Investigation on effects on enhancing lift by acoustic excitation
Abstract
A low-speed wind-tunnel test shows that beneficial effects on enhancing lift can be obtained by using internal acoustic excitation to control the shedding vortices. The relations between the excited frequency, the main-vortex naturally shedding frequency, and the main-vortex shedding frequency are given. Regularities of the surface pressure with the sound-pressure level and frequency are also given. This paper provides important experimental results for the applied study of internal acoustic excitation of a 2D airfoil or a delta wing.
- Publication:
-
Acta Aerodynamica Sinica
- Pub Date:
- March 1992
- Bibcode:
- 1992AcAer..10..140H
- Keywords:
-
- Acoustic Excitation;
- Airfoils;
- Lift;
- Vortex Shedding;
- Wind Tunnel Tests;
- Backward Facing Steps;
- Delta Wings;
- Low Speed Wind Tunnels;
- Pressure Distribution;
- Sound Pressure;
- Acoustics