Question

化工专业英语翻译二

3.2. Segregation index
During the Reynolds number range investigated herein
(66–1,060), the 7uid 7ow at No. 0 should be in laminar
7ow regime. Ata Reynolds number of 66, corresponding
to low-Reynolds number, purely shear 7ow,
the segregation index is approximately 0.7, indicating a
rather poor micromixed environment. Further increasing
the Reynolds number reduces the segregation index substantially.
For example, Xs = 0:25; 0:17; 0:13, and 0.09
for ReEM=159; 265; 477, and 663, respectively. Notably,
at the high-Reynolds number laminar 7ow in an empty
tube could yield su#cient micromixing. For example, at
ReEM = 1; 060, the segregation index becomes as low as
0.04. Such an observation may be attributed to the interference
of the feeding tip to the 7owing 7uid that generates
local turbulence, which induces uncertainty in the
Xs measurement.
Next consider the static mixer case. At ReEM =66, the
corresponding Xs becomes lower than that for an empty
tube: Xs =0:48; 0:47; 0:52 and 0.57 atposit ion Nos. 1–4.
The presence of static mixer could thereby markedly enhance
the micromixing e#ciency at the low-Reynolds
number laminar 7ow regime. Notably, the CH+ atposition
0 is di?erent from that for position Nos. 1–4, the
enhancement of micromixing by using static mixer cannot
be directly compared. However, one could still note
that (1) the static mixer has markedly improved the micromixed
environment; (2) the micromixed environment
for the Brst two elements is better than the subsequent
elements of the mixer, as evidence by the lower Xs’s for
the former two elements.
Athigher Reynolds number the Xs decreases accordingly.
For example, at position #2, the Xs =
0:17; 0:08; 0:05; 0:04 and 0.03 at ReEM=159; 265; 477; 663
and 1,060, respectively. Restated, at a Reynolds number
exceeding approximately 200 the segregation index can
reach a low level less than 0.1

Answer 1

3.2. Segregation index
3.2 偏析指数
During the Reynolds number range investigated herein (66–1,060), the 7uid 7ow at No. 0 should be in laminar 7ow regime. At a Reynolds number of 66, corresponding to low-Reynolds number, purely shear 7ow, the segregation index is approximately 0.7, indicating a rather poor micromixed environment. 在研雷诺数范围（66－1060）于这里加以研究的过程中，在0号处的7uid7ow应在层流7ow状况。在雷诺数为66时（这相当于低雷诺数），偏析指数大约为0.7，表明相当差的微流体混合环境。Further increasing the Reynolds number reduces the segregation index substantially. For example, Xs = 0:25; 0:17; 0:13, and 0.09 for ReEM=159; 265; 477, and 663, respectively. 进一步提高雷诺数使偏析指数大大降低。例如，对于ReEM＝159；265；477和663来说，Xs分别等于0：25；0：17；0：13和0.09。Notably, at the high-Reynolds number laminar 7ow in an empty tube could yield su#cient micromixing.尤其是在高雷诺数时，在任何空管内的层流7ow都可能产生足够充分的微流体混合。 For example, at ReEM = 1; 060, the segregation index becomes as low as 0.04. Such an observation may be attributed to the interference of the feeding tip to the 7owing 7uid that generates local turbulence, which induces uncertainty in the Xs measurement. Next consider the static mixer case. At ReEM =66, the corresponding Xs becomes lower than that for an empty tube: Xs =0:48; 0:47; 0:52 and 0.57 at posit ion Nos. 1–4. 例如在ReEM＝1，060时，偏析指数变成低达0.04.这样一个观察结果可归因于进料嘴对7owing7uid的干扰，它产生了局部的湍流，这在Xs测量中引入了不确定性。接下来考虑静态混合器的情况。在ReEM＝66时，相应的Xs变的低于空管的值，在1号到4号位置Xs＝0：48；0：47；0：53和0.57。The presence of static mixer could thereby markedly enhance the micromixing e#ciency at the low-Reynolds number laminar 7ow regime. 静态混合器的存在因此会明显提高地雷诺数层流状况下的微流体混合效率。Notably, the CH+ at position 0 is di?erent from that for position Nos. 1–4, the enhancement of micromixing by using static mixer cannot be directly compared. However, one could still note that (1) the static mixer has markedly improved the micromixed environment; (2) the micromixed environment for the Brst two elements is better than the subsequent elements of the mixer, as evidence by the lower Xs’s for the former two elements. 特别是，在0位置处CH+与1号到4号位置处的不同， 由于采用静态混合器对微流体混合作用的提高不能直接加以比较。可是，人们仍可以注意到，1）静态混合器已明显改善了微流体混合的环境；2）用于Brst两种元素的微流体混合环境优于混合器后续的元素，作为证据，前两种元素的Xs较低。At higher Reynolds number the Xs decreases accordingly. For example, at position #2, the Xs = 0:17; 0:08; 0:05; 0:04 and 0.03 at ReEM=159; 265; 477; 663 and 1,060, respectively. Restated, at a Reynolds number exceeding approximately 200 the segregation index can reach a low level less than 0.1在较高雷诺数时，Xs随之下降。例如在2号位置，在ReEM＝159；265；477；663和1，060时分别为Xs＝0：17；0：08；0：05；0：04和0.03。复述一下，在超过大约200的雷诺数时，偏析指数可以达到小于0.1的低水平。

Answer 2

3.2 。偏析指数
在雷诺数范围调查此处
（ 66-1060 ） ，该7uid 7ow在第0层应在
7ow制度。瓦卡阿塔雷诺数66 ，相应的
低雷诺数，纯剪切7ow ，
偏析指数约为0.7 ，这表明
而穷人micromixed环境。进一步增加
雷诺数降低了隔离指数大幅。
例如， 5,2 = 0时二十五分; 0点17分; 0时13分，和0.09
为ReEM = 159 ; 265 ; 477和663 ，分别为。值得注意的是，
在高雷诺数层7ow空
管可能会产生苏＃系数微观。例如，在
ReEM = 1 ; 060 ，变成了隔离指数低
0.04 。这样的观察可能是由于干扰
小费的喂养的7owing 7uid生成
当地的动荡，这引起的不确定性
5,2测量。
下一步考虑静态混合器案件。在ReEM = 66 ，
相应的5,2成为低于空白
管： 5,2 = 0时48分;零时47分;零点52分和0.57 atposit离子第1-4 。
在场的情况下静态混合器可以从而显着提高
微观é ＃缺陷在低雷诺数
若干层7ow制度。值得注意的是，一架CH + atposition
0是邸？ erent从第1-4的位置，在
加强微观使用静态混合器不能
作直接比较。然而，一个仍然可以说明
（ 1 ）静态混合器已显着改善micromixed
环境; （ 2 ） micromixed环境
为Brst两个要素优于随后
要素的混合器，作为证据的低5,2的为
前两个部分。
Athigher雷诺数的5,2相应减少。
例如，在立场＃ 2 ， 5,2 =
0点17分; ○时08分; ○时○五; 0时04和0.03在ReEM = 159 ; 265 ; 477 ; 663
和1060 ，分别。重，在雷诺数
超过大约200名的隔离指数可
达到较低水平小于0.1