之流

This study presents the investigating of microchannels flow. It is divided into two parts, the flow characteristics of micro venturi and the performance of straight-walled and curved-walled micro nozzle/diffuser respectively. The experimental results are also compared with the simulation results whereby we can observe the flow field in micro venturi and discuss the bounder effect of micro nozzle/diffuser.

本文主要是针对微喷嘴的空气流场进行研究与探讨，研究分为两部分进行，分别是探讨微文氏管的流力特性及曲面微喷嘴边界对流力效能的影响，并将实验结果与CFD软体的分析结果相互比较，藉以观察微文氏管内之流场分布并探讨微喷嘴较佳之流力性能。

For solving this problem in analytic way, we mark some assumptions for simplification: Assuming this is incompressible and irrotational flow in three-dimensional flow field.

如以无旋流与密度为定值考虑之，可获得不同沿岸斜面形状之流场解析解。

The main purpose of this study is to find the solution of the two- dimension irrotational flow and supercritical flow in channel contractions. For irrotational flow, the potential function is used to compute the water depth and velocity distributions in constriction channel.

本文的主要目的为分析二维渠道中非旋流及超临界流之流况，针对二维束缩段非旋流时，利用等势能函数来计算矩形渠道收缩段之水深及流速分布。

Yet it turned out that they----the Haldemans, the Ehrlichmans, those caught up in the torrent of Watergate----to go, and he was to go on to even greater heights from his start in the basement of the West wing of the White House, s assistant to the President for National Security Affairs, he would vault to the seventh floor of the State Department as Secretary of State, a position once held by Thomas Jefferson, Daniel Webster, and John Foster Dulles.

可是结果呢？倒是他们----霍尔德曼之流，艾利希曼之流，那些陷于水门急流的人物----卷起了铺盖，而他却反而青云直上，从白宫西翼地层的总统国家安全事务助理办公室，一跃而登上国务院大楼的七层高阁，当了国务卿，跻身于杰弗逊、韦伯斯特和杜勒斯之列。

According to their narratives, the events were entirely due to the wills of Napoleons, of Alexanders, or, generally speaking, of those persons who form the subject of historical memoirs.

按照他们对历史的阐释，历史事件的发生完全是由拿破仑之流、亚历山大之流的意志所决定的。

Next the discussion in this study, about an ellipse with an angle of attack and two circular cylinders with different diameters in the flow, the aim of this study is investigated for the ability of the present numerical method by solving the suppression of the vortex shedding flow behind the two-cylinder system which was kind of difficult to reach by a Cartesian grid method. In this study, the suppression of the vortex shedding flow is tested to solve a uniform flow past through two different diameter cylindrical in the flow field with Fractional Step Method and Immersed Boundary Method.The numerical method which we investigated is showed that the results of the problem is appropriable in other literatures.

接著探讨流过具攻角之椭圆柱体流场及流过圆柱抑制涡漩逸出之流场，目的是要研究利用控制圆柱来抑制下游涡流的流场行为，本文采用分步法配合内嵌边界法数值解析一均匀流流经两不同直径的圆柱流场，来测试抑制涡流逸出的问题，根据现有的数值结果发现试验运用了合适的方法且得到令人满意的结果。

In many of his works, fragments of pure colors in the computerized painting system are used to make up a net or block of colors, so that the stream of colors can bring the implication of then stream of information.

在许多作品中，由金将电脑绘图系统中的纯粹色彩的碎片组成了色彩的网络与团块，以色彩之流暗示了信息之流。

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。

All that might be very interesting if we recognised a divine power, based on itself and always alike, guiding its peoples through Napoleons, Louis', and writers; but we do not acknowledge such a power, and therefore before talking about Napoleons, and Louis', and great writers, we must show the connection existing between those persons and the movement of the nations.

假如我们承认神权，它依靠其自身，总是借助于拿破仑之流、路易之流和著作家们来管理本民族的话，纵然，这一切说法，都可能是非常有趣的，可是，我们并不承认这种神权，因此，在谈论拿破仑之流，路易之流和著作家们之前，应该阐明这些人物和各民族的活动之间有什么关系。

The flow parameters, which controlled the heat transfer phenomena in the coolant channel of the piston, are identified; the experimental facilities and program will be established in accordance with the parametric conditions experienced by a real marine diesel engine. The experimental result for the flow within smooth-walled duct under the reciprocating motion will be used as the reference datum to assess the results for the study of heat transfer augmentation. As an attempt to enhance the cooling performance, the ribs will be installed in the coolant channels which flow was orthogonal mode for the piston moving direction. Finally, the results obtained for the tests with heat transfer augmentation devices will be compared with the smooth-walled test results.

本研究计画利用座标转换理论，对受到与往复运动正交方向之流场进行参数分析，建立控制此流场热传性能之参数后，模拟实际船舶主机运转时活塞之冷却情形并进行实验量测，作为评估活塞冷却之基准，然后应用现行已实用於工业界的技术，在与往复运动正交方向之圆形冷却通道中加装凸起物以增加热传效能并予以测量其热传系数及其相关之物理现象，据以讨论此流场受往复力之影响，在周向不同位置之热传情形以及其与平行於往复运动方向之流场的差异。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。