By employing computational fluid dynamics software CFX to numerically simulate the process of a car trailing a container truck, a relative aerodynamic drag coefficient curve of the car in the process of trailing is obtained, and a study on the external flow field of the car is carried out.
利用计算流体力学(CFD)软件CFX对轿车尾随集装箱车的过程进行了数值模拟,得到在尾随过程中轿车的气动阻力系数相对变化曲线图,并对尾随时轿车外流场进行分析与研究,仿真分析表明:轿车的气动阻力系数随两车距离减小而减小,当车间距为2倍的轿车车长时达到最小,车间距再减小时气动阻力系数又增大。
When the leading bubble was steady,the relationship between instantaneous velocity,shape,acceleration of the trailing bubble and viscosity、 bubbles distance、bubble length was obtained.
在领先气泡达到充分发展后,得出了尾随气泡的瞬时速度、形状和加速度与液体黏度、气泡间隔距离和气泡长度的关系。
The complete nucleotide sequence of the 5′ trailer in WRSV genomic RNA was determined by deoxynucleotide sequencing of cloned cDNA derived from the anchored PCR products.
根据已知的弹状病毒聚合酶L蛋白分子中一段高保守的8个氨基酸顺序EGLRQKGW,合成简并的24核苷酸引物,用锚定PCR方法从小麦丛矮病毒(WRSV)基因组中扩增出包含全长5′尾随(trailer)区和部分L蛋白基因的DNA片段,并克隆到pUC19T载体上,经测序,获得全长的WRSV基因组5′尾随区顺序。
Computational Simulation of External Flow Field of Truck in Tandem and Research on Its Fuel Economy;
货车尾随行驶外流场计算模拟及其燃油经济性分析
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