激光后向散射法在测量湿蒸气中的应用研究

为了研究测量汽轮机内部湿蒸气特性，采用了基于后向激光散射法的测量新方法，得到不同角度不同位置湿蒸气散射光强度数据，从而得出湿蒸气相关参量，并求得湿蒸气水滴质量中间半径为1μm左右。结果表明，无湿蒸气时的空白数据对湿蒸气方法也有影响，需要修正公式；无论有无湿蒸气，30°的散射光光强均为60°的散射光光强的1.5倍左右，30°的散射光更明显适于测量。这一结果说明激光后向散射原理测量湿蒸气是可行的。

Application of laser backscattering method in wet steam measurement

In order to study the characteristics of the wet steam in steam turbine unit, the new measurement method based on laser backscattering method was proposed to get the data of scattering light intensity of the wet steam at different angles and at different locations. And then, the parameters of the wet steam were gotten and the middle radius of the wet steam droplets quality was about 1μm. The results show that the blank data of none wet steam also has the impact on the wet steam method, so the formula should be corrected. And no matter there is the wet steam or not, the scattered light intensity at 30° is about 1.5 times of the scattering light intensity at 60°, so the scattered light at 30° is more suitable for measurement. The results show that the backscattering theory is feasible for wet steam measurement.