对流

Then the secondary electron emission yield of MgO film were measurement on the dynode structures. We successfully demonstrated that primary electron energy effect the curve of SEE yield according to previous study. We found that the magnitude of the secondary electron em....

驱动的原理是以集热板吸收太阳热能，透过热管快速传递热量的特性将收集到的热能快速而高效的传递到远端的散热鳍片，鳍片温度上升高后，以自然对流的方式驱动鳍片周遭的空气上升，进而使建筑物内的空气来递补，。。。。

Suggest you to open more doors and windows for ventilation, based on the convection of the exhaust fan is installed on the doors and windows.

建议你在多开门窗通风的基础上，在对流的门窗上安装抽风机。

Using the large eddy simulation and particle direct simulation, the diffusion of particle in sudden expansion pipe is modeled.

对江水换热引起的污垢热阻，采用热力学第一、二定律和熵产分析法，分析污垢对管内对流换热过程性能的影响。

This study experimentally examined the heat transfer characteristics of 180-deg turning duct under forced convection cooling, as the internal cooling structure of 180-deg turning duct is widely applied to industrial cooling. While several perforated holes were separately arranged within the 180-deg turning duct, the cold flow of better cooling capability was guided in the first duct into the second duct in advance, so as to reduce the overheating of the second duct and realize uniform cooling of the machine members. In addition, the centrally separated holes could yield extra turbulence against the air current, and the interaction between bypass air current and mainstream may possibly improve the overall heat transfer capability.

本研究系以实验方法探讨180度转弯通道於强制对流冷却下之热传递特性，180度转弯通道之内部冷却构型在工业冷却之应用非常广泛，本研究设计将180度转弯通道其中间分隔具多个穿孔，目的在将第一流道内具较佳冷却能力之冷流提早引入第二流道，以减少第二流道产生过热情况，如此可使得机件获得均匀之冷却，此外，中间分隔上之穿孔对气流也具有额外之扰动效果、流经穿孔之旁通气流与主流交互作用，这都有可能增益整体热传能力。

This may explain why he has put out feelers to exiled leaders of the former southern state.

这或许能够解释为什么他要对流放在外的前南方州领导人进行试探。

It can absorb and block fire radiation.The belts also decrease the convection.

它可以吸收和阻挡火焰向前方的辐射，减小火场对流和阻挡火烧散块的穿越。

The men water temperature and pipework spacing can be varied to provide the required space temperature overcoming issues such as excessive heat loss or unfavourable floor finish ,and would have been carefully considered by the system designer.

现代地暖系统是将低温热水通入嵌在地板内的管道来工作的。被加热的地板向空间内辐射热量。热传导和对流只占其中很少的一个部分。系统散热量有以下几个因素所决定

Through the flue gas and air characteristic analysis in supercharged boiler,the results showed that the value of parameters would increase with the increase of fuel consumption.And volume heat load of the furnace, fuel consumption, heat change between flue gas and convective heating surface and evaporation value would increase with the increase of compression ratio.The heat calculation would be different because of dissimilar thermal calculation in the turbo-compressor when the boiler load was changed.As the boiler load increased,heat loss in the turbo-compressor would increase and the efficiency of the boiler would decrease.The results of the boiler start-up simulation showed that the time of start-up would decrease with the increase of flue consumption ,but instantaneous pressure amplitude would increase.Steam water"s dymamic diversification would be more complex than flue gas"s,and dynamic characters of their parameters would be changed due to different boiler load and disturbance variable,which was shown by results of the simulation when boiler load was changed.

通过分析增压锅炉内的空气、烟气参数特性，发现随着锅炉负荷的增加，空气和烟气的各项参数值都相应的增加；炉膛容积热负荷、锅炉的燃料负荷随着增压比的提高成比例增加；随着增压比的增大，烟气与对流受热面的换热增加，蒸发量随之增加；由于涡轮增压机组在不同负荷下的热力计算不同而造成增压锅炉在不同负荷下的热平衡计算的不同；锅炉增压机组的总的热损失随着锅炉负荷的增加而增加，而增压锅炉的热效率随着锅炉负荷的增加而减少；锅炉启动模拟仿真结果中发现，锅炉启动时燃料量增加，锅炉的启动时间就会减少，但是瞬时升压速度会增加；而动态负荷变化模拟仿真结果中发现，锅炉汽水侧的变化相比烟气侧更为复杂，且在不同负荷和不同扰动量下，烟气侧和汽水侧的重要参数动态特性是不同的。

The second scheme shows super-approximation for flux function at central point of element as grids ate orthogonal.

在正交网格下，第二种格式对流函数在单元中心点的值还具有超逼近性。

A wall heat flux function was introduced to separate the numerical prediction of internal heat transfer in aircraft from that of thermal effects outside the skin.The thermal network method combined with the Monte Carlo method was used to analyze the internal heat transfer and the FLUENT code was employed to simulate the aerodynamic convection outside skin.

引入壁面热流函数，将蒙皮外部热环境与飞机内部换热进行解耦计算，采用热网络法与蒙特卡罗法进行飞机内部传热分析，利用FLUENT软件进行蒙皮外气动对流换热模拟，建立了飞机蒙皮瞬态温度场的数值方法。

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％。