ANALYSIS OF THE PROCESS OF MIXING
OF A PASSIVE IMPURITY IN A JET MIXER

V. L. Zhdanov,a A. D. Chornyi, b
and É. Hassela 

UDC 532.517.4,532.526.5

The experimental results for two regimes of mixing of 
a passive impurity in an axisymmetric jet mixer - the mixing of 
a turbulent jet and a cocurrent flow to form a recirculation zone 
behind the nozzle and an analogous mixing without the formation of 
a recirculation zone Red = 10,000) - have been presented. 
The velocity field has been measured in the mixer cross sections at 
different distances from the nozzle (0.1 <x/D< 9.1) with 
a one-component Doppler laser anemometer, whereas the scalar field (concentration of the passive impurity) has been diagnosed by the 
laser-induced fluorescence method. Based on the scalar distributions 
obtained, the autocorrelation function and the integral scale have been computed, the form of the probability density function has been restored, 
and the distributions of the asymmetry and excess coefficients have been constructed. Visualization of flow in the mixer has been carried out.

a Fachbereich Maschinenbau und Schiffstechnik, Lerhsthul 
für Technische Thermodynamik, Uviversität Rostok, 2 A. Einstein Str., Rostok, 18059, Deutschland (Germany); b A. V. Luikov 
Heat and Mass Transfer Institute, National Academy of Sciences of 
Belarus, 15 P. Brovka Str., Minsk, 220072, Belarus; email: anchor@hmti.ac.by. 
Translated from Inzhenerno-Fizicheskii Zhurnal, Vol. 80, No. 2, pp. 
46-59, March-April, 2007. Original article submitted July 
15, 2005.