Synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement
Also available in printed version
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| Format: | Master's thesis |
| Language: | English |
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Universiti Teknologi Malaysia
2025
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| Online Access: | https://utmik.utm.my/handle/123456789/49778 |
| Abstract | Abstract here |
| _version_ | 1854975061701689344 |
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| author | Airi Ali |
| author2 | Suhaimi Mansor, supervisor |
| author_facet | Suhaimi Mansor, supervisor Airi Ali |
| author_sort | Airi Ali |
| description | Also available in printed version |
| format | Master's thesis |
| id | utm-123456789-49778 |
| institution | Universiti Teknologi Malaysia |
| language | English |
| publishDate | 2025 |
| publisher | Universiti Teknologi Malaysia |
| record_format | dspace |
| record_pdf | Abstract |
| spelling | utm-123456789-497782025-08-20T22:25:40Z Synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement Airi Ali Suhaimi Mansor, supervisor Mechanical engineering Also available in printed version Synthetic jet actuator is an active flow control device which is used in many applications such as to delay separation on the wing, to enhance mixing process or in vectoring thrust. The performance of this device depends on the magnitude of self-induced air jet velocity coming out from the orifice which travels downstream in the form of a vortex pair. The formation of the vortex pair in the case of quiescent flow is influenced by a number of parameters involving the geometry (i.e. cavity and orifice) and the oscillating diaphragm. Slight variation in actuator geometry during manufacturing process will produce greater variation in actuator performance. Investigation of orifice geometry effect on the jet performance and flow field has been performed through numerical simulation. A synthetic jet actuator studied in the previous work has been fabricated. The displacement of piezoelectric diaphragm was measured and used to model the diaphragm motion in the simulation. Hotwire anemometry measurement was performed to measure the jet velocity and used to validate simulation results. Validation of simulation result has been performed and good agreement result with experimental data has been obtained. The validated simulation technique was then applied to predict the performance of a new actuator design. The investigation of orifice geometry effect was then performed based on this design. The jet velocity and the flow pattern were the indicator used in the comparative study. Large reduction in jet velocity magnitude with value of 7 % per 0.1 mm curvature radius was observed for actuator with curvature on the upper orifice lips. Curvature on the lower orifice lips gave a slight decrement on the actuator performance while chamfer shape orifice increased jet travel distance. Reducing orifice width to half of baseline width increased jet velocity by two times the baseline jet velocity. In general, orifice geometry has significant effect on synthetic jet actuator performance as demonstrated in the simulation zulaihi UTM 105 p. Thesis (Sarjana Kejuruteraan (Mekanikal)) - Universiti Teknologi Malaysia, 2016 2025-03-13T05:24:00Z 2025-03-13T05:24:00Z 2016 Master's thesis https://utmik.utm.my/handle/123456789/49778 vital:114208 valet-20180829-112413 ENG Closed Access UTM Complete Unpublished Completion application/pdf Universiti Teknologi Malaysia |
| spellingShingle | Mechanical engineering Airi Ali Synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement |
| thesis_level | Master |
| title | Synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement |
| title_full | Synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement |
| title_fullStr | Synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement |
| title_full_unstemmed | Synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement |
| title_short | Synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement |
| title_sort | synthetic jet actuator performance due to orifice geometry and piezoelectric diaphragm movement |
| topic | Mechanical engineering |
| url | https://utmik.utm.my/handle/123456789/49778 |
| work_keys_str_mv | AT airiali syntheticjetactuatorperformanceduetoorificegeometryandpiezoelectricdiaphragmmovement |