Pressure losses in curved ducts: coils.
Abstract:ESDU 77029 gives a method for calculating the pressure loss for single-phase gas or liquid incompressible Newtonian flow through a coil. By correlating data for friction factor taken from a wide range of sources in the literature, four Reynolds number regimes were identified and defined within each of which an equation for friction factor as a function of Reynolds number and coil diameter/tube diameter ratio was established. Correction factors are provided to take into account variation of fluid properties across the cross-section and variations in surface roughness. The data are strictly applicable to helical coils, but a method of using them for non-helical coils is suggested. Estimates of the accuracy of the prediction are included, and a practical worked example illustrates the use of the data.
|Data Item ESDU 77029|
- Aircraft Noise
- Fatigue - Endurance Data
- Fatigue - Fracture Mechanics
- Fluid Mechanics, Internal Flow
- Fluid Mechanics, Internal Flow (Aerospace)
- Heat Transfer
- Physical Data, Chemical Engineering
- Stress and Strength
- Transonic Aerodynamics
- Vibration and Acoustic Fatigue
- Wind Engineering
Aerospace Materials Data
Additional Engineering References