| 谐振腔微扰法测量汽轮机排汽湿度技术的关键问题 |
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| 引用本文： | 韩中合,钱江波,杨昆,刘亚川,孙利.谐振腔微扰法测量汽轮机排汽湿度技术的关键问题[J].动力工程,2005,25(3):387-391. |
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| 作者姓名： | 韩中合 钱江波 杨昆 刘亚川 孙利 |
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| 作者单位： | 1. 华北电力大学,保定,071003
2. 中国国家电力监管委员会,北京,100700 |
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| 摘 要： | 在微波谐振腔微扰测量流动湿蒸汽湿度的方法中,谐振式湿度测量传感器是测量装置的关键部件之一。建立了传感器的高频结构仿真模型和汽液两相流场数值模型,并对谐振式传感器进行了电磁特性和气动特性分析,仿真表明:保证测量精度的关键因素是传感器两端网结构和气流入口处结构形状。对取样误差进行了分析,给出了修正公式。通过仿真,本文优化设计的谐振式湿度测量传感器具有良好的高频电磁性能和气动性能。实际应用取得了良好的效果。图5参12
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| 关 键 词： | 动力机械工程 汽轮机排汽 湿度测量 谐振腔传感器 电磁场 两相流动 模拟仿真 |
| 文章编号： | 1000-6761(2005)03-0387-05 |
Key Problems of Steam Turbine Exhaust Wetness Measurements by the Resonant Cavity Perturbation Method |
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| HAN Zhong-he,QIAN Jiang-Bo,YANG Kun,LIU Ya-chun,SUN Li.Key Problems of Steam Turbine Exhaust Wetness Measurements by the Resonant Cavity Perturbation Method[J].Power Engineering,2005,25(3):387-391. |
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| Authors: | HAN Zhong-he QIAN Jiang-Bo YANG Kun LIU Ya-chun SUN Li |
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| Abstract: | The resonant wetness sensor is one of the key equipment used for measuring the wetness of flowing steam by the microwave cavity perturbation method. A simulation model of the sensor's high frequency component and a numerical model of the steam-water two phase flow has been established, and the electric magnetic, as well as the aerodynamic characteristics of the sensor analyzed. Simulation shows that the web structure at the sensor's two terminals, and that of the flow intake opening, are the critical factors for warranting measurement precision. Sampling errors have been studied and a correction formula is being presented. With the help of simulation, the optimally designed resonant cavity type wetness sensor has acquired good high-frequency electromagnetic as well aerodynamic characteristics. Practical application has shown good results. Figs 5 and refs 12. |
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| Keywords: | power and mechanical engineering turbine's exhaust steam wetness measurement resonant cavity sensor electromagnetic field two phase flow simulation |
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