Using a Passive Feedback Connection to Control Low-Frequency Pressure Fluctuations in a Wind Tunnel

Authors

  • Peter Waudby-Smith Aiolos Engineering Corporation
  • Antrix Joshi Aiolos Engineering Corporation https://orcid.org/0000-0001-7304-1266
  • Christopher Sooriyakumaran Aiolos Engineering Corporation
  • Christoph Gabriel
  • Martin Grabenstein

Keywords:

Wind tunnel pressure fluctuations, Passive Feedback Connection, Model Wind Tunnel

Abstract

A Passive Feedback Connection (PFC) was evaluated for use in an aero-acoustic wind tunnel. The PFC can reduce the high-amplitude low-frequency pressure fluctuations in the wind tunnel circuit. In addition, the PFC can also reduce non-periodic fluctuations in wind speeds, i.e., not just fluctuations associated with resonances arising from the coupling of open jet pressure instabilities with circuit modes. The PFC achieved these results without significantly altering the axial static pressure gradient in the wind tunnel.

Published

2022-07-25

How to Cite

1.
Waudby-Smith P, Joshi A, Sooriyakumaran C, Gabriel C, Grabenstein M. Using a Passive Feedback Connection to Control Low-Frequency Pressure Fluctuations in a Wind Tunnel. Canadian Acoustics [Internet]. 2022 Jul. 25 [cited 2022 Aug. 14];50(1). Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/3455

Issue

Section

Article - Engineering Acoustics / Noise Control