Vortex Shedding - Smarter Every Day 23

TL;DR

Vortex shedding occurs when there is a discontinuity in air pressure around an object, such as an airplane wing or paddle, resulting in the formation of vortexes.

Transcript

[Engines screaming] Hey it's me, Destin. We're at an airshow. So today I'm going to teach you about vortex shedding. [Engines screaming] (Man) YEAH! (Destin) Fly... flying our airplanes. [Engine roaring] (Destin) I can't hear you. Why does the smoke come out of the airplane? (Sadie) To help it go better. - Makes perfect sense. [Engine roaring] [Pro... Read More

Key Insights

• 👱 Vortex shedding occurs when there is a difference in air pressure around an object, resulting in the formation of vortexes.
• 🏋️ The Bernoulli principle explains why airplanes generate lift and how vortex shedding can disrupt this balance.
• 😘 Airplane wings and paddles are designed to control and minimize the impact of vortex shedding for improved efficiency.
• 🐲 Vortex shedding can affect stability, drag, and performance in various objects and systems.
• 🎨 Understanding vortex shedding is crucial for optimizing the design and performance of aircraft, paddles, and other fluid systems.
• 🐲 Controlling vortex shedding helps reduce drag and increase efficiency in both airplanes and paddles.
• 👱 Discontinuities in air pressure create vortices that can be visually observed and calculated in various situations.

Questions & Answers

Q: How does vortex shedding occur in airplanes and paddles?

Vortex shedding occurs when there is a difference in air pressure around an object, creating vortexes at the edges where high and low pressure meet. For airplanes, this can affect stability, while for paddles, it can increase drag.

Q: How does the Bernoulli principle relate to vortex shedding?

The Bernoulli principle explains the relationship between flow speed, pressure, and lift on an airplane wing. Faster airflow over the top of the wing creates lower pressure, resulting in lift. Vortex shedding can disrupt this balance.

Q: How do airplane wings control and reduce vortex shedding?

Airplane wings are designed with specific shapes and swept angles to manage vortex shedding. By controlling the vortices and reducing their impact on the aircraft, drag is minimized, improving efficiency and stability.

Q: Can vortex shedding occur with other objects besides airplane wings?

Yes, vortex shedding can happen with other objects, such as paddles. When there is a difference in pressure along the surface of the paddle, vortex shedding occurs at the edges, affecting efficiency and performance.

Summary & Key Takeaways

• Vortex shedding is when high pressure and low pressure areas around an object cause vortexes to form, leading to drag and instability.

• Airplanes use the Bernoulli principle to generate lift, with low pressure on top and high pressure on the bottom of the wings.

• The shape and design of airplane wings, as well as paddles, are optimized to control and reduce vortex shedding.