Calculations
Recommendations
Celerity in pipes filled with waterEstimated time for manual use of gate valvesEstimated time of manual closureParmakian's curvesWilke's multicomponent equationMichaud's formula
Input data
Initial head on the valve (H)
Length
Average velocity in permanent regime
Celerity
Time to close the valve
Output data
Maximum transient head at the valve
Minimum transient head at the valve
Maximum transient head at midway
Minimum transient head at midway
Description
Given the basic characteristics of a pressurized gravity conduction line (extension, celerity), permanent regime (water velocity) and valve (closure time, assumed linear), estimates the extreme transient heads that will occur at the valve and at midway.
This method is applied to closing valve time equal or superior to $10\cdot \frac{L}{a}$, with $L$ been the extension and $a$ is the celerity.
pressurized gravity conduction line
References
- VIANNA, Marcos R. Golpe de aríete em adutora - edição eletrônica. Belo Horizonte: Bloom, 2021.