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Experimental and numerical study of ground vortex interaction in an air-intake
KTH, School of Engineering Sciences (SCI), Mechanics.
2005 (English)In: 43rd AIAA Aerospace Sciences Meeting and Exhibit - Meeting Papers, 2005, 4645-4654 p.Conference paper (Refereed)
Abstract [en]

The airflow field around air-intake related geometries has been investigated experimentally and numerically. The configuration of the experimental set-up is used to model a jet engine running near the ground. The experiments have been carried out using both PIV and LDA techniques in order to obtain the mean and fluctuating velocity field as well as the low speed frequencies related to the system of ground vortices. The LDA data provided frequency data that cannot be obtained from conventional PIV measurements. Additionally, flow visualization, using smoke and different seeding particles have been performed to obtain qualitative information about the flow structures and the ground vortices. Large Eddy Simulation (LES) has been used to study, quantitatively and qualitatively, the flow field and the dynamics of the vortex structures. A comparison of the results in terms of the mean velocity field shows very good agreement between the experimental and the LES results. The computed solution of the flow field is used also to estimate the ingestion of particles into the air-intake. This study proves that small particles can be ingested into the jet engine. The limiting particle size depends on the flow conditions and the distance of the air-intake from the ground as well as its inclination relative to the ground.

Place, publisher, year, edition, pages
2005. 4645-4654 p.
Keyword [en]
Air-intake, Ground vortex interaction, Large eddy simulation (LES), Vortex structure, Computer simulation, Flow visualization, Frequencies, Jet engines, Particle size analysis, Smoke, Aerospace engineering
National Category
Vehicle Engineering
URN: urn:nbn:se:kth:diva-156562ScopusID: 2-s2.0-30744464124OAI: diva2:767327
43rd AIAA Aerospace Sciences Meeting and Exhibit, 10 January 2005 through 13 January 2005, Reno, NV, United States

QC 20141201

Available from: 2014-12-01 Created: 2014-12-01 Last updated: 2014-12-01Bibliographically approved

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