| Autor: |
Tsao, R., Nomikos, N., Furey, J. |
| Předmět: |
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| Zdroj: |
EA National Conference Publications; 2023, p482-487, 6p |
| Abstrakt: |
The use of Infrared Thermography (IRT) in the study of flow transition is a non-intrusive visualisation method, which allows the identification of the state of flow within the boundary layer (laminar, transitional or turbulent). The visualisation is made possible due to the enhanced fluid mixing in the turbulent region resulting a higher heat transfer rate than in the laminar region over surface. The boundary layer state over an aerofoil is an important factor it drives the aerodynamic loads and determines the flow wake and separation. As the scaled experiment do not replicate full size scenarios, the flow will be altered to mimic real world flow characteristics. The introduction of tripping device is to trigger transition in the boundary layer into an earlier and desired location. Experiments are set to run at chord-based Reynolds number ranging from 5 × 105 to 1.3 × 106 in a closed wind tunnel and utilising boundary layer tripping device. The IRT technique is used for fast visualisation and verification of the boundary layer thickness measurement. The primary findings of this study are: 1) successful data acquisition in the wind tunnel; 2) evaluation of sizing criteria of Hama strip tripping device; 3) IRT technique is comparable to measure of the physical thickness of the boundary layer and transition location. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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