EXPERIMENTAL INVESTIGATION OF THE MIXING PERFORMANCE OF A LOBED JET FLOW

An experimental investigation of a flow in the case of 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 which 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.
Автор:  Amina Meslem, Ilinca Nastase, Kamel Abed-Meraim
Стр:  102