EXPERIMENTAL INVESTIGATION OF THE MIXING
PERFORMANCE OF A LOBED JET FLOW

Amina Meslem, Ilinca Nastase,
and Kamel Abed-Meraim

UDC 532.525.2:517.4

An experimental investigation of flow in a turbulent isothermal 
air lobed jet is presented. A lobed jet is compared, in the near field, 
with an isothermal axisymmetric jet with the same exit Reynolds number 
in terms of dynamics and mixing enhancement. It was found that the 
streamwise variation of the volumetric flow rate is characterized 
by a slope is more than twice larger than that for the reference circular 
jet. This high entrainment rate is governed, at the same time, by 
the turbulent structures generated by the asymmetric shape of the 
nozzle and by the high convection in these structures induced by the 
inner and outer penetration angles of their lobes.

LEPTAB, Université de La Rochelle, Avenue Michel Crépeau, 
17042 La Rochelle, Cedex 01, France; email: inastase@univ-lr.fr. Original 
article submitted September 15, 2006. Published in Inzhenerno-Fizicheskii 
Zhurnal, Vol. 81, No. 1, pp. 102-107, February-March, 2008.