| 基于熵产理论的离心风机性能优化 |
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| 引用本文： | 王松岭,张磊,叶学民,吴正人.基于熵产理论的离心风机性能优化[J].中国电机工程学报,2011,31(11). |
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| 作者姓名： | 王松岭 张磊 叶学民 吴正人 |
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| 作者单位： | 电站设备状态监测与控制教育部重点实验室(华北电力大学),河北省,保定市,071003 |
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| 基金项目： | 中央高校基本科研业务费专项资金资助项目(09QX67)~~ |
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| 摘 要： | 基于三维椭圆形控制方程及熵理论,对电厂常用的G4-73型后向式离心风机进行数值模拟及熵产计算,并进行了实验验证.研究发现,叶轮体内熵产最大,且湍流耗散为风机熵产的主要来源,黏性耗散所引起的熵产几乎可以忽略.采用优化理论对叶轮参数进行优化,并分析比较优化前后的风机熵产及动力学特征.结果表明,优化后叶轮和蜗壳内熵产明显降低,流动得到改善;风机的全压升高、高效区拓宽,且流量越大,全压增长的幅值越大.最高效率点附近,风机全压和效率分别提高68 Pa和0.5个百分点.叶轮结构参数的优化对电厂的节能增效、解决风压不足和CO2减排等关键问题具有重要的现实意义.
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| 关 键 词： | 离心风机 熵产 数值模拟 优化 |
Performance Optimization of Centrifugal Fan Based on Entropy Generation Theory |
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| WANG Songling
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ZHANG Lei
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YE Xuemin
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WU Zhengren.Performance Optimization of Centrifugal Fan Based on Entropy Generation Theory[J].Proceedings of the CSEE,2011,31(11). |
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| Authors: | WANG Songling ZHANG Lei YE Xuemin WU Zhengren |
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| Affiliation: | WANG Songling,ZHANG Lei,YE Xuemin,WU Zhengren(Ministry of Education Key Laboratory of Condition Monitoring and Control for Power Plant Equipment(North China Electric Power University),Baoding 071003,Hebei Province,China) |
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| Abstract: | The G4-73 backward-inclined centrifugal fan was numerically simulated using three-dimensional elliptic governing equations and entropy theory to calculate the characteristics of flow field and entropy generation.Numerical model was validated by experimental results.The results show that entropy generation at impeller is the most in the fan,and mainly caused by turbulent dissipation,while the entropy generation caused by viscous dissipation can nearly be ignored.Impeller structural parameters were optimized,... |
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| Keywords: | centrifugal fan entropy generation numerical simulation optimization |
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