风速管

The atmospheric temperature showed great impact on the surface temperature of the anemometer.

大气温度对风速管表面温度的影响最大。

Anemometer is a very important device for aircraft to measure the flight height and velocity.

飞机风速管是测量飞行速度和高度的重要设备，对其进行防冰研究具有很大的实用价值。

Based on the calculation of aerodynamic flow field, overcooled water droplets trajectories and energy equation, surface temperatures of the anemometer under various conditions were obtained.

通过对空气流场、过冷水滴运动轨迹的计算和能量方程的求解，得到了多种状态下的风速管表面温度。

Furthermore the performances of heat transfers including corrugate plate, tube and fin-tube were compared under the same conditions. The results show that when the air frontal velocity is between 2.45 and 4.1m/s, the overall heat-transfer coefficient of plate heat exchanger ranges from 100 to 160 W/m^2/ equal to one sixth of that of fin- tube cooler based on tube outside area, which is about 70% higher than that of tube cooler. The volumetric heat transfer capacity of plate cooler is 1.5 times as that of fin-tube cooler and 15 times as that of tube cooler. The heat transfer capacity of per unit power of plate cooler is 5.5 times as that of tube cooler and similar results for fin-tube cooler.

在相同工况下，比较了波纹板式、光管式和翅片管式空冷器的性能指标，结果表明：迎面风速在2.45~4.1m/s之间，波纹板式空冷器传热系数达到100~160W/平方公尺/℃；约比光管式提高70%，但只有以管束外表面为基准的翅片管式传热系数的六分之一；板式空冷器单位体积换热量约是翅片管式空冷器的1.5倍，是光管式的15倍；板式空冷器单位功耗换热量约是光管式空冷器的5.5倍，而翅片管式空冷器与光管式空冷器则相差不大。

The results indicate that the characters of twisted tubes are better than round tubes, and the heat transfer coefficient and power characters are increased with the diminishment of geometry sizes and the increase of fluid parameters.

实验结果表明，扭曲管比圆管的性能好，螺距和管径越小、水喷淋密度和风速越大，传热系数越高，但流动阻力同时增大，存在合适的螺距、管径、水喷淋密度和风速使蒸发式冷凝器综合性能最佳。

The influences of reservoir pressure and pulse duration on instantaneous velocity are investigated.

在由 3根陶瓷滤管组成的实验装置上，利用热线风速仪对脉冲反吹时滤管外瞬态流场进行了测定，分析了喷吹压力和脉冲宽度对滤管外流场的影响。

Through the analysis of the distributions of cold pulverized coal concentration and the area of high concentration zone, it was concluded that the smaller the central air expanding angle was, or the later the secondary air interfused, the larger the area of high concentration zone was.

通过分析冷态煤粉浓度的分布及煤粉高浓度区域面积的大小，得到：中心管扩角越小，二次风混入越晚，冷态高煤粉浓度区域面积越大；一次风率为0.2、一次风速为15 m/s、直流二次风速为25 m/s时冷态高煤粉浓度区域面积较大，有利于降低NOx的生成；内二次风旋流开度减小较外二次风旋流开度减小对冷态高煤粉浓度区域面积的影响大；内旋流强度为1.35、外旋流强度为1.56为最佳的试验工况。

Based on the present results and those from the former investigation by Nakayama, a general correlation is proposed to describe the airside performance of slit fin configuration.

从乾盘管测试结果发现，狭缝型鳍片热交换器的热传效率会随鳍片的减小而增加，当管排数大於4时，鳍片间距的影响在中低风速的情况是相反的。

Analyses factors which affect apparatus dew point by theory and experience. Points out that to a given surface air cooler, the relation between apparatus dew point temperature and entering air dry bulb temperature or entering cooling water temperature is linear under dry cooling conditions, and the relation between apparatus dew point enthalpy and entering air enthalpy or ...

指出结构特性一定的表冷器，干工况下冷盘管表面平均热状态温度和进风干球温度、冷水初温成线性关系；湿工况下在空调常用范围内，冷盘管表面平均热状态焓值和进风焓值、冷水初温成线性关系，且两种工况下冷盘管表面平均热状态温度都随迎面风速增大而增大，随水流速增大而减小。

Based on the research on sensitivity of geomagnetic declination on wind measurement by UAV with Pitot-static tube,mathematical model of wind speed error to effect of geomagnetic declination is set up in virtue of wind measurement theory and error theory.

从无人机(unmanned aerial vehicle，UAV)皮托-静压管测风对磁偏角的敏感性出发，借助无人机皮托-静压管测风原理和误差理论，建立了磁偏角对测风影响的风速误差数学模型；通过仿真，分析了磁偏角对风速测量的影响和误差变化规律，并通过试验数据验证了仿真结论，为磁偏角的校正，提高风速测量精度提供了参考依据。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。