基于Fluent与GT-SUITE联合仿真的FSC赛车进气系统设计与优化  

Design and optimization of the FSC racing car intake system based on joint simulation using Fluent and GT-SUITE

作　　者：周卫平 李常平 ZHOU Weiping;LI Changping(School of MechanicalEngineering,Hunan University of Science and Technology,Xiangtan 411100,Hunan,China)

机构地区：[1]湖南科技大学机电工程学院,湖南湘潭411100

出　　处：《农业装备与车辆工程》2024年第10期48-52,共5页Agricultural Equipment & Vehicle Engineering

摘　　要：针对2023年中国大学生方程式汽车大赛赛规中加装限流阀以限制发动机功率的要求,通过Fluent与GT-SUITE的联合仿真,对进气系统进行设计与优化,从而减小进气系统的阻力损失,提升发动机的动力性。利用Fluent对限流阀进行计算流体力学(CFD)仿真分析,得到限流阀最优结构参数为过渡圆角r=40 mm、渐缩角α=14°、渐扩角β=6°。采用GT-SUITE建立发动机数值仿真模型,分析进气系统其他结构参数对发动机充量系数和扭矩的影响,进行合理的结构优化,得到进气管长度l=145 mm、稳压腔容积V=3.5 L。仿真结果表明:限流阀的阻力损失减小了2.48%,在低、中转速区间,发动机的充量系数和转矩得到了提升,其中在5000 r/min时充量系数增大了2.61%。Aiming at the restriction on engine power imposed by the Limiting valve mandated in the regulations of the 2023 Formula Student China Competition,a joint simulation using Fluent and GT-SUITE was conducted to design and optimize the intake system in order to reduce intake system resistance losses and enhance engine power performance.Fluent was utilized to perform Computational Fluid Dynamics(CFD)analysis on the Limiting valve,which resulted in optimal structural parameters:transition radius r=40 mm,contraction angleα=14,and expansion angleβ=6°.An engine numerical simulation model was established using GT-SUITE to analyze the impact of other intake system structural parameters on the engine′s charge coefficient and torque.Through rational structural optimization,the optimized values were found to be intake pipe length l=145 mm and the volume of the steady-state pressure chamber V=3.5 L.The simulation results indicated that the resistance loss of the Limiting valve decreased by 2.48%,leading to improved charge coefficient and torque across the low to medium speed range.Specifically,at 5000 r∕min,the charge coefficient increased by 2.61%.

关 键 词：中国大学生方程式 进气系统 限流阀 Fluent与GT-SUITE联合仿真 结构优化 

分 类 号：U464.134.4[机械工程—车辆工程] U469.696[交通运输工程—载运工具运用工程]