ESDU 72011
Flow through a sudden enlargement of area in a duct.
Abstract:
ESDU 72011 provides information on the total-pressure loss and static-pressure recovery for incompressible and subsonic compressible fluid flow through sudden enlargements of area in ducts. Data are given for the subsonic flow of liquids and gases through near symmetrical enlargements with area ratios between 0 and 1 and at Reynolds numbers, based on upstream pipe diameter, greater than 20. The effects of various non-uniform upstream velocity profiles are considered for incompressible flow. Worked examples are provided.Indexed under:
- Borda-Carnot Relationship
- Pressure Drop in Internal Flow
- Pressure Recovery
- Sudden Expansions in Ducts
- Velocity Profile
Details:
| Data Item ESDU 72011 | |
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This Data Item contains 8 interactive graph(s) as listed below.
| Graph | Title |
|---|---|
| Figure 1 | Total-pressure loss coefficient for uniform approach flow at low Reynolds numbers |
| Figure 2 | Total-pressure loss coefficient and static-pressure recovery coefficient for uniform approach flow, Re >4000 |
| Figure 3b | Effect on Kti and (−Ksi) of non-uniform approach flows Re > 4000 |
| Figure 3c | Effect on Kti and (−Ksi) of non-uniform approach flows Re > 4000 |
| Figure 4 | Downstream Mach number for compressible flow through a sudden enlargement for air, γ = 1.4 |
| Figure 5 | Total-pressure loss coefficient for compressible flow through a sudden enlargement for air, γ = 1.4 |
| Figure 6a | Static-pressure ratio across a sudden enlargement for air, γ = 1.4 |
| Figure 6b | Static-pressure ratio across a sudden enlargement for air, γ = 1.4 |