ESDU 05024
Flow through sudden contractions of duct area: pressure losses and flow characteristics.
Abstract:
This Item, which supersedes ESDU 01016, provides information on pressure loss and flow characteristics in flow of Newtonian fluids through a sudden contraction of duct area. Both incompressible and compressible flows are covered and data are presented for sharp-, chamfer- and round-edged contractions. The data may be applied also to a simple duct entry from a large space. The information is given here in graphical and equation format. The methods are also implemented in computer program ESDUpac A0116.Indexed under:
- Choking Conditions in Duct Flow
- Kinetic Energy Factor
- Pipes with Internal Flow
- Sudden Contractions in Ducts
- Velocity Profile
Details:
Data Item ESDU 05024 | |
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This Data Item is complemented by the following software:
Name | Details | ||||
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ESDUpac A0116 |
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This Data Item contains 54 interactive graph(s) as listed below.
Graph | Title |
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Figure 1 | Continuity-mean total-pressure loss coefficient for incompressible flow through sharp-edged sudden contractions |
Figure 2 | Continuity-mean total-pressure loss coefficient for incompressible flow through sharp-edged contractions |
Figure 3 | Mass-flow-weighted mean-total-pressure loss coefficient for incompressible flow through sharp-edged sudden contractions |
Figure 4 | Mass-flow-weighted mean-total-pressure loss coefficient for incompressible flow through sharp-edged sudden contractions |
Figure 5a | Continuity-mean round-edge factor at Re2 = 104 |
Figure 5b | Continuity-mean round-edge factor at Re2 = 105 |
Figure 5c | Continuity-mean round-edge factor at Re2 = 107 |
Figure 6a | Continuity-mean round-edge factor at Re2 = 104 |
Figure 6b | Continuity-mean round-edge factor at Re2 = 105 |
Figure 6c | Continuity-mean round-edge factor at Re2 = 107 |
Figure 7a | Mass-flow-weighted round-edge factor at Re2 = 104 |
Figure 7b | Mass-flow-weighted round-edge factor at Re2 = 105 |
Figure 7c | Mass-flow-weighted round-edge factor at Re2 = 107 |
Figure 8a | Mass-flow-weighted round-edge factor at Re2 = 104 |
Figure 8b | Mass-flow-weighted round-edge factor at Re2 = 105 |
Figure 8c | Mass-flow-weighted round-edge factor at Re2 = 107 |
Figure 9a | Continuity-mean chamfer-edge factor at A2/A1 = 0 (see Table 7.1 for description of flow classes) |
Figure 9b | Continuity-mean chamfer-edge factor at A2/A1 = 0.3 (see Table 7.1 for description of flow classes) |
Figure 9c | Continuity-mean chamfer-edge factor at A2/A1 = 0.6 (see Table 7.1 for description of flow classes) |
Figure 10a | Continuity-mean chamfer-edge factor at φ = 36° |
Figure 10b | Continuity-mean chamfer-edge factor at φ = 45° |
Figure 11a | Continuity-mean chamfer-edge factor at φ = 30° |
Figure 11b | Continuity-mean chamfer-edge factor at φ = 45° |
Figure 12a | Mass-flow-weighted chamfer-edge factor at A2/A1 = 0 (see Table 7.1 for description of flow classes) |
Figure 12b | Mass-flow-weighted chamfer-edge factor at A2/A1 = 0.3 (see Table 7.1 for description of flow classes) |
Figure 12c | Mass-flow-weighted chamfer-edge factor at A2/A1 = 0.6 (see Table 7.1 for description of flow classes) |
Figure 13a | Mass-flow-weighted chamfer-edge factor at φ = 30° |
Figure 13b | Mass-flow-weighted chamfer-edge factor at φ = 45° |
Figure 14a | Mass-flow-weighted chamfer-edge factor at φ = 30° |
Figure 14b | Mass-flow-weighted chamfer-edge factor at φ = 45° |
Figure 15a | Re correlation to continuity-mean chamfer-edge factor at Re2 = 104 (see Table 7.1 for description of flow classes) |
Figure 15b | Re correlation to continuity-mean chamfer-edge factor at Re2 = 105 (see Table 7.1 for description of flow classes) |
Figure 15c | Re correction to continuity-mean chamfer-edge factor at Re2 = 107 (see Table 7.1 for description of flow classes) |
Figure 16a | Re correlation to continuity-mean chamfer-edge factor at φ = 30° |
Figure 16b | Re correction to continuity-mean chamfer-edge factor at φ = 45° |
Figure 17a | Re correction to mass-flow-weighted chamfer-edge factor at Re2 = 104 (see Table 7.1 for description of flow classes) |
Figure 17b | Re correction to mass-flow-weighted chamfer-edge factor at Re2 = 105 (see Table 7.1 for description of flow classes) |
Figure 17c | Re correction to mass-flow-weighted chamfer-edge factor at Re2 = 107 (see Table 7.1 for description of flow classes) |
Figure 18a | Re correction to mass-flow-weighted chamfer-edge factor at φ = 30° |
Figure 18b | Re correction to mass-flow-weighted chamfer-edge factor at φ = 45° |
Figure 19 | Upstream separation length for flow through sharp-edged sudden contractions |
Figure 20 | Upstream separation height for flow through sharp-edged sudden contractions |
Figure 21 | Downstream separation length for flow through sharp-edged sudden contractions |
Figure 22 | Downstream separation height for flow through sharp-edged sudden contractions |
Figure 23 | Vena contracta axial location for flow through sharp-edged sudden contractions |
Figure 24 | Downstream recovery length for flow through sharp-edged sudden contractions |
Figure 25 | Specific kinetic-energy profile factor at different Reynolds number |
Figure 26a | Minimum static pressure coefficient for A2/A1 = 0 |
Figure 26b | Minimum static pressure coefficient for A2/A1 = 0.3 |
Figure 26c | Minimum static pressure coefficient for A2/A1 = 0.6 |
Figure Appendix B1 | Static-pressure loss coefficient for flow through sharp-edged sudden contractions |
Figure Appendix B2 | Static-pressure loss coefficient for flow through sharp-edged sudden contractions |
Figure Appendix B3 | Area-averaged total-pressure loss coefficient for flow through sharp-edged sudden contractions |
Figure Appendix B4 | Momentum and kinetic energy factors JM and JKE for fully-developed, turbulent incompressible flow |