Low-dimensional description of the flow field over a hemisphere

Marlyn Y. Andino, Mark N Glauser

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


A study of the flow physics around a cylindrical turret with the application of open-loop control has been performed. The evaluation of flow control performance is accomplished by analyzing the changes in the turbulent flow time/length scales across the turret surface for three cases. Even though these quantities are not direct measures of the aero-optics, literature suggest there is a strong relationship between them. Previous results open-loop results demonstrate reductions in both RMS and Reynolds shear stress over the separated region. Autocorrelations of the unsteady pressure sensors for the actuated low speed tests exhibit a more organized almost periodic behavior. We are interested in developing a low dimensional description of the flow field over a 3D turret through the use of velocity measurements. The use of snapshot POD for two cases: baseline and lumped measurements. Reconstruction of the velocity field using 75% of the energy was accomplished using only 13 and 20% for baseline and lumped POD, respectively.

Original languageEnglish (US)
Title of host publication40th AIAA Fluid Dynamics Conference
StatePublished - 2010
Event40th AIAA Fluid Dynamics Conference - Chicago, IL, United States
Duration: Jun 28 2010Jul 1 2010


Other40th AIAA Fluid Dynamics Conference
CountryUnited States
CityChicago, IL


ASJC Scopus subject areas

  • Fluid Flow and Transfer Processes

Cite this

Andino, M. Y., & Glauser, M. N. (2010). Low-dimensional description of the flow field over a hemisphere. In 40th AIAA Fluid Dynamics Conference [2010-4592]