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Measurement of a Temperature Field Generated by a Synthetic Jet Actuator using Digital Holographic Interferometry

1
Dept. of Energy Devices, Technical University of Liberec, Studentska 2, 46117 Liberec, Czech Republic
2
Institute of New Technologies and Applied Informatics, Technical University of Liberec, Studentska 2, 46117 Liberec, Czech Republic
*
Author to whom correspondence should be addressed.
Actuators 2019, 8(1), 27; https://doi.org/10.3390/act8010027
Received: 9 January 2019 / Revised: 10 March 2019 / Accepted: 11 March 2019 / Published: 18 March 2019
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Abstract

This paper shows the possibility of the measurement of a temperature field generated by heated fluid from a synthetic jet (SJ) actuator. Digital holographic interferometry (DHI) was the main measuring method used for the experiments. A single-projection DHI was used for the visualization of the temperature field as an average temperature along the optical axis. The DHI results are compared with data obtained from constant current anemometry (CCA) experiments for the validation of the method. Principle of 3D temperature distribution using a tomographic approach is also described in this paper. A single SJ actuator, multiple continual nozzle, and the SJ actuator with two output orifices are used as a testing device for the presented experiments. The experimental configuration can measure high-frequency synthetic jets with the use of a single slow-frame-rate camera. Due to the periodic character of the SJ flow, synchronization between the digital camera, and the external trigger driving the phenomenon is performed. This approach can also distinguish between periodic and random parts of the flow. View Full-Text
Keywords: synthetic jet; temperature field; digital holographic interferometry; tomography; Twyman-Green interferometer; double sensitivity synthetic jet; temperature field; digital holographic interferometry; tomography; Twyman-Green interferometer; double sensitivity
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Dancova, P.; Psota, P.; Vit, T. Measurement of a Temperature Field Generated by a Synthetic Jet Actuator using Digital Holographic Interferometry. Actuators 2019, 8, 27.

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