Abstract: Abstract：An experimental study was undertaken on dense gas-particles swirling jet with disturbance of air source by using high-speed camera. The effects of swirl number and disturbance of air source on the characteristics of particle flow were investigated. The result showed that gas phase had a characteristic frequency which was identical to the natural frequency of fan. The characteristic frequency remained after the introduction of swirl. Remarkable periodic bubbles were formed under the influence of disturbance of air source. When ug＜4.42 m?s-1, disturbance of air source played a central role in the formation of bubbles, and the bubbling frequency was approximately equal to the characteristic frequency of gas phase. In addition, more rapidly dispersion of the particles and larger dispersion angle were achieved with disturbance of air source and strongly swirl.

Key words: dense gas-particles flow, swirling jet, disturbance of air source, bubble

摘要： 摘要：采用高速摄像仪对气源扰动作用下的稠密气固两相旋转射流进行了实验研究，考察了气源扰动和旋流数对颗粒流动特征的影响。结果表明，气相具有与气源固有频率相同的特征频率，引入旋流后，这一特征频率依然存在。两相流在气源扰动的作用下形成了具有显著周期性的鼓泡结构。当ug＜4.42 m?s-1时，气源扰动主导着鼓泡的形成，此时的鼓泡频率与气相的特征频率近似相等。另外，气源扰动以及强旋的引入能够实现颗粒的迅速弥散，并能获得更大的弥散角。

关键词: 稠密气固两相流, 旋转射流, 气源扰动, 鼓泡