论文部分内容阅读
研究了一种新型锥面注气方式的气泡雾化喷嘴，用水和压缩空气在常温常压下试验了水平喷射时结构和工作参数对雾化及流场特性的影响，用2D-PDA测量了液雾的平均直径尺寸分布和速度分布。结果表明，注气孔的尺寸及数目均对雾化特性产生一定影响；气泡发生器的锥角存在一最佳值，对于本文研究的结构，60°锥角可达到良好的雾化；混合段长度也存在一最佳值范围，提高液体的喷射压力和气液比，能够改善雾化，增大液雾的速度。实验结果表明，锥面多孔注气能有效地抑制水平喷射情况下由浮力产生的气泡聚合，能够使气泡均匀分布，实现稳定、连续的雾化。
A new conical gas bubble atomization nozzle was studied. The effect of structure and working parameters on atomization and flow field characteristics was tested under normal temperature and pressure with water and compressed air. The average diameter size distribution and velocity distribution of liquid mist. The results show that the size and number of gas injection holes have certain influence on the atomization characteristics. The cone angle of the bubble generator has an optimum value. For the structure studied in this paper, the cone angle of 60 ° can achieve good atomization. The length of mixing section There is also an optimum range of values that enhances the jetting pressure and the gas-liquid ratio of the liquid to improve atomization and increase the speed of the liquid mist. The experimental results show that the porous gas injection cone can effectively suppress the bubble polymerization caused by buoyancy in the case of horizontal injection, and can uniformly distribute the bubbles and achieve stable and continuous atomization.