前言流体的分配和汇集是工业上应用得十分广泛的一门学科,进行分配和汇集的代表性装置是管屏。管屏一般是由分配集箱、汇集集箱和管系组成。流体在分配集箱中依次被分配到管系中,并受到加热或冷却后,再依次汇集到汇集集箱,由于管系采用较小节距排列布置,故在集箱中分配或汇集的特点是较为接近的。管屏在机械工业中被广泛应用于热交换 Introduction The distribution and collection of fluids is a widely applied subject in industry. The representative device for distribution and aggregation is the tube screen. The tube screen is generally composed of a distribution header, a collection header and a piping system. The fluid in the distribution header is sequentially distributed to the pipe system, and after being heated or cooled, and then in turn converged to the collection header, due to the piping arranged in a smaller pitch arrangement, so in the header distribution or collection features Is closer. Tube screen in the machinery industry is widely used in heat exchange