How is Lcr determined when calculating the tube sheet?
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Did they ask me to look at the diagram when checking GB151? I’ve been looking at it for a long time but don’t understand how to determine it – what exactly do those letters on the diagram represent in terms of length? Is it related to the distance from the baffle? Thank you to that expert for the guidance!
There are many discussions on the forum regarding the calculation of the equivalent length for pressure-induced instability of heat exchange tubes; take a look: http://bbs.hcbbs.com/viewthread.php?tid=363719&highlight=%B5%B1%C1%BF%B3%A4%B6%C8 http://bbs.hcbbs.com/viewthread.php?tid=35942&highlight=%B5%B1%C1%BF%B3%A4%B6%C8 http://bbs.hcbbs.com/viewthread.php?tid=40183&highlight=%B5%B1%C1%BF%B3%A4%B6%C8
The equivalent length for the pressure-induced instability of the heat exchange tubes depends on the arrangement of the baffle plates, support plates, and tube sheets; you can determine it by referring to the tables in GB151 based on the structure of your heat exchanger.
Come and take a look here; back then this problem also troubled me, but netizens helped me solve it. http://bbs.hcbbs.com/thread-437511-1-1.html