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Actuators 2018, 7(3), 58; https://doi.org/10.3390/act7030058

Experimental Measurement Benchmark for Compressible Fluidic Unsteady Jet

University Lille, CNRS, ONERA, Arts et Metiers Paris Tech, Centrale Lille, FRE2017–LMFL, Laboratoire de Mécanique des Fluides de Lille–Kampé de Fériet, F-59000 Lille, France
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Received: 23 July 2018 / Revised: 20 August 2018 / Accepted: 6 September 2018 / Published: 10 September 2018
(This article belongs to the Special Issue Synthetic Jet Actuators)
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Abstract

A benchmark of different measurement techniques is presented to characterize the dynamic response of a synthetic jet actuator working in compressible regime. The setup involves a piston-based synthetic jet, as well as the benchmarked measurements are hot-wire, cold-wire, Laser Doppler Anemometry, pressure transducer, and Schlieren visualization. Measured flow temperatures range from 20 °C to 150 °C, pressure ranges from 0.5 atm to 4 atm, and velocity are up to 300 m/s. The extreme values of these ranges are reached in an oscillating fashion at a frequency ranging from 30 to 100 Hz. The measurements are pointing out the limitation of cold-wire measurements, due to its high thermic inertia. The results show consistency in the velocity measurements, within 10% in the worst case, between all measurement techniques and the errors are traced back to the calibration ranges, whose sensitivity is also studied. View Full-Text
Keywords: compressible jet; measurements; calibration; synthetic-jet; hot-wire; cold-wire; LDA; Schlieren; shadowgraphy compressible jet; measurements; calibration; synthetic-jet; hot-wire; cold-wire; LDA; Schlieren; shadowgraphy
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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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MDPI and ACS Style

Fernandez, P.; Delva, J.; Ott, C.; Maier, P.; Gallas, Q. Experimental Measurement Benchmark for Compressible Fluidic Unsteady Jet. Actuators 2018, 7, 58.

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