In order to investigate the influence of the SV static mixer on the mixing and heat transfer of liquid-liquid direct contact boiling heat transfer process,the influence of the aspect ratio of the SV static mixer on the direct contact boiling heat transfer process at the same height was analyzed.A direct contact heat transfer experimental platform was built.The feasibility and accuracy of the numerical simulation results were validated.The results showed that,the error between the experimental results and the simulation results was less than 3％;Compared with the two types of mixers with the aspect ratio of 0.5 and 2.0,the SV static mixer with the aspect ratio of 1.0 had a maximum pressure drop of 18 Pa.Most of the turbulent kinetic energy exceeded 0.002 m2/s2.The volumetric heat transfer coefficient had a maximum increase of 9.7％.Along with the aspect ratio decreased,the pressure drop and volumetric heat transfer coefficient were increased.The optimal aspect ratio for the maximum of turbulent kinetic energy was 1.0.In summary,the proper reduction of the SV mixing element aspect ratio was beneficial to enhance the heat exchange.The results had good guidance for the design of structural parameters of direct contact heat exchanger.
关键词
SV静态混合器/长径比/压力降/湍流动能/容积换热系数/数值模拟/直接接触换热
Key words
SV static mixer/aspect ratio/pressure drop/turbulent kinetic energy/volumetric heat transfer coefficient/numerical simulation/direct contact heat transfer
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