中国激光, 2009, 36 (s1): 265, 网络出版: 2009-06-18  

激光散射干度传感器测量的数据处理方法的研究

Study about Data Processing of the Measurement of Laser Scattering Wetness Sensor
作者单位
吉林大学 电子科学与工程学院, 吉林 长春 130012
摘要
主要研究利用激光散射干度传感器对火力发电站汽轮机末级蒸汽干度测量的数据处理方法。首先, 利用Mie散射理论的结果计算出的水蒸气的相函数, 通过查表并进行反演拟合得出汽轮机末级液态水滴的众数半径; 接着根据蒸汽凝水粒子尺度的广义Gamma分布, 利用前面所求的液态水滴众数半径和相关的谱参数来计算液态水的含量; 然后利用汽轮机中的压力传感器和温度传感器所测得的汽轮机内部的蒸汽压力和温度, 通过理想气体状态方程计算出干蒸汽的含量; 最后利用所得液态水的含量和干蒸汽含量根据蒸汽干度的定义计算出了出汽轮机末级的蒸汽干度值。
Abstract
Using the laser scattering wetness sensor, the data processing method of turbine last stage wetness measuring in the thermal power station has been researched. Firstly, we calculate the results of the vapor phase function using Mie scattering theory, and get the most probable radius of liquid water droplets at the end-turbine by the method of the look-up table and inversion fitting; Then according to the generalized Gamma distribution of the steam condensation water under the particle size, using the most probable radius of liquid water droplets we get before and using some related spectrum parameters to calculate the of liquid water content at the end-turbine; then using the pressure and temperature in the steam turbine and according to the ideal gas equation to calculate the dry steam content, the temperature and pressure is measured by temperature sensor and pressure sensor in the turbine; At the end, use the liquid water content, dry steam content and the definition of dryness fraction to calculate the dryness fraction at end-turbine.

何贵振, 刘海波, 梅程强, 周慧敏. 激光散射干度传感器测量的数据处理方法的研究[J]. 中国激光, 2009, 36(s1): 265. He Guizhen, Liu Haibo, Mei Chengqiang, Zhou Huimin. Study about Data Processing of the Measurement of Laser Scattering Wetness Sensor[J]. Chinese Journal of Lasers, 2009, 36(s1): 265.

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