A Novel Method for Measuring the Coarse Water Droplets in Wet Steam Flow in Steam Turbines

Some optical probes based on light extinction have been developed to measure wetness dominated with fime droplets in steam turbine.However,coarse water droplets (hereafter referred to as CWD) that are the main cause of erosion of blade and of wetness loss of steam turbine can't be detented by the extinction probes because of its large size.In this paper,a new method-the light fluctuation method is presented that is capable of measuring the size of CWD.A new probe based on this method was developed for measuring the size of CWD as well as its velocity and concentration.