CAJ | 학술논문

根据气溶胶颗粒拟流体性质提出了气液交叉流界面捕集PM2.5的传质类比模型。分析了颗粒Schmidt数及其指数m对气溶胶流体传热传质类比的影响机理。以常用的横掠错排管束对流传热Nu方程为基础，导出了横掠错排降膜阵列PM2.5传质Sherwood数方程，由此建立了以m为模型参数的PM2.5捕集效率预测模型。用横掠20列×90排?3 mm降膜阵列PM2.5捕集效率实测数据回归获得m值为0.808。在Reynolds数50～650的范围内，模型预测传质Sh与实测值误差在±20%之内。
근거기용효과립의류체성질제출료기액교차류계면포집PM2.5적전질류비모형。분석료과립Schmidt수급기지수m대기용효류체전열전질류비적영향궤리。이상용적횡략착배관속대류전열Nu방정위기출，도출료횡략착배강막진렬PM2.5전질Sherwood수방정，유차건립료이m위모형삼수적PM2.5포집효솔예측모형。용횡략20렬×90배?3 mm강막진렬PM2.5포집효솔실측수거회귀획득m치위0.808。재Reynolds수50～650적범위내，모형예측전질Sh여실측치오차재±20%지내。
According to the pseudo-homogeneous fluid performance of aerosol particles, a mass transfer analogy model was proposed for PM2.5 collection on the interface of gas-liquid cross flow. With the mechanism analysis on the particle transport behavior analogized to fluid convective heat transfer, which is mainly affected by the Schmidt number(Sc) and its exponentm, an analogous equation of Sherwood number (Sh) of particle transfer was derived for PM2.5 collection through a staggered falling film array (SFFA), based on a widely used equation of Nusselt number (Nu) of convective heat transfer over the staggered tube bundles. From the analogous equation of Sh, a model for prediction of PM2.5 collection efficiency was deduced with the exponentm as the model parameter. The value ofm was obtained to be 0.808via regression analysis of experimental data of PM2.5 collection efficiencies measured in a SFFA consisting of 20 (line)×90 (row) falling film cylinders with diameter of 3 mm. In the range of Reynolds number from 50 to 650, the deviation between the model prediction of PM2.5 mass transferSh and the experimental data is within±20%.