Aeroacoustic Investigation of a High-Lift Device by Means of Synchronized PIV and Microphone Measurements

Kurzfassung

In the present paper the causality correlation technique is applied for the experimental detection of noise sources at the leading edge slat in a high-lift device configuration. Velocity measurements in the vicinity of the slat using PIV as well as pressure measurements at the surface of the leading edge of the main-wing are conducted. Synchronously microphone measurements in the far-field of the wing's suction and pressure side are performed. By calculating the cross-correlation between the obtained near- and far-field quantities, regularities in the near-field related to the radiated sound-field are identified. Results for different angles of attack are compared and analyzed.