关系,提出了优化改进弯管结构参数的方法;在不影响制动管路布置的基础上对制动液加注量、管长和流阻进行了评价,并进行了管路优化后的加注验证试验。研究结果表明,经结构优化后,该车型四通-左前轮硬管和四通-右前轮硬管总长缩短了153.5 mm,同时两根硬管的流阻均大约减小了10%,制动液在硬管内的流动特性得到了改善,加注时间得以缩短;四通-左前轮硬管和四通-右前轮硬管空腔体积之和减少了1 338 mm3,每台车的制动液加注量及硬管原材料的消耗也相应减少,从而降低了生产成本。

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.