flow resistance
- flow resistance的基本解释
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流阻, 抗流变, 粘性
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The characteristic and difference of flow in porous media between the pseudo-plastic fluids and the expansile fluids was described in detail. The experimental pressure drop measurements were made in a packed bed under a variety of conditions, and the variation of the friction factor with the Reynolds number was obtained. Corresponding to the flow resistance in a nonporous channel, the flow resistance in porous media can be divided into Darcy resistance and Forchheimer resistance as well. The experiment data was divided into Darcy regime, transitional regime and Forchheimer regime in accordance with the Reynolds number.
实验测定了不同浓度聚丙烯酰胺溶液在五组填充多孔介质中流动的压降-流量关系,绘出了阻力因子随Reynolds数变化的关系曲线;按照将流动阻力分为层流粘性阻力和惯性阻力的观点,将多孔介质流动阻力分为Darcy阻力和Forchheimer流动阻力;参考有关文献,将实验区域按Reynolds数范围分为Darcy流动、过渡流动和Forchheimer流动。
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Kempers' study , the more layers the mesh screen type had, its resistance against gravity was higher, but its heat resistance and flow resistance were comparatively augmented. As mentioned in the preceding paragraph, it is extremely difficult for a single micro structure based on any of the three types to possess both low flow resistance and strong capillary force. Faced with this fact, the researchers have tried to mix the three micro structures in Table 2 into as many combinations as possible so that a composite micro structure with low flow resistance and great capillary force may be fabricated. After a thorough analysis, the groove combined with sintered metal or mesh screen has been found to be a better alternative. However, the groove combined with sintered metal will raise the flow resistance of the channel, and the aluminum substrate employed in this research cannot be sintered into a micro structure. As a result, the groove combined with mesh screen is finally chosen as the composite structure to enhance its capillary force and at the same time maintain its high permeability. In this way, the heat pipe will not fail due to the working angles.
Kempers 的研究当中提到,当网格结构越多层时,其对抗重力的能力也越强,但相对的其热阻以及流阻也越高,就如同前段所述,我们很难在单一结构当中找出一流阻低且毛细力之微结构;因此本研究便以表2中之三种微结构进行组合,找出一低流阻且毛细力强之复合式结构,经分析发现,沟槽搭配烧结以及沟槽搭配网格为较佳之组合方式,但由于烧结搭沟槽构造将会提高流道之流阻,且本研究使用铝做为基材,并无法使用烧结最为其微结构,故将采用网格搭配沟槽之复合式结构提高结构的毛细力,并维持沟槽结构的高渗透性,解决因角度造成热管失效的问题。
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The flow resistance of Ice slurry increases if the pipes obliquity increases. That means the ice slurry that in the level pipe has the largest flow resistance, the reason is: the gravitation make the flow became more and more foul-up, accordingly, lead to the increase of flow resistance. Sixthly, introduced all of the preparative tasks before we began the experiment, because we met many problems during the test, we had our own methods which could solve these problems. In this paper, problems and these methods were introduced.
随着管道倾角的增大,二元冰的摩擦阻力减小,也就是说相同条件下水平管道内的摩阻最大,这是因为重力的影响导致管道内二元冰和乙二醇分层现象更加明显,从而导致紊流程度增大,最终使得摩阻增大;第六,对二元冰蓄冷空调系统运行前的准备工作进行了介绍,由于在试验过程我们遇到了很多问题,针对这些问题,我们有自己的方法和解决办法,本文介绍了这些问题和相应的解决办法。
- 更多网络解释与flow resistance相关的网络解释 [注:此内容来源于网络,仅供参考]
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frictional resistance:摩擦阻抗
frictional layer 摩擦層 | frictional resistance 摩擦阻抗 | frictional secondary flow 摩擦副流
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Flow resistance and head loss:水流阻力和能头损失
水流流态 State of flow | 水流阻力和能头损失 Flow resistance and head loss | 水轮泵站 turbine-pump station
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line of least resistance:最小抵抗线
line of flow 吝 | line of least resistance 最小抵抗线 | line of magnetization 磁化曲线