Question
Download Solution PDFThe ratio of the area of the jet at vena-contracta to the area of the orifice, is known as
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Co-efficient of contraction(Cc)
It is the ratio of the area of the jet at vena contracta to the area of orifice,
Cc = Area at vena contracta/Area of orifice
The typical value may be taken as 0.64 for a sharp orifice (concentric with the flow channel). The smaller the value, the more effect the vena contracta has.
Additional Information
Ratio of actual discharge through an orifice to the theoretical discharge is known as coefficient of discharge (Cd).
Ratio of the actual velocity of jet at Vena contracta to the theoretical velocity is known as coefficient of velocity (Cv).
Ratio of loss of head in the orifice to the head of water available at the exit of the orifice is known as coefficient of resistance (Cr).
∴ Coefficient of discharge (Cd) = Cc × CvLast updated on Jun 23, 2025
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