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The influence of inlet turbulence intensity on the velocity, temperature, turbulence kinetic, friction coefficient and Nusselt number is limited on a limited region which is smaller than 30d.

5旋转螺旋管道内的入口湍流强度对流动和温度场结构、湍动能、摩擦系数以及Nusselt数的影响都局限在距离入口端不超过30倍管道直径的有限长度内。

The results show that smaller height of reaction channel can shorten the time which reactants diffuse from channel to reaction surface, longer length of micro-channel can extend residence time of reactants on the catalyst surface, and consequently increase the methane conversion and hydrogen production. The pressure drop between inlet and outlet increases lineally with the increasing of length, while the height influences the pressure drop significantly when the height is less than 0.4 mm. Based on the overall consideration for the methane conversion and resistance characteristic generally, the suitable height of channel should be between 0.4 mm and 0.6 mm.

结果表明：较小的通道高度能够减小反应物在通道中的扩散时间，较长的反应通道长度能够增加反应物与催化剂的接触时间，甲烷转化率和产氢率提高；通道长度线性地影响微通道进出口压降的大小，而在通道高度小于0.4mm时，通道高度显著地影响进出口压降的大小；综合考虑微通道的重整性能和进出口压降等因素，通道高度在0.4~0.6mm之间较为合适。

In this paper, formulas for calculating the thickness of the turbulent boundary layer and the inlet length in the entrance region of the rough pipe are given with the help of momentum integral equation in which the velocity distribution is the logarithmic law.

本文在流速分布对数律假设下，通过求解动量积分方程获得了粗糙圆管进口段紊流边界层和进口段长度的计算式。

Complex wave structures of supersonic inlet at different inflow Mach number and angle of attack related to critical status were achieved by numerical simulation.

通过数值模拟得到了对应于不同来流马赫数和攻角情况下，临界工况时，超声速进气道内外粘性流场复杂的波系结构。

The researches for investigating the influence of the inlet structure of the heat exchanger for two-phase flow on vapor-liquid maldistribution are reviewed.

介绍了低温两相流板翅式双相变换热器的结构和特点，回顾了板翅式换热器两相流体入口分配结构对其气液分配特性的影响。

One side link to the manual valve and the high pressure regulator inlet, the other side link to 8mm rigid fuel line

一端连接到手动截止阀上以及高压减压器进口；另一端连接8mm高压钢管，用于连接管路中的气瓶和阀门等。

An extremely high temperature of anode humidification is also unreasonable; as a result, when the current density is high, the liquid water should be injected directly into anode gas channel to guarantee both high inlet H〓 concentration and well-humidified membrane. 4. The utilization of Pt in the cathode catalyst layer will decrease with the increasing current density; as a result, based on the principle of maximal Pt utilization, the catalyst layer can be designed much thinner or not uniformly in the catalyst distribution.

而在此截面上，交指型流场燃料电池阳极侧的液态水饱和度的极值位置并不确定；在电池阴极处，液态水饱和度的极值总是出现在z=0.002m处的气体扩散层和膜的界面上，并且该处的液态水饱和度沿x方向存在一个最大值，与此相应的氧气的质量浓度分数在该处达到极小值，因此极限电流密度将首相出现该处，但总体来说液态水饱和度沿x方向的分布较为均匀。4。

The moving reference frame is used in the impeller region and the boundary conditions are velocity inlet and pressure outlet.

在计算时对于叶轮区域采用旋转参考系的方式，边界条件分别是进口速度边界条件以及出口压力边界条件。

Nose Cowl - Front section of the nacelle for air inlet to the engine.

前整流罩一引导空气进人发动机的短舱的前段。

The project activities include the use of FLUENT to optimize the scarf angle of the inlet face of an aero-engine nacelle, making the compromise between ground noise levels and aerodynamic performance.

该项目的活动包括使用流利的优化围巾角湾面临的航空发动机短舱，使地面之间的妥协噪音水平和空气动力学性能。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。