摘要
通过三维数值模拟研究了厢式货车加装导流罩前后的外部流场 ,获得了导流罩的减阻机理。采用RNG kε紊流模型进行计算 ,提高了数值模拟的精度 ,阻力系数的计算采用动量法 ,使计算结果和试验结果更具可比性和科学性。获得的流动图谱为厢式货车外流场的研究提供了可靠材料 ,计算结果为厢式货车减阻节能技术的研究提供了参考。
A flow field around a van-body truck with and without a dome was studied through 3D numerical simulation,and the mechanism of the dome for reducing aerodynamic drag was analyzed. The RNG kε turbulence models were applied in this paper to improve the accuracy of simulations. The momentum method was used to calculate the drag coefficient,which made the calculation results closer to the experimental ones. A collection of illustrative flow plates drawn on the basis of the calculation results provided reliable pictures to study the flow field around the van-body truck,and the calculation results could guide the study of aerodynamic drag reduction and energy-saving for a van-body truck.
出处
《农业机械学报》
EI
CAS
CSCD
北大核心
2004年第3期20-23,共4页
Transactions of the Chinese Society for Agricultural Machinery
