low drag meaning in English
低阻
Examples
- The gear are usually relatively lightweight , and the two main gear can also be easily encased in streamlined fairings to produce low drag in flight
后三点起落架通常重量都比较轻。两支主轮子可以配置整流置用来减小飞行中的阻力。 - As for fixed vehicle spacing , with the increase of vehicle number in platoon , the average drag coefficient can reduce by 20 % ~ 30 % and the vehicle with the lowest drag is about at the center of the platoon
在固定间距下，随着队列中车辆数目的增加，平均阻力系数可降低20 % ~ 30 % ，阻力最低的车大致处于车队的中心位置。 - In the thesis the low drag - low noise optimization of the vehicle main form design is realized , main accomplishments are as follows . researched the knowledge of drag and flow noise , the parameters of the boundary layer are calculated by the hess - smith method and boundary layer momentum integral method . the calculation of the length of transition zone and change in boundary layer displacement thickness between laminar and turbulent states in the transition is improved , then the drag coefficient and self - noise from the transition zone are calculated as the objective functions of the optimization
主要研究内容和成果如下：对航行器绕流流场进行分析，深入研究了阻力和流噪声产生机理，建立了阻力系数和自噪声的评估数值计算模型；采用物面分布源汇法和边界层动量积分法对绕流流场的流体动力参数进行计算，改进了转捩区长度和边界层位移厚度的计算，应用于航行器头部驻点自噪声的计算；最后设计了阻力系数和自噪声数值计算程序模块。