Effect Of Inlet Pre-Whirl On Two-Dimensional Lobed Mixer Performance

The temperature field downstream the lobed mixer under different pre-whirl conditions was studied by numerical method. The influence of pre-whirl on the mixing performance and total pressure loss was summarized. The results show that large-scale streamwise vortices generated by the lobe structure are the key to the rapid mixing of core and bypass airflow. The inlet pre-whirl will strengthen the interaction between streamwise vortices, thus accelerating the mixing of core and bypass airflow. The mixing efficiency and total pressure loss of the lobed mixer increase with the inlet pre-whirl.