Wind Tunnel-an Experimental Tool in Aerodynamics; Types of Wind Tunnels — Lesson 1

This lesson covers the concept and types of wind tunnels, which are devices used to produce movement of air around a model of an object for aerodynamic studies. The lesson explains how wind tunnels are used to control the flow conditions, which can influence the forces that act on an aircraft model or any other object of interest. It also discusses how the forces and moments acting on the models in the test section of a wind tunnel can be controlled by adjusting the flow velocity. The lesson further explains how the forces measured on a scaled-down model can be scaled up to what would be expected on a full-size aircraft using appropriate scaling laws. It also touches on the different types of wind tunnels, including open circuit, closed circuit, and special purpose tunnels.

Video Highlights

01:18 - Discussion on controlling the flow conditions inside the wind tunnel.
05:34 - Explanation of open circuit and closed circuit wind tunnels.
11:07 - Discussion on the advantages and disadvantages of open circuit and closed circuit wind tunnels.
16:00 - Explanation of the function and use of special purpose wind tunnels in various studies.

Key Takeaways

- Wind tunnels are experimental tools used in aerodynamic studies to control the flow conditions around a model of an object.
- The forces and moments acting on the models in a wind tunnel can be controlled by adjusting the flow velocity.
- The forces measured on a scaled-down model in a wind tunnel can be scaled up to what would be expected on a full-size aircraft using appropriate scaling laws.
- There are different types of wind tunnels, including open circuit, closed circuit, and special purpose tunnels, each with its own advantages and disadvantages.