相似原理

Experiment and flow visualization are conducted in a water-filled cavity which cover the range of Ra=1×10〓----6×10〓 and Pr=3. 3---6. 5. Similarity theorem is applied in analytical investigations. And core region stratification effects to heat transfer are studied. By using scale analysis, temperature and velocity profiles in turbulent natural convection boundary layer are obtained. The results reveals that for turbulent natural convection in enclosures, the bulk of the cavity fluid is essentially statement with thermally stratified temperature and the only substantial motion is that in the boundary layer along four side walls.

在实验方面，作者在高Ra范围内（Ra〓=1×10'~Ra〓=6×10〓，Pr=3.3~6.3）对封闭空间实验台以蒸馏水为介质进行了换热实验与流动显示；在理论分析方面，作者采用相似原理导出了分析解；研究了核心区温度分层规律及其对换热的影响；另外还运用尺度分析法探讨了紊流自然对流边界层温度与速度分布。

On the basis of similarity criterion, the infiltration process of molten aluminum in the prototype is similar to that of simulant liquid in the model.

根据相似原理，采用模拟试验的方法研究了与铝液相似的模拟液在负压作用下的渗流动力学规律。

The infiltration dynamics of simulant liquid under negative pressure was studied by simulation test in accordance with the laws of similitude.

根据相似原理，采用模拟试验的方法研究了与铝液相似的模拟液在负压作用下的渗流动力学规律。

The relationship between the sputtering and absorption of alloy elements reflects the real situation in the application of this technology.

辉光放电中的相似原理，较好的解释了工业化应用中的电流放大问题，归一化的计算，已应用于实际生产中。

After comparing the obtained data with those of olive tree original producing area , using climate similarity theory , the index for Olea european suitable planting division was established .

对油橄榄园定点观测试验资料以及采用气候相似原理与原产地和国内引种地的气候生态条件对比分析，探讨白龙江沿岸油橄榄气候生态适应性。

In order to illustrate the phenomena occurred in the technological experiments, the infiltration dynamics of liquid aluminum into porous media was simulated in accordance with the laws of similitude. The results show that (1) the relation between the displacement of infiltration front and the advancing time is 〓;(2) the pressure of infiltration changes with time according to 〓;(3) the distribution of pressure in the direction of infiltration length is P=a〓+b〓L.(4) the change of temperature or viscosity of molten aluminum affects infiltration velocity in fillers of diameter in the range of 1. 5～5. 5mm very little, but this velocity in fillers of diameter 0.5mm is reduced with the decrease of AL temperature.

为了说明工艺试验中显示的各种现象，作者根据相似原理，采用模拟试验研究了铝液在多孔介质中的渗流过程，得到铝液渗流动力学规律如下：（1）渗流前沿位移—渗流进行时间关系为〓；（2）渗流压强随渗流时间的变化规律为〓；（3）渗流压强沿渗流长度分布为P=a〓+b〓L；（4）铝液温度降低或粘度加大时，对大于1.5mm的颗粒之间的渗流速度影响不大，但使0.5mm颗粒之间渗流速度减小。

The controlling effect of tectonics to evolution of microcracks is analyzed by using the damage mechanics theory. These characteristics can be analogized to kilometer meters as the first effect of earthquake precursors. These studies may be helpful to interpret the foreshock or general foreshock in the moderate or short stage before strong earthquakes.

根据微破裂集结临界条件的相似原理，认为这些特征可以类推到公里尺度，它们有助于解释地震中短期阶段的前震或广义前震分布，作为地震前兆的一次效应。

The flow in swirling flow tundish and swirling chamber is simulated in according to similitude theory. The influences of the diameter and height on conglomerating to center and floating are studied and the inclusion removal effect of the swirling chamber is validated.

根据相似原理，模拟漩流中间包及漩流室内钢液的流动，研究了不同漩流室直径、高度对夹杂物在漩流室内向心聚集上浮的影响，验证漩流室对夹杂物的去除效果。

Dynamic equations of micro gas turbine with single shaft were solved using an analytical method for the first time.

以上述理论分析为基础，本文根据相似原理，运用混合仿真方法首次建立了能源岛三联供混合仿真装置。

In allusion to the characteristic of riblets surface, the computation region, grids and flow parameters were dealt with reasonably, and mechanic similarity principle was brought forwards into fluid field numerical simulation.

针对沟槽表面流场的特点，在数值计算过程中对其计算域、计算网格及其流动参数进行了合理化的处理，并尝试将力学相似原理运用于沟槽表面流场的数值仿真。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。