ERROR ANALYSIS BASED DEVELOPMENT OF A BUBBLE VELOCITY-MEASUREMENT CHAIN

In this paper a measurement chain for bubble velocity measurements has been designed, developed and tested. The sensing element used for tes ting is a double fiber optic probe. Error sources associated with the measurement techniques are illustrated by theoretical models. The conc lusions are also valid for other sensing elements used to detect bubbl es in two-phase flow. A special purpose data acquisition and processin g system has been implemented to obtain velocity data from the sensor signals. The system can be used with other kinds of sensing elements. A test bench, suitable for generating horizontal air-water two-phase f lows with well controllable bubble velocity, has been installed in a w ater lest rig in order to test and calibrate the measurement chain usi ng a double fiber optic sensing element. Copyright (C) 1996 Elsevier S cience Ltd.