Calibration characteristics of a three-hole probe and a static tube in wetsteam

Total pressure tubes, yawmeters and static probes can be used for measureme nts in droplet laden flows, e.g., mists and wet steam. But to be successful it is important when calibrating the instruments that the characteristics of the droplets be satisfactorily matched. Water droplets formed by nucleat ion in the wet stages of steam turbines are very small and difficult to rep roduce under steady flow conditions. To produce wet steam with realistic dr oplet sizes requires a supply of supercooled steam which can be created und er blow-down conditions by the equipment employed. The calibration characte ristics of a three-hole probe and a static tube in superheated and in wet s team are presented. (C) 2001 Elsevier Science Inc. All rights reserved.