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传统弓形折流板换热器壳程流体横向流动时存在流动阻力和传热死区大等缺点。为克服上述不足,研究开发了一种新型高效节能的斜向流管壳式换热器,采用导向型折流栅替代传统弓形折流板,倾斜流道内流体斜向冲刷换热管束。考察和对比了斜向流换热器和弓形折流板换热器壳程主流区的流体流速分布和变化规律,证实了导向型折流栅具有显著的控涡均化壳程流场和提高壳程流体整体流速的作用,有助于减小壳程压降,增大有效换热面积,为管壳式换热器结构改良提供了参考依据。
The traditional bow-shaped baffle heat exchanger shell-side flow of fluid flow resistance and heat transfer dead zone large shortcomings. In order to overcome the above shortcomings, a new type of highly efficient and energy-saving diagonal flow tube-shell heat exchanger has been developed. Instead of the traditional bow-shaped baffle, the guide baffle is used to obliquely flush the heat transfer tube bundle. The distribution and variation of fluid velocity in the mainstream of the shell of the baffle heat exchanger and bow baffle heat exchanger are investigated and compared. The results show that the baffled baffled gate has a significant control vortex-homogenization shell flow field and increase The overall flow velocity of the shell-side fluid helps to reduce the pressure drop in the shell side and increase the effective heat exchange area, which provides a reference for structural improvement of the shell-and-tube heat exchanger.