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Velocity Characteristics around Short Continuous Helical Baffles Using PIV With and Without One Inner Tube

저자
장태현
게재저널
International Journal of Modern Studies in Mechanical Engineering (IJMSME) Volume 3, Issue 2, 2017, PP 31-39
키워드
Helical baffle plate, Particle image velocimetry , Swirling flow , Shell and tube heat exchanger
개요

Usually  the  shell  and  tube  heat  exchangers  are  used  to  recover  the energy  between  fluids.  Recently, a lot of papers are published about these kinds of  heat exchangers, but it isvery seldom to describe local velocity profiles or to compare the features of flowing with or without inner tubes in a horizontal circular tube.

Particle image velocimetry (PIV) method and a commercial program are employed to   measure or to calculate the velocity profiles in the flow around continuous helical baffles. The results show          that swirling flow is produced at the entry, between the helical baffle plates and the outlet of the baffles.  The tangential components are so strong between the two helical baffles but the values of the axial or radial velocities components are very small along the distance.

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