为快速、准确地预测垃圾焚烧电厂中复杂风管系统内的全三维流场特征和通流特性，结合三维剪切应力输运（SST）数值模型、一维阻力模型和多孔介质模型，建立了复杂通风管路系统的多维耦合数值模拟方法。通过电厂现场测量获取管路流量和压力，验证了数值模拟的准确性，分析了系统通风效果不佳的原因，并对其进行了优化。结果表明：数值计算得到的出口压力、支管流量与现场测量值的最大相对误差不超过10%；现有管路系统不合理的管道布局和大量的分支管路结构是造成当前通流能力不足的原因；优化后管路系统流量分配更为合理，原本不满足风量要求的3个车间的风量分别从总风量的3.6%，1.3%，6.4%提升至34.9%，4.8%，10.1%，均达到电厂运行指标。

In order to predict the full threedimensional (3D) flow field characteristics and its flowresistance features of complex ventilation piping system in a wastetoenergy power plant quickly and accurately,the 3D shear stress transport (SST) turbulence mode,1D loss coefficient model and the porous media model were combined to establish a new numerical model for multidimensional coupling. The accuracy of the numerical simulation was verified by the mass flow rate data and pressure distributions measured at a power plant. The flow characteristics of the system was also analyzed to find out the reason of its poor ventilation,and the whole pipe system was optimized. The validation results demonstrate that our proposed numerical strategy agrees quite well with the measurements and the relative error between outlet pressure,pipe flow rate and measured value is below 10%. Further analysis indicates that the current flowresistance feature is caused by the unreasonable piping distribution and the abundant nonstandard sidebranches. After optimization,the flow distributions of piping system are more reasonable,and the ventilation volumes of the three workshops which originally do not meet the requirements increase from 3.6%,1.3% and 6.4% to 34.9%,4.8% and 10.1% respectively,which all reach the operation indicators of the power plant.

TK16

国家自然科学基金（11802177）；中国博士后科学基金（2018M630439）