Quick Answer
Calculate Joukowsky Surge Pressure Rise Estimator for Water Mains
Calculator
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Find Engineering Solutions →Result Interpretation
Joukowsky Surge Pressure Rise Estimator for Water Mains calculator computes Surge pressure rise in Pa using the defined engineering formula and the input values provided. Surge pressure rise is expressed in Pa. No universal acceptance threshold is defined by this calculator.
Worked Example
Verified calculation
Given:
- Water density = 998.2
- Acoustic wave speed in water-main system = 1200
- Change in flow velocity = 1.5
Expected Result:
- Surge pressure rise = 1796760
Engineering Interpretation:
Under the given input conditions, the calculated result is: Surge pressure rise = 1796760 Pa.
The actual numerical result is computed by the Runtime engine using the persisted tool definition. The values shown here come from automatically validated test cases.
Formula / Method
surge pressure rise = water density * acoustic wave speed in water-main system * change in flow velocityFormula family: formula_utilities_water_main_hydraulic_transient_surge_pressure_rise_estimator_for_pump_startstop_and_valve_closure
Variables
| Symbol | Label | Role | Description |
|---|---|---|---|
| rho | Water density | INPUT | Water density |
| a | Acoustic wave speed in water-main system | INPUT | Acoustic wave speed in water-main system |
| delta_v | Change in flow velocity | INPUT | Change in flow velocity |
| surge_pressure_rise | Surge pressure rise | OUTPUT | Surge pressure rise |
Calculation Steps
- Enter the water density in kg/m^3.
- Enter the acoustic wave speed in water-main system in m/s.
- Enter the change in flow velocity in m/s.
- Step 1: Compute surge pressure rise.
- Read the surge pressure rise (Pa) from the results.
Engineering Summary
Calculate Joukowsky Surge Pressure Rise Estimator for Water Mains
Frequently Asked Questions
What does this calculator calculate?
The Joukowsky Surge Pressure Rise Estimator for Water Mains calculator estimates Surge pressure rise based on the input parameters you provide
Why is water density important in this calculation?
water density is directly proportional to surge pressure rise. When you enter water density in kg/m^3, the calculator uses it in the engineering formula to compute the output
How should I interpret the result surge pressure rise?
The calculator outputs surge pressure rise in Pa. For higher pressures, divide by 1000 to express in kPa, or by 101325 for atmospheres. The result is computed directly from the input values using the defined engineering formula
What units should I use for the inputs?
Enter each value in the units shown next to the input field: Water density (kg/m^3), Acoustic wave speed in water-main system (m/s), Change in flow velocity (m/s). Make sure all inputs use the specified units for consistent results
What assumptions does this calculator use?
This calculator uses automatically validated engineering formulas. Results are approximate and should be validated against site-specific conditions, applicable codes, and professional engineering judgment
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