Question
Download Solution PDFFor the different orifices, depending on the shape and size of orifice and the head under which flow takes place, The value of Coefficient of velocity Cv is varies from
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFExplanation:
Coefficient of velocity:
- It is defined as the ratio of the actual velocity of the jet at veena contracta V to the theoretical velocity Vth
Experimentally it is determined by using the following relation
\(C_{v}= \sqrt{\frac{x^{2}}{4yH}}\)
where x= Horizontal distance
y= vertical distance
H= constant headwater
Generally, the value of Cy varies from 0.95 to .99 for different orifices depending upon their size, shape, head etc.
for sharp-edged orifices, the value of Cy is 0.98.
| Types of tubes | Cc | Cv |
| Rounded | 1 | 0.98 |
| Sharp-edged | 0.62 | 0.98 |
| Short tube | 1 | 0.8 |
| Borda tube | 0.52 | 0.98 |
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