【摘要】 为探究定操作流量下诱导结构设计对旋流反应器气相流场与压降的影响，设计了基于定高宽比原则的不同旋流诱导进口面积（无因次面积分别为0.056,0.098,0.156和0.224），采用雷诺应力湍流模型数值模拟及实验研究的方法分析其内部三维流动的空间分布和压降特性。结果表明，诱导结构面积的变化影响流场对称性和截面速度分布。较小的面积由于具有较大的入射速度，使得流场内各截面上切向速度较大有利于增强旋流强度。进一步发展了切向速度的特征参数与诱导面积及轴向高度的半经验关联式。诱导面积的变化对轴向速度的影响不明显。无因次旋流诱导面积在0.056～0.224范围变化时，表征压降的特征欧拉数从381.2减小到89.4。结果可为旋流反应器的优化设计与运行提供参考。更多还原

【Abstract】 In order to explore the influence of the induced structure design on the gas-phase flow field and pressure drop of the vortex reactor at the same operating flow rate, based on the different swirl induced inlet areas(dimensionless areas are 0.056,0.098,0.156 and 0.224 respectively) under the fixed height-width ratio,the Reynolds stress turbulence model was used for numerical simulation and experimental research to analyze the spatial distribution and pressure drop characteristics of the internal three-dimensional flow.The results show that the change of the induced structure area affects the flow field symmetry and crosssectional velocity distribution.A smaller area has a larger incident velocity,which makes the tangential velocity on each section in the flow field larger,which is favorable to enhance the swirl intensity.The semi-empirical correlation between characteristic parameters of tangential velocity and induced area and axial height was further developed.The change of the induced area has no obvious effect on axial velocity.When the dimensionless swirl induced area varies in the range of 0.056～0.224,the Euler number characterizing the pressure drop decreases from 381.2 to 89.4.The present results can provide a reference for the optimal design and operation of the vortex reactor.更多还原