Effect of physical property parameters on critical airflow velocity of a corrugated plate dryer

Abstract

Corrugated plate dryers are important steam-water separation devices in the steam generator of the nuclear power plant. No previous analysis of effect of physical property parameters on critical airflow velocity of corrugated plate dryer has been performed. Therefore, research in this area is innovative and novel. Based on theoretical correlation of the critical airflow velocity proposed in reference (Wang and Tian, 2020); effect of physical property parameters on critical conditions of the liquid film rupture under horizontal shear of airflow is experimentally studied. In the experiment, pure water, 2.5% (mass fraction) butanol, and ethanol are selected as three different liquids, respectively. Thickness of the liquid film on corrugated plate wall is measured by PLIF (Plane Laser Induced Fluorescence) method. Experimental results show that liquid film rupture is related to the stability parameter Kapitza number. The larger the Kapitza number, the better the liquid film stability and the higher the critical airflow velocity.