一、前言在现代的热交换设备中,增强对流换热一般可采用增加流体流速的方法,但增加流速不仅受到气体阻力因素的限制,而且当气体含有的灰分较多时,将磨损受热面。同时在传热系 I. INTRODUCTION In modern heat exchange equipment, increasing the convective heat transfer generally can be used to increase the fluid velocity. However, increasing the fluid velocity is not only limited by the gas resistance factor, but also when the gas contains more ash, the heated surface will be worn. At the same time in the heat transfer system