小型受限撞击流反应器内混合特征及激励强化

摘要

利用平面激光诱导荧光技术（planar laser induced fluorescence，PLIF）研究了小型受限撞击流反应器（confined impinging jets reactor，CIJR）内混合特征及激励强化，射流入口Reynolds数范围为75～150。研究结果表明，在受限撞击流反应器内，由分离流模式向自持振荡模式转变过程中，两股流体间的混合效果逐渐提升；当流动为分离流模式时，激励能有效地强化两股流体间的混合，而当流动转变为自持振荡模式时，激励对流体混合的影响较小。%An experimental study is undertaken on liquid mixing process in mini confined impinging jets reactor (CIJR) with excitation by using planar laser induced fluorescence (PLIF) technique quantitatively, and the jet inlet Reynolds number is in the range of 75 to 150. The results show that the mixing effect of two fluids significantly increases during the segregated steady flow translates to the dynamic chaotic flow regime in CIJR. The excitation affects the mixing process in CIJR and the mixing performance is enhanced in the segregated flow regime. However, the excitation has no significant influence on the mixing for the flow in the oscillation regime.