对流

In this paper, research is focused on the heat and mass transfer features during absorption process on the two-scale corrugation plate surfaces of plate-shell heat exchangers. This new Kind structure has vertical large corrugations and horizontal small ones, which can enhance the convection heat transfer of cooling water at internal plate channel side and make the liquid falling film uniformly distributed and turbulent by twisting path, so that the heat and mass transfer characteristics at both sides can be enhanced while sufficient flow area for adequate resistance requirement is also met.

本论文围绕一种新型交叉双尺度波纹板片组成的板壳式吸收器进行研究，这种新型传热元件的相邻板片的竖直大波纹相顶靠，形成曲折的板内通道和菱形板外通道，可强化板内侧冷却水的对流传热，而其水平小波纹则可对布膜的溴化锂浓溶液和冷剂蒸汽产生连续的扰动，使液膜分布均匀，传热传质得到强化。

Tornado is a strong, small-scale air vortex is extremely unstable weather from the air campaign have strong convection, clouds from thunderstorms stretching to the ground at the end of the funnel cloud have a strong whirlwind, Its wind up 12 more, up to 100 meters per second over, the general with thunderstorms, sometimes accompanied by hail.

什么是龙卷风？龙卷风是一种强烈的、小范围的空气涡旋，是在极不稳定天气下由空气强烈对流运动而产生的，由雷暴云底伸展至地面的漏斗状云产生的强烈的旋风，其风力可达12级以上，最大可达100米每秒以上，一般伴有雷雨，有时也伴有冰雹。

And the output of the sensor is less dependent on the flow regime. 7. The helical phase concentration sensor designed has been used in the coal puffing system of the 3# blast furnace in Bao Gang to measure in-situ the coal concentration of the main pipe. Combined with the capacitance velocity sensor, the instantaneous mass flowrate of the pneumatic conveying coal is obtained.

在实验室条件下对螺旋形状表面板电容式相浓度传感器的理论优化结构进行了实验验证，对边保护极板提高检测场中心区域灵敏度的作用也进行了实验验证，静态实验结果与理论计算结果相符，传感器检测场的均匀性误差为4.18%，输出线性度好，对流型变化不敏感。

The hydraulic loss of conduit in both vertical pump system and bulb tubular pump system were calculated using the numerical simulation, and the influence of pump impeller diameter on hydraulic loss of conduit was analyzed. Based on the similitude rules of impeller pump, the relationship between pump impeller diameter and nD value and the influence of pump selection and design were analyzed.

采用数值计算的方法，分别计算了具有不同水泵叶轮直径的立式轴流泵装置和灯泡贯流泵装置的流道水力损失，比较了水泵叶轮直径对流道水力损失的影响；根据叶片泵的相似律，分析了在一定设计流量条件下水泵叶轮直径与nD值的关系以及对水泵选型设计的影响。

The effect of structural forms, angle of poppet, and chamfer of valve seat on the flow field within cone valve is investigated emphatically by analyzing the form of stream line, the data and distribution of pressure and velocity.

通过对流场内流线形状、压力和流速的大小及其分布情况进行分析，着重研究了阀芯半锥角、阀芯结构、阀座倒角等对锥阀流场的影响。

The Guixi Smelter Plant of JCL, constructed originally in 1985, is the first copper refinery in China to adopt the international advanced oxygen enrichment and double convection and double absorption technology.

江西铜业的贵溪冶炼厂始建于1985年，是中国第一个采用国际先进的富氧和双重对流和双重吸收技术的炼铜厂。

The Guixi Smelter Plant of JCL, constructed originally in 1985, is the first copper refinery in China to adopt the international advanced oxygen enrichment and double convection and double absorption technology.

贵溪冶炼厂始建于1985年。是中国第一家引用国际先进富氧和双重对流和双重吸叫技术的铜冶炼厂。

Nbsp;#nbsp;#nbsp; The Guixi Smelter Plant of JCL, constructed originally in 1985, is the first copper refinery in China to adopt the international advanced oxygen enrichment and double convection and double absorption technology.

nbsp；#nbsp；#nbsp；贵溪冶炼厂始建于1985年。是中国第一家引用国际先进富氧和双重对流和双重吸叫技术的铜冶炼厂。

The pattern could be described as the fluids flow separated from the rearward edge of the strips; the fluids flow reattached to the cylinder surface behind the edge; the fluids flow reseparated from the cylinder surface downstream of the cross section of the cylinder.

为精细地描述台阶附近近壁特性，采用分区—耦合方法建立了适体正交曲线网格，采用低雷诺数的k-ε模型作为湍流模型，在非交错网格上建立起差分关系式，引用简化的SOLA算法对流场进行了数值模拟。

The power law scheme was used to calculate convective flux and diffusive flux,the over-relaxed correction approach was employed to calculate cross diffusion flux,and Rhie-Chow s momentum interpolation method along with SIMPLEC procedure was used to derive water level correction equation.

针对非结构网格下的潮流数值计算，采用有限体积法离散基本方程，对流-扩散项离散采用幂率格式，交叉扩散项引入超松弛校正方法，水位校正方程应用Rhie-Chow动量插值思想和SIMPLEC类算法导出。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。