Wind tunnels are constructed in different configurations, primarily as either open-circuit or closed-circuit designs. Here's a breakdown of their construction based on the provided reference:
Wind Tunnel Types
Wind tunnels come in two main designs:
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Open-Circuit (Open-Return) Tunnels: These are essentially long, straight boxes. Air enters one end, passes through the test section, and exits the other end into the atmosphere.
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Closed-Circuit (Closed-Return) Tunnels: These tunnels are built in a loop, often oval-shaped, allowing air to circulate continuously. Vanes and honeycomb panels are used to guide and direct the airflow precisely around the "racetrack." The same air circulates around the circuit.
The specific materials and construction techniques vary depending on the tunnel's size, desired airspeed, and intended use.
