液体流动

Wholly the theory of temperature boundary layer in pipeline is studied by the paper.

研究了高粘性液体管道流动的热边界层理论。

The shrinkage effect interacts with the liquid wetting ability and the expansion effect induced by the mass flow, resulting in distinct bulgy structure in the cross-section of the film rim.

Marangoni流动引起的收缩效应与液体润湿性及流动压力的扩展效应相互作用，在液膜边缘形成了凸起区。

An aerosol spray device which is capable of imparting a unipolar charge by double layer charging and charge separation to liquid droplets of a composition sprayed therefrom has a spraying head in the form of an insert in an actuator, the spraying head having a bore through which liquid is expelled having an outlet, preferably with a tortuous periphery, having an L/a ratio of at least 8 (preferably at least 10) where L is the length of the periphery defining the bore outlet in mm and a is the cross-sectional area of the bore outlet in mm2 and the apparatus being constructed such that the droplets are expelled from the spraying head at a flow ratio of at least 0.4 (preferably at least 0.5) grams per second and have a charge to mass ratio of at least +/-1x10-4 C/kg.

本发明还提供了一种喷射装置，它能够通过双层充电和电荷分离而向要喷出的组合物液滴施加单一极性的电荷，该喷射装置具有一个喷头，该喷头制成为致动器中的插入件的形式，喷头具有一个孔腔，液体能够通过该孔腔从装置中排出，该孔腔具有一出口，该出口最好具有曲线周边，并且L/a比率至少为8，其中L是以mm为单位的确定孔腔出口的周长，a是以mm2为单位的孔腔出口的横截面积，该装置构造成使得液滴在至少每秒0.5克的流动速率以及具有至少＋／－1×100C/kg的电荷／质量比的状态下从喷头排出。

The friction coefficient and apparent viscosity of the CH4-hydrate slurry were calculated under various pressures and liquid flow rates.

将的非均相体系当作拟流体处理，建立水合物浆液的流动模型，应用该模型及实测数据计算了各实验体系在不同压力和液体流量下的摩擦阻力系数和表观粘度。

The concept of compressible fluid flow is usually employed for gases moving at high velocity, unlike the concept of incompressible flow, which is used for liquids and gases moving at a speeds well below sonic velocity.

的概念，可压缩流体流动通常是受雇为气体运动在高速度，不同的概念，不可压缩流动，这是用于液体和气体运动在速度远低于声速。

The relative permittivity calculated from the high frequency value of impedance spectra,was used as the index to monitor properties variation with immersion time.

结果表明，涂层在流动的条件下加速失效，失效的原因是液体的流动加速了溶液中离子，而不是水分子向涂层中的渗透。

The motion of the fluid flowing through a SKstatic mixer in laminar flow can be resolved into rotary motion and straightline motion, so we can respectively calculate the flow resistance of the two motions.

将流体在静态混合器中作的层流流动分解为直线运动和旋转运动，然后分别计算这两种运动在流管中的流体阻力，并将两者相加后得到SK型静态混合器中液体层流流动时流体阻力的计算式。

When pH is litmusless, the purification efficiency is the largest. The unhomogeneity of liquid flow results in the uneven biofilm growth. The flow resistance after start-up is significantly larger than that before start-up, whichprovides a method to monitor the biofilm growth.3、The packed bed is simplified to a series of straight capillary tubes covered by the biofilm. The two-phase flow and mass transport, biochemical reaction kinetics, and the limitation of oxygen are taken account of in this model. The results of model are basically in agreement with the experimental data.

通过观察还发现，由于液体分布不均，生物膜在滴滤塔内生长分布不均，并且挂膜后，滴滤塔的孔隙率减小，两相流动阻力比空塔时的大，可采用流动阻力的变化作为判断挂膜成功与否判据。3、首次将多孔填料塔简化成多个竖直毛细管并行排列构成的填料，应用两相流理论，结合生化反应动力学，并考虑氧的限制，建立了一个生物膜滴滤塔降解废气的毛细管模型，其结果与实验数据吻合得较好。

The oil has to have a low pour point in order to flow and still have sufficient viscosity for the compressor lubrication.

油不得不具有有一个很低的流动点（流点：油或其他液体在规定条件下流动的最低温度），还需要有足够的粘度作为压缩机的润滑作用。

The concentric tapered pipe/reducing socket is advantageous to the fluid flow, in changes the diameter time is small to the fluid fluid state's disturbance, therefore the gas and vertical mobility's liquid pipeline use concentric tapered pipe changes a diameter.

同心异径管/大小头有利于流体流动，在变径的时候对流体流态的干扰较小，因此气体和垂直流动的液体管道使用同心异径管变径。

It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发，分析对称连杆曲线上鲍尔点的产生条件，提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品，年生产总值3000万美元，产品价廉物美、选料上乘、质量保证，深受国内外客户的青睐