| 基于CFD数值计算的中速磨煤机进口风量测点选择 |
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| 引用本文： | 王佳茗,阎维平,李学颜,徐程宏. 基于CFD数值计算的中速磨煤机进口风量测点选择[J]. 电力建设, 2011, 32(1): 1-4. DOI: 10.3969/j.issn.1000-7229.2011.01.001 |
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| 作者姓名： | 王佳茗 阎维平 李学颜 徐程宏 |
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| 作者单位： | 1. 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
2. 广东电网公司电力科学研究院,广州市,510600 |
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| 基金项目： | 国家高技术研究发展计划(863计划) |
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| 摘 要： | 针对火电厂燃煤锅炉直吹式制粉系统中速磨煤机进口一次风量测量偏差大这一问题,采用计算流体力学(computational fluid dynamics,CFD)软件对一次风管内流场进行了数值模拟.将计算流量与实际运行中测定流量进行了比较,发现一次风管在,"八"字形调风挡板开度较小时会产生扁平射流随机附壁现象,这使下游流场...
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| 关 键 词： | 火电厂 燃煤锅炉 中速磨煤机 一次风量测量 数值模拟 附壁效应 |
| 收稿时间： | 2010-08-24 |
| 修稿时间： | 2010-08-01 |
Measurement Position Selection of Inlet Primary Air Flow Rate for Vertical-shaft Mill Based on CFD Simulation |
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| WANG Jiaming,YAN Weiping,LI Xueyan,XU Chenghong. Measurement Position Selection of Inlet Primary Air Flow Rate for Vertical-shaft Mill Based on CFD Simulation[J]. Electric Power Construction, 2011, 32(1): 1-4. DOI: 10.3969/j.issn.1000-7229.2011.01.001 |
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| Authors: | WANG Jiaming YAN Weiping LI Xueyan XU Chenghong |
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| Affiliation: | 1.Key Laboratory of Condition Monitoring and Control for Power Plant Equipment(North China Electric Power University),Ministry of Education,Baoding 071003,Hebei Province,China;2.Electric Power Research Institute of Guangdong Power Grid Corporation,Guangzhou 510600,China) |
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| Abstract: | To address the measurement deviation of primary air flow rate at vertical-shaft mill entrance in direct-fired system for coal-fired power plant, the computational fluid dynamics (CFD) software is used to simulate the flow field in primary air duct. The computed flow rate is compared with the measured values, which indicates that the small aperture of symmetrical damper will produce flat fluidic wall-attachment phenomena and makes downstream flow field uncertain and badly stratified, so random arrangement of measuring points cannot reflect the actual flow reasonably. It is proposed to choose the appropriate position for flow measurement based on the CFD simulated results. |
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| Keywords: | power plant coal-fired boiler vertical-shaft mill primary air flow measurement simulation coanda effect |
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