Tee Junction - Straight Loss

Tee Junction - Straight Loss


Question:

When we model a tee junction, if we turn off the branch pipe, should we have a pressure loss for the straight pipe, ie a straight loss?

Answer:

According to Idelchik, Miller and SAE, the straight losses in the case of the branch connection being turned off is zero. However, for Crane type tees there should be a loss.

The image below shows a test exercise for the exact same model only using the four different tee pressure loss relationships.

As we can see, the Crane method produces a pressure loss for the straight whereas all other methods have a zero results as per the literature. 



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