查询词典 flow

In accordance with the established design flow and design of lift in the type spectrum, the first ordinate in order to design the head to find out the requirements in line with the head, while the flow ranging from a few pumps, and then in the abscissa in order to design the flow to determine the selection of What kind of pump.

根据确定的设计流量和设计扬程，在型谱图上，首先在纵坐标上以设计扬程查找出符合扬程要求。而流量不等的几种水泵，然后再在横坐标上以设计流量来确定选用哪一种水泵。

, though particles are not in the flow passage of the outlet of the impeller, the absolute velocity of particles has a component velocity whose whirling direction is the same as that of the impeller under the influence of the revolving impeller, in addition, particles do not flow toward the outlet of the impeller, instead, they flow toward the inlet of impeller.

款 尽管粒子是不是在流道叶轮，绝对速度的粒子的一个组成部分，其速度旋转方向是相同的叶轮的影响下， 3777叶轮，此外，颗粒不流向叶轮，相反，它们流向导流叶轮。

In this paper, the bump patterns for flip-chip packages are discussed first, then an experiment is setup to study the dispensing phenomena for different bump patterns, and the CAE software is used to analyze and identify with experiment mutually. From these thorough comparisons and analytical analysis, the existence of channel could slow down the flow, the high density of bump could speed up the flow, and it could avoid the air trap by modified the bump and channel's arrangement on flip-chip package. Then flows in rectangular microchannels driven by capillary force and gravity are discussed; furthermore, the theoretical model of flow in microchannel driven by capillary force and gravity is formulated from the Navier-Stokes equations.

本文首先针对覆晶底部充填进行相关理论推导、实验与模拟，探讨不同凸块配置模型所造成的波前不平滑现象对底部充填流动的影响；即依据相关参数建立模型进行底部充填实验，同时以CAE(Computer-Aided Engineering)模流分析软体进行模拟，在完成理论探讨、实验与模拟分析之后，交叉比较理论、实验与模拟分析结果，归纳出影响底胶充填流动之因素，由结果显示在凸块密集度较高的区域，凸块可以帮助流动，但是在凸块区后方的沟槽区域则因为凸块区所提供之流量不足，所以会造成波前落后的现象，另外藉由修改凸块与沟槽配置的关系，可以有效的控制波前形状的变化情形，避免产生包风现象。

The hot-wire anemometry was also used to characterize the air flow patterns that were generated by high and low swirl port in a cylinder of a steady-flow rig. Some important phenomena of air flow in the simulative cylinder were found.

借助于热线风速仪研究了两种不同的螺旋进气道在稳流气道试验台的模拟气缸中产生的流场结构，发现了一些重要的现象。

It is shown that laser anemometry, as a non-intrusive anemometer, is more suitable and convenient than traditional instruments in application to rotational flow fields, especially to the flow within centrifugal impellers which have only small width of flow passage.

研究表明，激光测速仪作为一种先进的非接触式测速仪器在旋转流场特别是流道高度很小的离心旋转流场的研究中较之传统仪器更合适、更方便。

ABSTRACT In this paper, an investigation on the helical ports was carried out in a steady-flow rig. The three velocity Components of air flow through the intake valve of several typical helical ports were measured by hot-wire anemometry for analysing the relationships between intake port geometry and swirl level as well as flow resistance.

本文在稳流气道试验台上对螺旋进气道进行了大量的研究，为了分析螺旋进气道的结构形状与涡流强度及流动阻力的关系，采用热线风速仪测量并分析了不同气道的气门口气体流速。

By using Laser Doppler Anemometry, the local liquid velocity profiles of the single-phase flow and two-phase crossing flow were measured on a sieve tray simulator. The effect of gas on liquid under crossing flow was studied.

本文通过使用激光多普勒测速仪对矩形塔板上液相单相流和气液错流情况下的局部液相流场进行测量，考察了气液错流时气相对其周围局部液相流场的影响。

The main work and the originality points of this dissertation could be concluded as the following parts:(1) To analyze systematically the mathematical model of LES of air flow in great space, under the case of isothermal and non-isothermal, as well as the combined action of buoyancy and strain. Some basic problems are studied about the LES application into airflow simulation of great space, such as boundary conditions, spatial difference scheme and time advancing scheme, time step etc., which creates the basis for the LES application to indoor airflow simulation.(2) Both the instantaneous and time averaged flow field of great space with multiple jets under isothermal and non-isothermal cases are explored with large eddy simulation method, and also discussed the dynamic characteristics and the law of fluidflow in the great space.(3) Based on the results of LES of the great space and the Fanger thermal comfort indexes, it is brought forward the concept of the series of dynamic thermal comfort evaluating indexes, which could be divided into thermal comfort index with time averaged properties PD, PPD, PMV, thermal comfort index with instantaneous properties IPD, IPPD, IPMV, and time averaged thermal comfort indexes TAPD, TAPPD, TAPMV, and transient situations time averaged thermal comfort indexes TTAPD, TTAPPD, TTAPMV. The differences among them and the calculation methods are discussed, and the four kinds of indexes are calculated with the thermal comfort index PD as an example.(4) Based on the LES results it is discussed the hot air stratification phenomena in air-conditioned buildings in the case with air supply and return registers on the ceiling and the case on the sidewall. The fundamentals of the hot air stratification are studied and the relations of estimating hot air stratification are brought forward.(5) With the advanced apparatus such as hot wire film anemometer IFA300 and laser particle field anemoscope, corresponding model test and site measurements have been done, which are compared with the simulation results and LES is proved a very promising method in air flow simulation indoor.

本文主要工作既创新点体现在以下几个方面：(1)系统分析了等温、非等温和考虑剪切力与浮升力综合作用的高大空间大涡模拟数学模型，并研究了高大空间大涡模拟在室内气流仿真应用中的一些基本问题，如边界条件、空间离散格式和时间推进格式、时间步长选择等问题，为大涡模拟在室内气流计算中的广泛应用打下了基础；(2)首次用大涡模拟方法研究了高雷诺数下高大空间多射流在等温、非等温情况下的瞬时流场和时均流场分布，并探讨了多射流流场的动态特性和流动规律；(3)基于大涡模拟的动态仿真结果和Fanger的热舒适指标，首次系统地提出了动态热舒适评价指标体系的概念：即基于时间平均参数的热舒适指标PD、PPD、PMV；基于瞬时参数的瞬时热指标IPD、IPPD、IPMV；基于时间平均热舒适指标TAPD、TAPPD、TAPMV；以及沿行动迹线的时间平均热舒适指标TTAPD、TTAPPD、TTAPMV，并分析了四类热舒适指标的差异性和计算方法，还以PD值为例对四类指标分别进行了计算；(4)基于数十种工况下空调房间大涡模拟的结果，研究了空调建筑上送上回和侧送侧回两种情况下热分层现象，并探讨了热分层的基本规律，首次提出了避免热分层现象的判断公式；(5)在暖通空调领域，首次使用IFA300热线风速仪、激光粒子速度场仪等先进设备，完成了与大涡模拟相对应的模型试验，并把实测结果与仿真结果进行了对比，说明LES在室内气流仿真方面是一种很有前景的方法。

Six cases were found to have normal direction of flow,but in the functional test of the involved upper limb,the reversal flow peak value of the ill vertebral artery increased,or the direction of flow turned from normal to reverse.2-dimensional ultrasound showed that 90% of subclavian steal syndrome were caused by arteriosclerosis,10% caused by aortitis.

结果 TCD检查时，24例患者中18例均表现为椎动脉血流反向，肢体束臂试验反向血流增加，6例血流方向正常，束臂试验患侧椎动脉反向峰值血流速度增快，或由正向变为反向。二维超声示引起锁骨下动脉盗血综合征的病因动脉硬化占90％，大动脉炎占10%。

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。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷