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1 几何模型和数学模型
Fig. 1 ESP system layout

Fig. 2 Mesh of ESP system

Fig. 3 Grid independence verification

2 物理模型
Fig. 4 Physical model system

3 结果及分析
3.1 进口烟道流场分布及流量分配
Fig. 5 Streamline of inlet duct

Table 1 Flow distribution comparison
位置 | 常规烟风道流量偏差/ % | 流线型烟风道流量偏差/ % | |||||
优化前 | 优化后 | 优化前 | 优化后 | ||||
CFD | 物模 | CFD | 物模 | ||||
左室 | -37.93 | +0.82 | +1.33 | +5.88 | -0.20 | +0.96 | |
中室 | +39.35 | -0.50 | -0.48 | -11.02 | -0.12 | -0.81 | |
右室 | -1.42 | -0.32 | -0.85 | +5.14 | +0.32 | -0.15 |
Fig. 6 Velocity distribution contours in conventional flue gas duct section after optimization
Fig. 6 Velocity distribution contours in conventional flue gas duct section after optimization

Fig. 7 Velocity distribution contours in streamlined shape flue gas duct section after optimization
Fig. 7 Velocity distribution contours in streamlined shape flue gas duct section after optimization

3.2 出口烟风道流场分布
Fig. 8 Streamline of outlet duct

3.3 系统阻力
Fig. 9 Monitoring section along airflow direction

Fig. 10 Curve of pressure variation along airflow direction (Psection 1=0 Pa)
Fig. 10 Curve of pressure variation along airflow direction (Psection 1=0 Pa)

Table 2 Resistance comparison among different layout methods
位置 | 常规烟风道阻力/ Pa | 流线型烟风道阻力/ Pa | ||||
CFD | 物模 | CFD | 物模 | |||
进口烟风道 | 左室 | 132 | 133 | 45 | 41 | |
中室 | 138 | 129 | 47 | 39 | ||
右室 | 137 | 124 | 46 | 40 | ||
低温省煤器 | 329 | 335 | 326 | 310 | ||
出口烟风道 | 左室 | 155 | 186 | 70 | 78 | |
中室 | 152 | 195 | 85 | 87 | ||
右室 | 137 | 182 | 78 | 85 |
Fig. 11 Resistance comparison along inlet duct

Fig. 12 Resistance comparison along outlet duct
