An experimental study of the formation and unsteady characteristics of inlet vortices

Research output: Chapter in Book/Report/Conference proceedingChapter

Abstract

An experimental study of the unsteady characteristics of inlet vortices has been conducted using a high frame rate digital particle image velocimetry (DPIV) system. The results revealed the formation of a pair of counter rotating inlet vortices for no crosswind configuration and one single inlet vortex when there was crosswind. Near ground surface flow measurements confirmed that inlet vortex was originated from the separation point on the ground. In all measurement planes, including near the ground plane, evidence of vortex meandering with quasi-periodicity was found. The vortex meander amplitude increases with crosswind velocity. The proper orthogonal decomposition (POD) analysis of the captured instantaneous flow structures suggested that the most energetic mode was a helical displacement wave, corresponding to the first helical mode.
Original languageEnglish
Title of host publication49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition
Place of PublicationReston, U. S. A.
PublisherAmerican Institute of Aeronautics and Astronautics
Publication statusPublished - 2011
Event49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, January 4, 2011 - January 7, 2011 - Orlando, FL, USA United States
Duration: 1 Jan 2011 → …

Conference

Conference49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, January 4, 2011 - January 7, 2011
CountryUSA United States
CityOrlando, FL
Period1/01/11 → …

Fingerprint

Vortex flow
Intake systems
Surface measurement
Flow measurement
Flow structure
Velocity measurement
Decomposition

Cite this

Wang, Z., & Gursul, I. (2011). An experimental study of the formation and unsteady characteristics of inlet vortices. In 49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition Reston, U. S. A.: American Institute of Aeronautics and Astronautics.

An experimental study of the formation and unsteady characteristics of inlet vortices. / Wang, Zhijin; Gursul, Ismet.

49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Reston, U. S. A. : American Institute of Aeronautics and Astronautics, 2011.

Research output: Chapter in Book/Report/Conference proceedingChapter

Wang, Z & Gursul, I 2011, An experimental study of the formation and unsteady characteristics of inlet vortices. in 49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. American Institute of Aeronautics and Astronautics, Reston, U. S. A., 49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition, January 4, 2011 - January 7, 2011, Orlando, FL, USA United States, 1/01/11.
Wang Z, Gursul I. An experimental study of the formation and unsteady characteristics of inlet vortices. In 49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Reston, U. S. A.: American Institute of Aeronautics and Astronautics. 2011
Wang, Zhijin ; Gursul, Ismet. / An experimental study of the formation and unsteady characteristics of inlet vortices. 49th AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition. Reston, U. S. A. : American Institute of Aeronautics and Astronautics, 2011.
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abstract = "An experimental study of the unsteady characteristics of inlet vortices has been conducted using a high frame rate digital particle image velocimetry (DPIV) system. The results revealed the formation of a pair of counter rotating inlet vortices for no crosswind configuration and one single inlet vortex when there was crosswind. Near ground surface flow measurements confirmed that inlet vortex was originated from the separation point on the ground. In all measurement planes, including near the ground plane, evidence of vortex meandering with quasi-periodicity was found. The vortex meander amplitude increases with crosswind velocity. The proper orthogonal decomposition (POD) analysis of the captured instantaneous flow structures suggested that the most energetic mode was a helical displacement wave, corresponding to the first helical mode.",
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