Aimming at a two-dimensional lobed forced mixer with an internal central cone, a series of model experiments are performed to investigate the mixing and combustion performance on an experi-metal setup simulating the afterburner, and the experimental results are compared with that of a conventional mixer.The results show that the lobed forced mixer makes the distribution of tatal pressure and total temperature of the mixing flow between the primary stream and the bypass stream tend to be uniform along the passage height direction.The total pressure loss produced by the lobed forced mixer is a little bigger than that by the conventional mixer.By using the lobed forced mixer, the combustion efficiency is increased approximately 10% related to the conventional mixer under the same fuel-air ratio.It is also revealed that the lobed forced mixer is benefit for improving the igniting and combustion stability.