论文部分内容阅读
研究了一种喷嘴的雾化与流场特性。在喷嘴上游以一定方式将空气或其它种类的气体注入液体中形成两相流动，用水在常温、常压下进行试验。研究了水平喷射时，喷嘴的气体注入方式、气孔大小、锥形收敛段的结构尺寸及气液比对喷嘴雾化和流场特性的影响。试验结果表明，气泡雾化喷嘴水平喷射与竖直向下喷射存在明显的差别，喷射方向不同，喷嘴内的两相流动不同，因而雾化特性不同，收敛段的结构对雾化特性也有影响。该喷嘴的显著特点是在小气液比下可获得较好的雾化效果，因而具有深入研究的价值
The atomization and flow field characteristics of a nozzle were studied. In the nozzle upstream in a certain way to the air or other types of gas into the liquid to form a two-phase flow, with water at room temperature and atmospheric pressure test. The effects of gas injection mode, pore size, structure size of conical convergent section and gas-liquid ratio on nozzle atomization and flow field characteristics were investigated. The experimental results show that there are obvious differences between the horizontal jetting and the vertical downward jetting of bubble atomizing nozzles. The jetting directions are different and the two-phase flow in the nozzle is different. Therefore, the atomization characteristics are different. The structure of the converging section also has an influence on the atomization characteristics. The notable feature of this nozzle is that it achieves good atomization effect at small gas-liquid ratio and therefore has the value of further research