Closed-loop control of a turbulent compressible Mach 0.6 Jet

Kerwin R. Low, Marlyn Y. Andino, Ryan M. Wallace, Andre M. Hall, Mark N. Glauser

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A turbulent compressible Mach 0.6 jet was used as a test bed for applying closed loop flow control schemes, with the control objective of reduction of the far-field noise signature. The Reynolds number, based on a nozzle exit diameter of 0.0508m, is 690,000. An azimuthal array of eight zero-net mass flux piezo-electric jets, placed at the jet exit, was used for control authority. The actuators were driven at 1900Hz, corresponding to an exit velocity ≈ 50m/s from each actuator. Three control cases were tested, an open loop mode-0 excitation, a closed loop mode-0 (column mode) excitation, and a closed loop mode-1 (helical mode) excitation. A spatial Fourier azimuthal decomposition of the near-field hydrodynamic pressure at 8D in the stream wise is used for state estimation and feedback. The far-field sound was measured with six microphones oriented along a boom at increasing polar angles from φ= 15°-90° at 75D downstream to evaluate the effectiveness of each controlled case. For φ = 15° (shallow angle), an overall increase in the sound at lower Strouhal numbers (0.04 - 0.2) of the jet was noticed for all controlled cases. The greatest reduction was noticed for the closed loop mode-0 case. Conversely, an overall decrease in the sound was noticed at higher jet Strouhal numbers (0.2 - 3.7). At φ = 60° and 90°, there was an overall increase in farfield sound for all controlled cases.

Original languageEnglish (US)
Title of host publication47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
StatePublished - 2009
Event47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition - Orlando, FL, United States
Duration: Jan 5 2009Jan 8 2009

Publication series

Name47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition

Other

Other47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition
CountryUnited States
CityOrlando, FL
Period1/5/091/8/09

ASJC Scopus subject areas

  • Space and Planetary Science
  • Aerospace Engineering

Fingerprint Dive into the research topics of 'Closed-loop control of a turbulent compressible Mach 0.6 Jet'. Together they form a unique fingerprint.

  • Cite this

    Low, K. R., Andino, M. Y., Wallace, R. M., Hall, A. M., & Glauser, M. N. (2009). Closed-loop control of a turbulent compressible Mach 0.6 Jet. In 47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition [2009-0854] (47th AIAA Aerospace Sciences Meeting including the New Horizons Forum and Aerospace Exposition).