Abstract
It is well known that steam wetness sometimes causes measurement errors of steam flow meter. However, it is difficult to clarify a particular error quantitatively in actual plants or factories, and thus far, there has been no established method for estimating the error caused by steam wetness. Morita et al. conducted experiments for flow rate measurement under wet steam flow with 3 types of the steam flow meter; orifice, vortex and ultrasonic flow meter, and proposed correction methods for measurement error. This paper introduces evaluation of flow regime under wet steam flow by visual observation for considering the effect of flow pattern on the measurement error.
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