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首页> 外文期刊>Advanced Experimental Mechanics >Effect of Orifice Shape and Dissolved Gas on Bubble Generation in Two-Phase Nozzle Flow by Pressurized Dissolution Method
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Effect of Orifice Shape and Dissolved Gas on Bubble Generation in Two-Phase Nozzle Flow by Pressurized Dissolution Method

机译：加压溶解法孔口形状和溶解气体对两相喷嘴流气泡产生的影响

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摘要

The aim of the study is to examine the effect of the amount of the dissolved gas on the two phase flow and to examine the acceleration of bubble generation on two-phase nozzle flow by modifying the shape of orifice plate. In the experiment, the molar concentration of CO_(2) gas was changed at the dissolution process. As increasing the CO_(2) molar concentration, the void fraction increased and the liquid velocity decreased at the throat. On the other hand, the bubble velocity was almost constant when dissolved gas rate was changed. Therefore, the slip velocity between the bubble and the liquid increased. Moreover, the amount of bubble is different by changing the hole type of orifice plate such as different holes diameter and respective cross section area for each plate. In case of the orifice of seven holes, it cannot reach the sound speed at the throat but it is closest to the sound speed in the case of other orifices.
机译：该研究的目的是检查溶解气体量对两相流的影响，并通过修改孔板的形状来检查气泡在两相喷嘴流中的加速作用。在实验中，溶解过程中改变了CO_（2）气体的摩尔浓度。随着CO_（2）摩尔浓度的增加，孔喉处的空隙率增加而液体速度降低。另一方面，当改变溶解气体速率时，气泡速度几乎恒定。因此，气泡和液体之间的滑动速度增加。此外，通过改变孔板的孔类型，例如不同的孔直径和每个板的相应横截面积，气泡量是不同的。在有七个孔的孔口的情况下，它无法达到喉部的声速，但在其他孔口的情况下，它最接近声速。

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