查询词典 viscous drag

The complete coupling between the system rigid and flexible degrees of freedom is allowed since the start of the formulation. The Hamilton's principle is utilized in deriving the equations of motion. Both viscous damping and air drag force have been introduced into this model.

该模型考虑了轴承摩擦阻尼和柔性梁结构阻尼以及空气产生的风阻，并采用一致的方法将阻尼和末端质量的影响引入到动力学方程中。

Both viscous damping and air drag force must be introduced into the dynamic models. The experiment is carried out in the single-axis air-bearing test bed according to the experiment scheme in chapter 3. The results demonstrate the validity of the developed model, while the conventional zero-order approximate approach could lead to bad results for some high speed cases.

结果表明了传统零次近似方法在某些条件下已不能正确描述柔性体的刚柔耦合动力学性质，而一次近似的刚柔耦合动力学模型得到的结果与实验相符，从而证实了一次近似耦合模型的正确性和可靠性。

But it increases the viscous forebody drag including the skin friction drag and shock wave drag.

但却增大了包含摩擦阻力和激波阻力的粘性前部阻力。

Based on Prandtl's momentum transportation, this paper calculates in detail the physical quantities such as eddy viscosities, and ratio of eddy viscosity to motion viscosity, total stresses with respect to relative position in three regions of viscous sub-layer, buffer layer, and main turbulent stream for non-Newtonian fluid flowing turbulently in ducts, which according to Karman's three layer models and measurement of fluid parameters in evaluation apparatus, discusses the influence of polymer drag reduction on flowing properties of non-Newton fluid, analyzes quantitatively principle of turbulent reduction phenomenon and condition of increasing reduction rate.

摘要以普兰德动量传递理论为基础，按照卡门的三层模型，通过室内模拟环道用0号柴油及加入减阻剂在圆管内的流动参数的测定，计算了非牛顿型流体管内湍流边界层的层流内层、过渡层、湍流中心的涡流粘度，涡流粘度与运动粘度比、总应力随相对位置的变化等定量参数，探讨了高分子减阻剂对非牛顿流体流动特性的影响，对湍流减阻现象的机理与增大减阻率的条件进行了定量分析。

Considered the viscous drag, inert force and form effects imposed by the porous solid matrix to the flow, a turbulent combustion model based on fundamental equations of combustion in porous media was developed.

考虑了多孔介质的粘性力、惯性力及形状效应，以多孔介质中燃烧的基本方程为基础，推导出了多孔介质中的湍流燃烧模型。

It showed that the flow regime and the forces were closely related to each other.Calculation indicated that the interfacial tension force, static pressure force, viscous drag force and dynamic lift force were the main forces acting on the droplets. The formation process of the droplet was studied.

在一定条件下计算了液滴所受的力，结果表明，表面张力引起的力、液滴内外静压差产生的力、平行于膜表面的流动曳力和运动浮力是主要的力；在此基础上，探讨了液滴的形成过程。

For the three kinds of abnormal-shaped catalyst particles used,i.e.,ring,wheel shape and honeycomb shape,difference of 2.03 times was found in the pressure drop due to viscous resistance and form drag,and up to 2.7 times due to inertial resistance.

本文所选用的三种异形催化剂的颗粒形状可使粘性力引起的床层压降相差约2.03倍，使惯性力引起的床层压降相差约2.7倍。

But this ideal nozzle is extremely long and the high viscous drag and nozzle weight that result are unacceptable.

但这个理想的喷嘴是极其漫长和高粘性阻力和喷嘴的重量而导致的是不可接受的。

In order to improve the accuracy of the existing transformation ratio model of the hydraulic transformer, a mathematical model is established by introducing the friction coefficient, the viscous drag friction coefficient and the laminar leakage coefficient.

为解决已有的液压变压器变压比模型与实际结果偏差较大的问题，通过对实际工作过程中不应忽略的摩擦与泄漏损失进行研究，引入机械摩擦损失系数、黏性摩擦损失系数和层流泄漏系数，建立了液压变压器变压比模型。

Finally, the comparison of the flow fields of viscous liquid sloshing in a rectangle tank with a baffle and those without baffle emulated by ALE finite element method show that one important form of the "drag" that the baffle applying to the liquid is vortex.

同时， 通过ALE有限元数值仿真，对储箱内无隔板和有隔板情况下的黏性流体晃动做了比较，初步推定隔板对液体晃动的''滞阻''的一个重要表现形式为涡耗散。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。