Optical Measurement of Wet Steam in Turbines

[+] Author and Article Information
N. N. Wang, J. M. Wei, X. S. Cai, Z. W. Zhang, G. Zheng, X. H. Yu

College of power Engineering, University of Shanghai for Science and Technology, 516 Jun Gong Road, Shanghai 200093, P. R. China

J. Eng. Gas Turbines Power 120(4), 867-871 (Oct 01, 1998) (5 pages) doi:10.1115/1.2818480 History: Received March 03, 1997; Online November 19, 2007


The wetness fraction of steam causes dangerous erosion of turbine blades and other components, and decreases efficiency of stages. The instrumentation of wet steam has, therefore, attracted growing interest from the point of safety and economical operation of power stations. Based on the light scattering technique, a method is presented that is capable of measuring the wetness fraction of steam, the mean water droplet diameter as well as their full size distribution. An optical probe has been constructed that can be used in the turbines in operation. Its main characteristic and features are discussed in this paper. Experimental results in a 200 MW condensing steam turbine are also given.

Copyright © 1998 by The American Society of Mechanical Engineers
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