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。
