Two-Dimensional Unsteady Flow — Lesson 5

This lesson covers the concept of two-dimensional unsteady flow in incompressible conditions. It explains the governing equation and boundary conditions for this type of flow. The lesson also discusses Theodorsene's theory from 1934 and how it was used to solve the problem of unsteady flow. The instructor explains the concept of inversion integral and how it is used in the approach to solve the problem. The lesson also covers the impact of airfoil motion on unsteady flow and the concept of shed vortices. The lesson concludes with the explanation of the relationship between wake and circulation on the airfoil.

Video Highlights

01:10 - Discussion on the difference between steady and unsteady flow at.
09:22 - Explanation of the impact of the wake on the flow on the aerofoil at.
31:52 - Explanation of the condition applied on the aerofoil at.
59:57 - Discussion on the concept of reduced frequency and its implications at.
73:19 - Explanation of the final expressions for lift and moment on the aerofoil at.

Key Takeaways

- Two-dimensional unsteady flow in incompressible conditions is governed by a specific equation and boundary conditions.
- Theodorsene's theory from 1934 was instrumental in solving the problem of unsteady flow.
- The inversion integral is a crucial concept in the approach to solving the problem of unsteady flow.
- The motion of the airfoil has a significant impact on unsteady flow.
- Shed vortices play a crucial role in the process of unsteady flow.
- There is a specific relationship between the wake and the circulation on the airfoil.