摘要
提出了一种适用于工程设计的活塞风简化计算方法.该方法从运动列车与隧道气流的功能转换出发,以列车作用段作为活塞风压源,利用流体力学的基本原理、基本方程和湍流半经验理论,提出了活塞风压力和速度的计算方法.以现场实车的隧道空气动力学试验资料为参照进行对比,活塞风速度的计算值与实测符合度较好,这表明以不可压缩定常流动为计算模型的活塞风简化计算方法可为活塞风的工程实际应用提供理论基础.
A simplified calculation method for train piston wind is put forward which is suitable for engineering design.From the point of functional transformation between the moving train and tunnel airflow,and according to the principles and basic equations of fluid mechanics and the tur-bulent half-experience theory,the calculation method of piston wind press and velocity is put for-ward by taking the train action segments as the piston wind pressure source.The calculated piston wind velocity accords with the measured result on site by making a comparison with tunnel aero-dynamic test data of real vehicles.This indicates the simplified method whose calculation model is the steady flow of incompressible fluid can provide theoretical basis for engineering application of the piston wind.
出处
《兰州交通大学学报》
CAS
2014年第4期179-182,共4页
Journal of Lanzhou Jiaotong University
关键词
铁路隧道
活塞风
计算方法
railway tunnel
piston wind
calculation method
