functionK_conicalConfuser
Gradual Contraction | Conical confuser/nozzle (large -> small area) | Local + friction loss
Extends from TRANSFORM.Icons.Function (Icon for functions).
Information
Resistance coefficient K for a gradual contraction (conical confuser / nozzle) per
Rennels & Hudson (2012), referenced to the velocity head in the smaller (outlet) cross-section, i.e. used as
dp = K*m_flow^2/(2*rho*min(A)^2).
The input angle is the total included cone (convergence) angle. The loss is the sum of a
friction term and a convective term that grows with the convergence parameter lambda.
References
Rennels, D. C. & Hudson, H. M. Pipe Flow: A Practical and Comprehensive Guide. John Wiley & Sons (2012).
Inputs
| Type | Name | Default | Description |
|---|---|---|---|
| SI.Area[2] | crossAreas | {1.0, 0.25} | Cross-sectional areas (order does not matter) |
| SI.ReynoldsNumber | Re | Reynolds number (referenced to the smaller section) | |
| SI.Angle | angle | Total included cone (convergence) angle | |
| SI.Length | roughness | 0 | Average height of surface asperities |
| SI.ReynoldsNumber | Re_lam | 2300 | Laminar transition Reynolds number |
| SI.ReynoldsNumber | Re_turb | 4000 | Turbulent transition Reynolds number |
Outputs
| Type | Name | Default | Description |
|---|---|---|---|
| Units.NonDim | K | Resistance coefficient |