An insight derived from <scp>CFD</scp> investigation on the regulation of vortex flow in jet impact negative pressure reactors: <scp>VG</scp> baffle structure

Abstract The jet impact negative pressure reactor (JI‐NPR) is capable of achieving high efficiency and energy savings through continuous ammonia removal. A large number of multi‐scale vortex structures appear during the evolution of porous jet impingement under negative pressure conditions. The mixed model of mixture and the turbulence model of rsealizable k ‐ ε were used to simulate the flow field and vortex in the reactor. Firstly, the most suitable method to describe the multi‐scale vortex structure is determined. Next, the vortex core and other flow structures were modulated by configuring the spoiler elements. Specifically, the influence of parameters, including the quantity of spoiler elements (baffles), radial distances, and wing widths, on the turbulent flow field were investigated. Finally, the response surface method was used to construct the regression model equations for pressure drop and homogeneity. It is demonstrated that the Ω‐criterion offers a more accurate identification of the flow field inside the JI‐NPR. The baffle structure is conducive to reducing energy dissipation, destabilizing the flow field structure, and improving the interphase flow transfer efficiency. The relevant regression equations and optimal structural parameters are also determined. The present study can provide the foundation for the optimization of the geometry design of the JI‐NPR.