Project Overview
Complete design & analysis of a closed-circuit subsonic wind tunnel, including an axial fan. Methodology from literature review and analytical sizing, validated via full-channel CFD simulations across design & off-design conditions.
Abstract
Target was a 2.6 m×1.84 m test section at 100 m/s. Achieved <1% flow uniformity mid-plane (<3% overall), <0.17% turbulence intensity. Axial fan (isolated-airfoil + free-vortex) achieved 89% analytical and 80.85% CFD efficiency at ΔP = 853 Pa.
Wind Tunnel Geometry
CFD Velocity Profile
CFD Pressure Profile
Mid-Plane Test-Section Contour
Turbulence vs. Height
Turbulence vs. Width
- Dimensions: 2.6 m × 1.84 m test section
- Speed: 100 m/s (CFD: 103.25 m/s)
- Uniformity: <1% mid-plane, <3% overall
- Turbulence: <0.17%
Fan Mesh & Blade Design
Velocity Vector Contour
Fan Pressure Contour
Blade Loading
Inlet→Outlet Pressure Rise
- Type: Single-stage axial fan
- Analytical η: 89%
- Simulated η: 80.85%
- ΔP: 853 Pa
- Method: Airfoil theory & free vortex