污染源位置对气体污染物影响的数值模拟

Numerical Simulation of Pollutant Source Position Influencing on Air Pollutant Concentration

在自然通风、置换通风和单侧送侧回式通风3种方式下,通过改变污染源位置,运用CFD软件模拟研究了办公室内苯污染物的浓度分布规律,比较得出最佳通风方式下的最合理污染源位置。结果表明,3种通风方式下污染源放置的最合理位置是点3;苯污染源处于位置3时,3种通风方式中自然通风各平面苯污染物平均浓度普遍相对最高,而单侧送侧回方式的相对最低,置换通风居于二者之间。最终确定单侧送侧回通风方式下污染源处于位置3时为最佳物理模型,在该模型下办公室内通风效果最好,能够有效地排出室内气体污染物。因此,不同污染源位置对办公室内空气品质的影响不同。

CFD software was used to separately simulate and study benzene pollutant concentration distribution in an office under natural ventilation,the replacement ventilation and single side supply side return ventilation by changing the position of pollution source.Proper position of pollution sources and the most reasonable ventilation mode were obtained by analyzing and contrasting.Results showed that the most proper position of pollutant sources was the position 3 under three ventilation modes.When benzene pollutant sources were at position 3,average concentration of benzene of various planes for natural ventilation was relatively the maximum value,while indoor air pollutant concentration was relatively the lowest for single side supply side return mode,and replacement ventilation was between the two ventilation modes.The condition that pollution sources at position 3 under single side supply side return mode was finally determined as the best physical model.Ventilation effect in the office was relatively the best under the model and indoor air pollution could be effectively removed.Different position of pollutant sources could result in the change of air quality in the office.