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 roundedged 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  

Format: 

Status: 

Previous Releases:  
ISBN: 

The Data Item document you have requested is available only to subscribers or purchasers.
 Subscribers login here.
 If you are not an ESDU subscriber you can
 find out how to subscribe, or
 purchase this Data Item from the IHS Standards Store.
This Data Item is complemented by the following software:
Name  Details  

ESDUpac A0116 
This program is only available to subscribers. 
The graphs listed below are available only to subscribers.
 Subscribers login here.
 If you are not an ESDU subscriber find out how to subscribe.
This Data Item contains 54 interactive graph(s) as listed below.
Graph  Title 

Figure 1  Continuitymean totalpressure loss coefficient for incompressible flow through sharpedged sudden contractions 
Figure 2  Continuitymean totalpressure loss coefficient for incompressible flow through sharpedged contractions 
Figure 3  Massflowweighted meantotalpressure loss coefficient for incompressible flow through sharpedged sudden contractions 
Figure 4  Massflowweighted meantotalpressure loss coefficient for incompressible flow through sharpedged sudden contractions 
Figure 5a  Continuitymean roundedge factor at Re_{2} = 10^{4} 
Figure 5b  Continuitymean roundedge factor at Re_{2} = 10^{5} 
Figure 5c  Continuitymean roundedge factor at Re_{2} = 10^{7} 
Figure 6a  Continuitymean roundedge factor at Re_{2} = 10^{4} 
Figure 6b  Continuitymean roundedge factor at Re_{2} = 10^{5} 
Figure 6c  Continuitymean roundedge factor at Re_{2} = 10^{7} 
Figure 7a  Massflowweighted roundedge factor at Re_{2} = 10^{4} 
Figure 7b  Massflowweighted roundedge factor at Re_{2} = 10^{5} 
Figure 7c  Massflowweighted roundedge factor at Re_{2} = 10^{7} 
Figure 8a  Massflowweighted roundedge factor at Re_{2} = 10^{4} 
Figure 8b  Massflowweighted roundedge factor at Re_{2} = 10^{5} 
Figure 8c  Massflowweighted roundedge factor at Re_{2} = 10^{7} 
Figure 9a  Continuitymean chamferedge factor at A_{2}/A_{1} = 0 (see Table 7.1 for description of flow classes) 
Figure 9b  Continuitymean chamferedge factor at A_{2}/A_{1} = 0.3 (see Table 7.1 for description of flow classes) 
Figure 9c  Continuitymean chamferedge factor at A_{2}/A_{1} = 0.6 (see Table 7.1 for description of flow classes) 
Figure 10a  Continuitymean chamferedge factor at φ = 36° 
Figure 10b  Continuitymean chamferedge factor at φ = 45° 
Figure 11a  Continuitymean chamferedge factor at φ = 30° 
Figure 11b  Continuitymean chamferedge factor at φ = 45° 
Figure 12a  Massflowweighted chamferedge factor at A_{2}/A_{1} = 0 (see Table 7.1 for description of flow classes) 
Figure 12b  Massflowweighted chamferedge factor at A_{2}/A_{1} = 0.3 (see Table 7.1 for description of flow classes) 
Figure 12c  Massflowweighted chamferedge factor at A_{2}/A_{1} = 0.6 (see Table 7.1 for description of flow classes) 
Figure 13a  Massflowweighted chamferedge factor at φ = 30° 
Figure 13b  Massflowweighted chamferedge factor at φ = 45° 
Figure 14a  Massflowweighted chamferedge factor at φ = 30° 
Figure 14b  Massflowweighted chamferedge factor at φ = 45° 
Figure 15a  Re correlation to continuitymean chamferedge factor at Re_{2} = 10^{4} (see Table 7.1 for description of flow classes) 
Figure 15b  Re correlation to continuitymean chamferedge factor at Re_{2} = 10^{5} (see Table 7.1 for description of flow classes) 
Figure 15c  Re correction to continuitymean chamferedge factor at Re_{2} = 10^{7} (see Table 7.1 for description of flow classes) 
Figure 16a  Re correlation to continuitymean chamferedge factor at φ = 30° 
Figure 16b  Re correction to continuitymean chamferedge factor at φ = 45° 
Figure 17a  Re correction to massflowweighted chamferedge factor at Re_{2} = 10^{4} (see Table 7.1 for description of flow classes) 
Figure 17b  Re correction to massflowweighted chamferedge factor at Re_{2} = 10^{5} (see Table 7.1 for description of flow classes) 
Figure 17c  Re correction to massflowweighted chamferedge factor at Re_{2} = 10^{7} (see Table 7.1 for description of flow classes) 
Figure 18a  Re correction to massflowweighted chamferedge factor at φ = 30° 
Figure 18b  Re correction to massflowweighted chamferedge factor at φ = 45° 
Figure 19  Upstream separation length for flow through sharpedged sudden contractions 
Figure 20  Upstream separation height for flow through sharpedged sudden contractions 
Figure 21  Downstream separation length for flow through sharpedged sudden contractions 
Figure 22  Downstream separation height for flow through sharpedged sudden contractions 
Figure 23  Vena contracta axial location for flow through sharpedged sudden contractions 
Figure 24  Downstream recovery length for flow through sharpedged sudden contractions 
Figure 25  Specific kineticenergy profile factor at different Reynolds number 
Figure 26a  Minimum static pressure coefficient for A_{2}/A_{1} = 0 
Figure 26b  Minimum static pressure coefficient for A_{2}/A_{1} = 0.3 
Figure 26c  Minimum static pressure coefficient for A_{2}/A_{1} = 0.6 
Figure Appendix B1  Staticpressure loss coefficient for flow through sharpedged sudden contractions 
Figure Appendix B2  Staticpressure loss coefficient for flow through sharpedged sudden contractions 
Figure Appendix B3  Areaaveraged totalpressure loss coefficient for flow through sharpedged sudden contractions 
Figure Appendix B4  Momentum and kinetic energy factors J_{M} and J_{KE} for fullydeveloped, turbulent incompressible flow 
Explore ESDU
ESDU Series:
 Aerodynamics
 Aircraft Noise
 Composites
 Dynamics
 Fatigue  Endurance Data
 Fatigue  Fracture Mechanics
 Fluid Mechanics, Internal Flow
 Fluid Mechanics, Internal Flow (Aerospace)
 Heat Transfer
 Mechanisms
 Performance
 Physical Data, Chemical Engineering
 Stress and Strength
 Structures
 Transonic Aerodynamics
 Tribology
 Vibration and Acoustic Fatigue
 Wind Engineering
ESDU Packages:
 Home  AZ index  Contact Us  Help  About Us  Terms of Use  Privacy Policy  How we use cookies  How to Subscribe 
© 19992019 IHS ESDU, part of IHS Inc.