Stator ventilation duct
QuickField simulation example
The air passes through the stator ventilation duct.
Engineering question
How to find air temperature rise in stator ventilation duct?
Engineering answer
Set up an axisymmetric QuickField Steady-state Heat Transfer problem for a stator ventilation duct and evaluate air temperature rise from computed field results.
Typical applications
electric machine ventilation ducts, generator cooling channels, stator ventilation paths
- Download simulation files (files may be viewed using any QuickField Edition).
Problem Type
Axisymmetric problem of heat transfer.
Geometry
D = 30 mm, L = 4000 mm.
Given
Air speed in the duct v = 10 m/s,
Duct surface convection coefficient α = 50 W/K-m²,
Pipe thermal load q = 300 W/m².
Task
Determine the air temperature rise along the pipe.
Solution
The pipe is divided into n sections. The heat flux q from each section is calculated. The consumed energy dQ can be found as:
dQ = q·t, where
q - thermal flux (W),
t - duration of air passage through the section, t = (L / n) / v.
Then the air temperature rise is calculated as:
dT = dQ / (dV·C·ρ), where
dQ - consumed energy (J),
dV - volume (m³),
C - thermal capacity of air (J / kg·K),
ρ - density of air (kg/m³).
Results
Initial state: air temperature 0°C, thermal flux from the wall to the air q = 18.85 W (per one section), consumed energy dQ = 0.754 J, temperature rize per one section dT = 2.4 °C.
After 3 iterations air temperature rise along the channel is dT = 21.81 °C
* Reference: John H. Lienhard IV, John H. Lienhard V, A heat transfer textbook.