Comparison of various fluidic oscillators for separation control on a wall-mounted hump

Christopher Otto, Philipp Tewes, Jesse C. Little, Rene Woszidlo

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

5 Scopus citations


Various fluidic oscillators were tested on a model of the NASA hump geometry in support of the development of active flow control technology. Time-averaged pressure measurements were conducted with high spatial resolution along both the chord and span of the model. Well-established flow control coefficients (based on momentum and energy) are used as criteria to compare the performance and efficiency of different fluidic oscillator designs. Additionally, Stereoscopic Particle Image Velocimetry and surface flow visualization were employed to provide insight on the flow physics. Results indicate large deviations in efficiency for different actuator geometries. This is in part due to different opening angles of the jets and the associated spanwise coverage. The strength and coherence of counter-rotating vortex pairs along the span significantly influences the performance but is not a universal indicator of control authority.

Original languageEnglish (US)
Title of host publicationAIAA Scitech 2019 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
ISBN (Print)9781624105784
StatePublished - 2019
EventAIAA Scitech Forum, 2019 - San Diego, United States
Duration: Jan 7 2019Jan 11 2019

Publication series

NameAIAA Scitech 2019 Forum


ConferenceAIAA Scitech Forum, 2019
Country/TerritoryUnited States
CitySan Diego

ASJC Scopus subject areas

  • Aerospace Engineering


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