关键词: 管壳式换热器 , 折流板开孔 , 数值模拟 , 换热系数 , 壳程压降

Abstract: The traditional baffle heat exchanger is widely used for its simple structure, safety and reliability and adaptability advantages, but the traditional baffle heat exchanger has many weaknesses:its thermal efficiency is low, shell side pressure loss is bigger and easy scaling.It is a very important engineering significance through improving the vertical baffles' structure to ameliorate the shell and tube heat exchanger's flow and heat transfer condition of shell side and reduce its energy dissipation.Baffle opening to improve the structure of a gap 0.2D height was studied by numerical simulation method. The velocity field and temperature field numerically simulated ordinary baffles heat exchanger and baffle opening heat exchanger. Under the condition of the same entering velocity of shell side, the thermal effect of baffle opening heat exchanger is better than ordinary vertical baffle plate heat exchanger.And when the entering velocity of shell side is slow, the effect is better.

Key words: Shellandtube heat exchanger , Baffle opening , Numerical simulation , Coefficient of heat transfer , Shell side pressure drop