气泡形成

Here is the spot where the giant air bubble formed in the mold.

这里是地方的巨型气泡形成的模具。

If there is any particulate matter or cloudiness to the solution filter it first.

如果溶液有微粒状物质或混浊，则首先要过滤溶液，最后要检查一下没有干扰分析的气泡形成。

When the gas flux is constant, the ratio of reduced resistance is improved with the increase of the water stream velocity. However, the relationship between the gas flux and the ratio of reduced resistance is more complex. When the water stream velocity is constant, if the gas flux is small in contrast, the effectiveness of reduced resistance is not obvious. But when the gas flux increased, the jetted gas will form """"archform"""" which will augment the shape resistance. In this condition, resistance could not be reduced and could even be increased, if the gas flux continues to be increased. So that there needs setting a baffle called step, which introduces the jetted gas into the turbulence boundary layer. In this case, the shape resistance may be fairly great. Besides, the waterline of model has also some effect on the ratio of reduced resistance, which acts on the size of wave. If waterline is deep, the wave could not affect the deployment of microbubble layer, so there is almost no effect on ratio of reduced resistance. However, the wave would affect distributing of microbubble layer under the model so that the gas could leak out from the two sides of model and directly affect the ratio of reduce resistance if the waterline is very small. Whether installing the dashplate or not has also the great influence on the effectiveness the ratio of reduced resistance. From the results of experiment, conclusion is that adding dashplate will greatly improve the effectiveness of reduced resistance.

当喷气量一定时，水流速度增大，减阻率提高；喷气量与减阻率之间的关系比较复杂，速度一定时，如果喷气量较小，减阻效果就比较差，但当喷气量增大的话，喷射出的气体就会形成一个&拱度&，增加了船模的形状阻力，在这种情况下最好采取断阶喷气，把气体引入到湍流边界层中，在这种情况下，船模的形状阻力比较大；船模的吃水对减阻率也有一定的影响，主要表现在波浪大小上，如果吃水较深，波浪影响不到微气泡层的分布，对减阻率不会造成太大影响，如果吃水较浅，波浪就会影响到微气泡层在船模底部的覆盖情况，可能会有部分微气泡从船模两侧泄漏，这样就直接影响到了减阻效果；是否安装压浪板，对减阻率也有较大的影响，从试验结果可以看出，在船模尾部加设了压浪板时，减阻效果明显得到改善。

In this article the indirect and direct evidence for the presence of nanobubbles and the basic properties of nanobubbles, including its formation mechanism, morphography and distribution, are reviewed. And the influence of nanobubbles on the long-rang hydrophobic interaction, fluid slippage and some biological problems is discussed.

本文综述了从提出纳米气泡存在一直到实验证明的过程、纳米气泡的形成机制和形貌、分布特征等基本性质以及纳米气泡的存在对疏水长程作用和流体滑移的影响，并阐述了生物学中一些与纳米气泡存在有关的问题。

The reason that why bubbles grew and how the gas was released from undecomposed TiH_2 were stated. The merging of bubbles and formation of bubble-free laye...

结果表明：未分解的TiH2颗粒粘附在熔体内形成的较小气泡表面，即气/液相界面上；在恒温发泡过程中气泡壁上吸附的尚未分解的TiH2颗粒进一步分解并向气泡内释放气体，使气泡长大；相邻气泡壁上的TiH2局部浓度较高并集中释放气体，导致气泡壁破裂及气泡间的合并。

The closed-cell aluminum foam was fabricated by direct foaming in melt. Through sampling aluminum foam in different stages the cross-section of them were observed and analyzed. It was explained how TiH_2 was decomposed after entered into the melt, how initial bubbles were formed and what was the state that generated bubbles and undecomposed TiH_2 lay in.

以熔体直接发泡法制备闭孔泡沫铝材实验为基础，通过获得不同实验阶段的泡沫铝样品，以及对实验样品切面或断面进行观察和分析，描述了在熔体发泡法制造泡沫铝过程中TiH2加入熔体后的分解过程，原始气泡的形成方式以及产生的气泡和未分解TiH2的存在状态；解释了气泡进一步长大的原因和未分解的TiH2如何释放气体；表述了气泡的合并和无泡层的形成。

This paper mainly described the pertinent knowledge about the generalization of gas supersaturation, the reasons and factors for gas supersaturation. Furthermore, the relations among life stage, hydrostatic pressure, temperature, intermittent exposure, detection, avoidance and the tolerance of fish to supersaturation were analyzed, AndKey words: dam; dissolved gas supersaturation; gas buhhle disease

本文主要就气体过饱和及气泡病做了具体描述，首先叙述了气体过饱和的研究概况、导致气体过饱和的原因和水温、压强等影响气体过饱和的因素，具体分析了鱼类不同生活阶段、液静压、温度、间歇性的暴露、探知和躲避能力导致其对气体过饱和忍耐大小的状况，并对气泡病的内部损伤如血液中形成的气栓、外部症状如身体各个部位形成的气泡做了具体的描述。

The mechanism of void formation in roto-moulding of long-fiber reinforced resin is studied through some experiments.

利用试验的方法研究了长纤维增强反应性树脂复合材料旋转模塑成型工艺气泡的形成机理，得到了制品表面气泡形成过程的直观模型，分析了气泡形成的影响因素，并分别研究了各个因素的影响机理。

The mechanism of void formation in roto-moulding of long-fiber reinforced resin is studied through some experiments. The intuitionistic model of surface void is obtained.

利用试验的方法研究了长纤维增强反应性树脂复合材料旋转模塑成型工艺气泡的形成机理，得到了制品表面气泡形成过程的直观模型，分析了气泡形成的影响因素，并分别研究了各个因素的影响机理。

Results After improving, lithotripsy could recycle no-air water to be filled into shock wave generator. It not only increased shock wave conducting and stone breaking efficiency, but also decreasee air content in shock wave generator and outer conduct passway, and decreased bubble forming, thus reducing complication in more rational procedures.

结果：该改进后碎石机可以反复利用制备的无气水填注冲击波发生器内，减少冲击波体外传导途径内的气体含量，减少气泡形成，提高冲击波传导效率进而提高碎石效率，简化碎石操作程序使碎石过程更加合理。

In the United States, chronic alcoholism and hepatitis C are the most common ones.

在美国，慢性酒精中毒，肝炎是最常见的。

If you have any questions, you can contact me anytime.

如果有任何问题，你可以随时联系我。