T-jet reactors have been widely used in micro/mini reactors for their simple geometries and rapid mixing. Following our previous report (Zhang et al., Chem. Eng. J., vol. 358, 2019, 1561-1573), the present study describes the flow regimes in T-jet reactors with different geometrical parameters at 50≤Re≤400 by using planar laser induced fluorescence (PLIF). The influences of the headspace height (H/h), the outlet aspect ratio (W/w), and the depth of the reactor (w/h) on the origination and evolution of steady and unsteady engulfment flow have been investigated in detail, where h is the inlet height, w is the reactor depth, W is the outlet width, and H is the headspace height. A comparison of the critical Reynolds number (Re) of steady engulfment flow between current work and previous investigations in the literature is presented. The mixing performance of various T-jet channels has also been analyzed using the Intensity of Segregation (IOS). Results show that, the intertwinement of two inlet streams is weakened as the headspace height increases, and the unsteady engulfment flow disappears for H/h≥0.3. The outlet aspect ratio influence the evolution of engulfment flow in the chamber and the unsteady engulfment flow vanishes as W/w reaches 8. Besides, the engulfment of two inlet streams decreases and the unsteady engulfment flow disappears whether the reactor depth increases to w/h=2 or decreases to w/h=0.5.

T型射流反应器因其简单的几何形状和快速混合而已广泛用于微型/微型反应器。以下我们以前的报告（张等人，化学工程J.，卷358，2019年，1561年至1573年），本研究中描述了在与不同50≤几何参数T-喷射反应器中的流态重新≤400通过使用平面激光诱导荧光（PLIF）。详细研究了顶空高度（H / h），出口长宽比（W / w）和反应堆深度（w / h）对稳态和非稳态吞噬流的产生和演化的影响，其中h是入口高度，w是反应器深度，W是出口宽度，H是顶部空间高度。给出了当前工作与文献中先前研究之间的稳定吞噬流的临界雷诺数（Re）的比较。还使用偏析强度（IOS）分析了各种T形喷射通道的混合性能。结果表明，两个入口流的缠结被削弱为顶部空间高度的增加，并且不稳吞噬流动消失为ħ / ħ ≥0.3。出口长宽比影响腔室内吞噬流的演变，不稳定的吞噬流随着W /消失。w达到8。此外，无论反应器深度增加到w / h = 2还是减小到w / h = 0.5 ，两条入口流的吞噬都会减少，并且不稳定的吞吐流量会消失。