查询词典 turbulent

By using the method of direct numerical simulation, the coherent structures in the wall region of a turbulent boundary layer with either steady or changing pressure gradients were studied.

采用共振三波的一个周期作为湍流边界层近壁区相干结构的初值，用直接数值模拟方法对有压力梯度，包括定常压力梯度和变压力梯度作用下相干结构的演化进行了研究，得出其各种特性的变化与实验观测到的结果一致。

He had the manners of a disobliging steamroller (most steamrollers are abjectly obliging and conciliatory); and he was rather less particular about his dress than a scarecrow: in fact he was once arrested as a tramp because the police refused to believe that such a tatterdemalion could be a famous composer, much less a temple of the most turbulent spirit that ever found expression in pure sound.

他有一架不听话的蒸汽轧路机的风度（大多数轧路机还恭顺地听使唤和不那么调皮）；他穿衣服之不讲究甚于田间的稻草人：事实上有一次他竟被当做流浪汉给抓了起来，因为警察不肯相信穿得这样破破烂烂的人竟会是一位大作曲家，更不能相信这副躯体竟能容得下纯音响世界最奔腾澎湃的灵魂。

Based on the analysis of the fluid flow in the downcomer of an airlift internal loop bioreactor , a turbulent two-fluid model for airlift internal loop was proposed.

在对气升式内环流生物反应器内部流动分析基础上，全面考虑反应器下降管中气泡的并聚破碎、气液两相间相互作用和滑移等，建立了能描述反应器下降管中复杂流动的CFD数学模型。

The maximum tangential velocity decreases downwardly and shifts gradually towards the center wall along the axial direction, which are mainly caused by the effects of the friction loss along the wall and the turbulent energy dissipation.

轴向速度沿径向呈明显的线性分布，下行轴向速度沿提升管外壁向封闭罩内壁的径向方向逐渐增大。

When the dragline is caught in a turbulent breeze, it becomes highly contorted, catching air like an open parachute and sending the spider on an unknown journey.

当遇到不稳定的气流时，蜘蛛网就被剧烈扭曲，象空中张开的降落伞一样，将蜘蛛送上一段未知旅途。

It has shown that the drift velocity is relatively more intense near the wall which greatly affects the turbulent suspension and transportation diffusion of the sediment.

通过数值模拟和理论分析说明了相间漂移速度在靠近床面的区域内相对较为显著，这对于泥沙的湍流悬浮和输移扩散有较大的影响。

The self-excited oscillation imposes a profound influence on turbulent mixing process: i.e., it not only enhances large-scale engulfment or entrainment but also simultaneously decreases the molecular mixing rate.

射流振荡对近场和远场的湍流混合过程都具有重要影响。自激振荡射流能增强宏观上的大尺度搅动，但同时却减弱了微观上的小尺度混合。

By using the CFD software FLUENT, the inner-flow field of centrifugal fans with ruled-surface impeller versus with enveloping surface impeller has been simulated. The static pressure distribution, the dynamic pressure distribution, the total pressure distribution, the turbulent intensity and the speed vector of the two kinds of centrifugal fans are then analyzed and compared. From the calculating results, we found that the pressure distribution, the speed vector and other parameters of the two kinds of centrifugal fans are basically same. This implies that the tool-path generating arithmetic for the machining of the impeller can meet the aerodynamic requirements of the centrifugal fan. Furthermore the method can provide proof for designing department to establish sound manufacturing tolerance for impeller.

最后采用CFD软件FLUENT，利用标准k-ε湍流模型，采用分离隐式求解器，分别对直纹面叶轮离心通风机和包络面叶轮离心通风机整体风机内部三维流场和单个通道流场进行了数值模拟计算，在计算结果的后处理中，对相同坐标值处的静压力、动压力、湍流强度和速度矢量等参数进行了分析与比较，结果表明：在相同的计算参数条件下所得到直纹面叶轮离心通风机和包络面叶轮离心通风机内部流场差别不大，从而揭示所采用的叶轮数控加工的刀位规划方法的规划误差对流体机械动力性能的影响不大，这也为设计部门制定合理的叶轮加工公差提供了依据。

Euripus:a sea channel characterized by turbulent and unpredictable currents.

"急流水道：潮流或海流急剧进退，无法预知的水道。"

Its turbulent history has not managed to stifle people's indomitable spirit whose passion, charm and vibrancy have forged this great city, a place in which the fire of Evita's sool and the allure of the tango endure.

布宜诺斯艾利斯那段动荡的历史，并没能抑制住不宜诺斯艾利斯人民不屈不挠的精神，他们的激情、魅力和活力铸就了这座伟大的城市。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐