Author(s)

E. Krepper & H-M. Prasser

Abstract

In the Forschungszentrum Rossendorf a measurement techniques test loop was constructed. Air was injected into an upward vertical water flow at normal con- ditions applying different injection modes. The annular test section had a diameter of about 50 mm and a length of about 4 m. The air water flow was investigated us- ing different two phase flow measuring techniques. Different tests with different relations of air and water superficial velocity were performed. For each test sta- tionary conditions were settled. Applying a wire mesh sensor, developed in FZR, the cross section of the void fraction could be determined. The time resolution achieved by the signal process- ing unit is 1024 frames per second. The spatial resolution equals 3 mm. At the in- vestigated flow velocities, the bubble diameter distributio

Keywords