Closed Circuit Subsonic Wind Tunnels Closed Circuit Manufacturer,Supplier and Exporter in India
Product Code : EL-SML-12119
Quick Answer: The Closed Circuit Subsonic Wind Tunnel is a compact tunnel for fundamental experiments in aerodynamics, with a transparent test section for full flow visualisation. It is listed in two versions, with test sections of 300 x 300 mm and 300 x 200 mm, both with a velocity range of 2 to 40 m/s.
Last updated: October 2026
Key Features
- Stilling chamber with a honeycomb and grids of varying mesh sizes
- Contraction designed for a uniform velocity distribution in the test section
- Transparent test section for full flow visualisation and for laser anemometry systems
- Axial fan on a variable speed electric motor with a frequency controller, set by remote control or an analogue signal
- Models, aerofoils, balances and probes such as pitot tubes and hot wires can be fitted to the test section
- Air-water heat exchanger to keep the air temperature constant during prolonged operation
Technical Specifications
| Specification | Value |
|---|---|
| Test section | 300 x 300 mm, 700 mm long (larger version); 300 x 200 mm, 600 mm long (smaller version) |
| Velocity range | 2 to 40 m/s, both versions |
| Contraction ratio | 8 (300 x 300 mm version); 4 (300 x 200 mm version) |
| Overall dimensions | 4420 x 1420 x 2100 mm (300 x 300 mm version); 3000 x 700 x 1500 mm (300 x 200 mm version) |
| Power requirement | 7,5 kW (300 x 300 mm version); 3 kW (300 x 200 mm version) |
| Weight (approx.) | 450 kg (300 x 300 mm version); 250 kg (300 x 200 mm version) |
| Power supply | 380/440 V, 3 phase, 50 Hz |
About This Product
Closed circuit subsonic wind tunnels circulate air around a loop that includes a test section, diffuser, fan and corner sections with guide vanes, so a model such as an aerofoil can be studied in a controlled stream. They are used for fundamental experiments in aerodynamics, such as force measurement with a balance and velocity measurement with pitot tubes or hot wires. An air-water heat exchanger keeps the air temperature constant during long runs. The Closed Circuit Subsonic Wind Tunnels can be supplied and exported to buyers in Cyprus, Mauritius, Latvia, Malawi and Brunei.
Frequently Asked Questions
Q1. What velocity range does the Closed Circuit Subsonic Wind Tunnel have?
The velocity range is 2 to 40 m/s. The fan is coupled to a variable speed electric motor with a frequency controller.
Q2. Which test section sizes are listed?
The wind tunnel is listed with test sections of 300 x 300 mm, 700 mm long, and 300 x 200 mm, 600 mm long.
Q3. Can it run as an open jet?
Yes. The closed circuit test section is removed and replaced by a profiled entry section mounted on the diffuser downstream flanges.
Related: Structural Mechanics Lab, Flow Visualization Wind Tunnel, Water Hammer Demonstration Unit, Falling Sphere Viscosimeter.
For a quotation on the Closed Circuit Subsonic Wind Tunnels, contact School Lab Equipment India.