运动粘度

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。

The term viscosimetry, in the past people wrongly kinematic viscosity, relative viscosity and kinematic viscosity, collectively referred to as viscidity to the 1990s, for viscidity a few words on the short form of dynamic viscosity.

粘度一词，过去人们误将动力粘度、相对粘度和运动粘度统称为粘度，到二十世纪九十年代后，对于粘度一说，只指动力粘度的简称。

Viscosity changes with temporature so thetemperature at which the measuremem was made must always bespecked.

运动粘度会随温度变化而变化，因此，在给出运动粘度的数值时，通常必须注明其测试温度。

Most parameters for the mixture antioxidation oil were studied and they were consistent with GB 2536-90, including transparence, smell, density, solidifying point, flash point, viscosity, acids and water-solubility acids;The viscosity of the antioxidation oil at 20℃～90℃was as same as mineral;And the relative permittivity at 30～106Hz was invariable and it was higher than mineral oil so that the electric field of the antioxidation oil paper insulation was more equilibrious.

研究得到了所研制的抗老化变压器油的参数值：透明度、气味、密度、凝点、闪点、运动粘度、酸值及水溶性酸或碱等，均满足变压器油技术标准GB 2536-90的要求；20℃～90℃之间该油运动粘度和矿物油几乎相等；在30～106Hz频率范围内，该油相对介电常数基本维持恒定，且比矿物油相对介电常数略大；其工频击穿电压远高于矿物油。

Its model performance is as follows: Piao fears ㄕ of deputy Po any of several hot spice plants pulling magpie to light?W/40 motion viscosity / 95100 ℃ of ℃ of Mm2 · S-1ASTM D44540 viscosity of motivation of low temperature of ℃ of 175 ASTM D2270-30 of 15.5 viscosity index / cryopump of ℃ of MPa · S 6400 ASTM D5293-35 sends viscosity / ash content of sulfate of MPa · S 28000 ASTM D4684, alkaline value of %1.0 ASTM D874 / flash point of MgKOH · G-110.6 ASTM D2896/℃ 224 ASTM D92 /℃- card of carapace of 36 ASTM D97 rolls out Rotella T5W/40 to synthesize engine oil of derv of heavy burden carry on one's shoulder completely

其典型性能如下：项目指标方法粘度等级5W/40运动粘度/mm2·s-1ASTM D44540℃95100℃15.5粘度指数175 ASTM D2270-30℃低温动力粘度/mPa·s 6400 ASTM D5293-35℃低温泵送粘度/mPa·s 28000 ASTM D4684硫酸盐灰分，%1.0 ASTM D874碱值/mgKOH·g-110.6 ASTM D2896闪点/℃224 ASTM D92倾点/℃-36 ASTM D97壳牌推出Rotella T5W/40全合成重负荷柴油机油

Viscosity changes with temporature so the temperature at which the measuremem was made must always be specked.

运动粘度会随变化而变化，因此，在给出运动粘度的数值时，通常必须注明其测试。

Viscosity changes with temporature so the temperature at which the measuremem was made must always be specked.

运动粘度会随温度变化而变化，因此，在给出运动粘度的数值时，通常必须注明其测试温度。

The kinematic viscosity of oil will change greatly with variation of temperature, the higher using temperature the lower kinematic viscosity.

而且光亮淬火油的运动粘度随使用温度的变化而变化，温度越高运动粘度值越低，越有利于其流动。

The model KV-6 is a Constant Temperature Bath designed for measurement of kinematic viscosity of liquid petroleum products.

KV-6 多路计时器是运动粘度测试恒温槽是配合液体石油产品运动粘度的测试方法（动态粘度所使用的专用恒温浴槽，能够提供正确的测试温度和±0.01℃高精度恒温环境。

The kinematic viscosity is the product of the kinematic viscosity of the liquid measured at a certain constant temperature and its density measured at the same temperature.

运动粘度为液体在某一恒定温度下测得的运动粘度与同温度下该液体的的密度之积。

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％。