Uploaded January 2024 | Updated September 2026, 2 weeks ago
Extending the aircraft flight envelope by mitigating transonic airfoil buffet
by Esther Lagemann, Steven L. Brunton, Wolfgang Schröder, Christian Lagemann
arXiv: arxiv.org/abs/2401.08894
In the age of globalization, commercial aviation plays a central role in maintaining our international connectivity by providing fast air transport services for passengers and freight. However, the upper limit of the aircraft flight envelope, essentially the maximum aircraft speed, is usually fixed by the occurrence of a safety-critical aerodynamic phenomenon called transonic airfoil buffet. It refers to shock wave oscillations occurring on the aircraft wings, which induce unsteady aerodynamic loads acting on the wing structure. Since these loads can cause severe structural damage endangering flight safety, the aviation industry is highly interested in suppressing transonic airfoil buffet to extend the flight envelope to higher aircraft speeds. In this contribution, we demonstrate with experimental wind tunnel measurements that the application of porous trailing edges substantially attenuates the buffet phenomenon. Since porous trailing edges have the additional benefit of reducing acoustic aircraft emissions, our findings could pave the way for faster air transport with reduced noise emissions.
Extending the aircraft flight envelope by mitigating transonic airfoil buffet
by Esther Lagemann, Steven L. Brunton, Wolfgang Schröder, Christian Lagemann
arXiv: arxiv.org/abs/2401.08894
In the age of globalization, commercial aviation plays a central role in maintaining our international connectivity by providing fast air transport services for passengers and freight. However, the upper limit of the aircraft flight envelope, essentially the maximum aircraft speed, is usually fixed by the occurrence of a safety-critical aerodynamic phenomenon called transonic airfoil buffet. It refers to shock wave oscillations occurring on the aircraft wings, which induce unsteady aerodynamic loads acting on the wing structure. Since these loads can cause severe structural damage endangering flight safety, the aviation industry is highly interested in suppressing transonic airfoil buffet to extend the flight envelope to higher aircraft speeds. In this contribution, we demonstrate with experimental wind tunnel measurements that the application of porous trailing edges substantially attenuates the buffet phenomenon. Since porous trailing edges have the additional benefit of reducing acoustic aircraft emissions, our findings could pave the way for faster air transport with reduced noise emissions.
![Python Symbolic Regression (PySR) [Physics Informed Machine Learning]](https://i.ytimg.com/vi/df43V4OjMVs/mqdefault.jpg "Python Symbolic Regression (PySR) [Physics Informed Machine Learning]
This video was produced at the University of Washington, and we acknowledge funding support from the Boeing Company
%%% CHAPTERS %%%
00:00 Intro
02:14 What is Symbolic Regression?
04:08 High-Level Algorithm/ Genetic Programming Overview
// 05:26 Crossover and Mutation
08:12 History of Symbolic Discovery/ Background: Symbolic Discovery
// 09:16 Symbolic Discovery Case Study
// 11:15 Case Study: Control Laws
12:18 Why PySR
// 12:18 PySR: Features
// 13:15 PySR: Benchmarks
// 14:00 PySR: Code Structure
14:19 Why Symbolic Regression/ Potential Outro
15:48 Outro")
