โก Restriction Orifice Sizer
Size thick-plate single or multi-hole restriction orifices (ISO 5167 / Crane TP410) for permanent pressure dissipation and cavitation check.
โก Fortran 90 Engine
Double Precision (IEEE 754)
โ ISO / ASME Validated
Fluid Mechanics
๐ Solver Telemetry
โ ACTIVE
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28
โก Solves
23
๐พ Downloads
465
๐ฆ Fortran Code
4.4 KB
๐
Released
Jun 2026
โฑ๏ธ Latency
< 1 ms
โก Thick-Plate Restriction Orifice Jet & Pressure Recovery
Real-time visual simulation of vena contracta jet contraction & permanent head loss๐ Configuration & Presets
๐ง Pump Recirc (ฮP=20 bar)
๐ฅ Fuel Gas (ฮP=2.5 bar)
โ๏ธ Chilled Water (ฮP=1.2 bar)
โจ๏ธ Multi-Hole Blowdown (55 bar)
Restriction Orifice Formulations:
โข Permanent Loss Ratio: ฮPperm / ฮPo = 1 โ ฮฒ1.9
โข Orifice Flow: Q = Cd ยท Ao ยท โ[ (2 ฮPo) / ฯ ] / โ(1 โ ฮฒโด)
โข Cavitation Index: ฯ = (Pโ โ Pv) / ฮPperm
โข Plate Thickness: tmin = do ยท โ[ (3 ฮP) / (4 Sallow) ]
โข Permanent Loss Ratio: ฮPperm / ฮPo = 1 โ ฮฒ1.9
โข Orifice Flow: Q = Cd ยท Ao ยท โ[ (2 ฮPo) / ฯ ] / โ(1 โ ฮฒโด)
โข Cavitation Index: ฯ = (Pโ โ Pv) / ฮPperm
โข Plate Thickness: tmin = do ยท โ[ (3 ฮP) / (4 Sallow) ]
๐ Restriction Sizing Results
Configure inputs and click Compute to view results.
๐ Calculation Methodology & Crane TP410 Standards
Permanent Pressure Loss Recovery
Unlike flowmeter orifices, restriction orifices are sized for permanent non-recoverable pressure dissipation based on Crane TP410 loss ratio:
ฮPperm / ฮPo = 1 โ ฮฒ1.9
Cavitation Index & Multi-Hole Plates
When $\sigma < 1.5$, severe cavitation erosion risks arise. Splitting the flow across multiple small holes or multi-stage plates elevates cavitation resistance.
Key Engineering Assumptions
- Square-edged thick restriction orifice plate ($t \ge 0.05 D$).
- Discharge coefficient $C_d = 0.62$ in high Reynolds turbulent flow.
- Stainless steel 316 / Monel plate bending stress limit per ASME Section VIII.