温度系数

Thermal conductivity is measured by the transient hot-wire method, which shows that the thermal conductivity increases with the increase of nanofluid particle volume fraction and temperature. The thermal conductivity of 0.3vol% SiO2-water nanofluid increases by 11.5% at 25℃, while it increases by 46.5% at 50℃ when compared with water at the same temperatures.

采用瞬态热线法测量纳米流体的导热系数，结果表明：纳米流体导热系数的变化与纳米颗粒体积分数和温度的变化成正比，其中25℃时体积分数为0.3%的SiO2-水纳米流体相对于水的导热系数提高11.5%，而在50℃时则提高46.5%。

In virtue of Fluent of CFD software, we carry though computation of aerodynamics of an air-to-air missile in different Mach meter and different attack angle and gained movement trend of lift coefficient、drag coefficient and pitching moment coefficient with variety of Mach number and attack angle, meanwhile, we also obtain distributing trend of pressure, temperature and weather velocity.

借助于商业CFD软件FLUENT，对某型空空导弹在不同攻角、不同飞行马赫数的气动力进行了计算，得出了该型导弹升力系数、阻力系数和俯仰力矩系数随飞行马赫数和攻角的变化规律以及导弹表面的压力分布、温度分布和来流速度分布。

Based on this equation, the effect of pressure, temperature on liquid diffusion coefficients was dis〓sed, then the mutual diffusion coefficients at infinite dilution of 35 binary systems and self-diffusion coefficients of 12 pure substances under high pressure have been calculated.

根据该方程讨论了温度、压力对液体扩散系数的影响，并计算了高压下35个二元物系的无限稀释扩散系数与12个纯物质的自扩散系数。

The calculative results show that the efficient thermal conductivity rises as temperature rises under a constant fiber volume fraction, and it is proportional to the third power of absolute temperature; it decreases as fiber volume fraction increases under high temperature; it increases as fiber volume fraction increases under low temperature, and it is in agreement with that is described in the literature.

此式计算结果表明：在纤维体积分率一定时，其有效导热系数随温度的升高而升高，且它是绝对温度的三次方关系；在高温条件下，其有效导热系数随纤维体积分率的升高而四川大学硕土学位论文有减少趋势；在低温条件下，其有效导热系数随纤维体积分率的增大而增大，与所查文献描述规律一致。

Consolidation test is a important link of obtaining mechanical properties index of soil and coefficient of compressibility gained through the test is a key data to evaluating the compressibility of soil. Consisting of solid phase and liquid phase of the salty soil is different from the non-salty one. Eutectic salt in soil may exist as liquid phase, solid phase or both of them and these phases can interconvert because it is affected by temperature, Na_2SO_4 content, water content. Especially when temperature drops, Na_2SO_4 will crystallize and expand, namely salt expansion of soil. These particularities make soil sample put in environmental cabinet when consolidation test is going on. So soil sample can be compressed by temperature controlling system under a set temperature.From experiment, the formulae counting coefficient of compressibility of salty soil have been given.

土的固结试验，是取得土的力学性质指标的一个重要环节，因为土的固结试验所取得的压缩系数，对评价土的压缩性是一个关键数据，但由于盐渍土的固相、液相组成和非盐渍土不同，土中易溶盐受温度、含盐量、含水量的影响可以以液相、固相、液相和固相混合形式存在，且它们之间的存在形式可以相互转换，尤其是当温度下降时，硫酸钠便结晶产生体积膨胀，即盐胀，这些特殊性就使得在进行硫酸盐渍土的固结实验时，须将土样放置在环境箱中，通过温度控制系统使土样在设定的温度下受压产生变形。

In order to improve the prediction accuracy, the sensitivities of pipe friction coefficients, pressure loss coefficients in bents, wall temperatures and heat transfer coefficients in pipes and cylinders on the volume efficiency are investigated.

为提高充气效率的计算精度，由模拟计算和相关试验，分析了管道的摩擦系数、弯管的压力损失系数、进气管壁和气缸壁温度及其传热系数对充气效率的影响程度。

The curve of expansion versus temper- rature in the temperature elevating process is depicted automatically and the coefficients of mean lin- ear expansion, instantaneous thermo-expansion, transforming temperature and softing point can be printed according to the.

本文介绍了一种■全由计算机进行设定控制的热膨胀仪，可以对温度范围、升温速率、初始条件进行设定，并由计算机完成实时数据的采集及处理，完成升温过程中温度-伸长量曲线自动描绘，并根据用户要求自动打印出各温度段的平均线膨胀系数、瞬间热膨胀转变温度及软化点等，其结构准确可靠、使用方便、自动化程度高，达到国内领先水平。

The moisture diffusion coefficient was increased at the early drying stage when the moisture content was high,and hit the maximum value when the moisture content drew close to the fiber saturation point,and then decreased gradually as the moisture content decreased.

结果表明：干燥温度越高，干燥各阶段水分扩散系数及平均水分扩散系数也越大；初始高含水率阶段，随含水率逐渐降低，水分扩散系数呈逐步增加趋势，在纤维饱和点附近时达最大值；随后，随含水率逐渐降低呈逐步减少趋势。

Based on the Miedema model and Tanaka equation, a new method for calculating the parameters in the molecular interaction volume model has been developed to predict the activity coefficient s of multicomponent liquid alloys, in which not experimental data but only some physical properties of elements are required.

基于Miedema模型和Tanaka关系，提出了计算分子相互作用体积模型参数的新方法。该方法仅需知道元素的某些物理性质而无须熔体的实验数据，简化了计算多元合金熔体活度系数的步骤。分别计算了Ti-6Al-4V和Ti-5Al-2.5Sn在不同温度下组元活度系数的变化，计算了多种铜基合金以及Zn-Sn-Pb-Cd-Bi合金的活度或活度系数与组元配比的关系；并与Wilson模型进行了比较，计算值与实验值较好吻合

With the increase in the downwash flow velocity, the entrainment coefficient decreased, and the exhaust flow temperature increased, resulting in the rapid increases of the exhausting duct temperature and the suppressor surface temperature.

旋翼下洗气流速度的增加，将造成红外抑制器的引射系数降低，出口气流温度升高，出口气流温度分布均匀度增加，并使整流罩及外套特征温度迅速增加。存在一个最佳旋翼下洗气流速度，使储物仓特征温度最低。

I can not make it blossom and suits me

我不能让树为我开花

When temperatures are above approximately 80 °C discolouration of the raceways or rolling elements is a frequent feature.

当温度高于 80 °C 左右时，滚道或滚动元件褪色是很常见的特征。