Numerical Simulation and Optimization Design of a Gas Mixer
A new type of gas mixer with small volume and low pressure drop was designed to realize homogeneous mixing.The flow field distribution and mixing nonuniformity of the gas mixer with and without baffles were studied by numerical simulation.There was only one vortex region in the mixer without baffles,but two vortex zones in the mixer with baffles.For the gas mixer with and without baffles,the mixing nonuniformities were 0.053 6 and 0.045 7,the total air pressure drops were 960 Pa and 1 109 Pa,and the pressure differences between air inlet and gas inlet were 1 164 Pa and 1 143 Pa,respectively.Owing to the baffles,the overall pressure drop increased about 150 Pa,and mixing nonuniformity was small enough to achieve the desirable mixing effect.For the mixer with baffles,the pressure drop increased significantly with the increase of the air flow rate,and the mixing nonuniformity decreased first and then increased with the increase of the air flow rate.The gas flow rate had little influence on the pressure drop and mixing effect.
Gas mixerNumerical simulationOptimized designMixing nonuniformity
万方数据
维普
