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Atomization and Sprays

Published 12 issues per year

ISSN Print: 1044-5110

ISSN Online: 1936-2684

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Indexed in

INFLUENCE OF PIEZO-DRIVEN SYNTHETIC JET ON WATER SPRAY BEHAVIOR

Volume 27, Issue 8, 2017, pp. 691-706
DOI: 10.1615/AtomizSpr.2017020419
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ABSTRACT

The opportunity of directly managing the spray formation and its characteristics has gained much interest in the last few years, due to the various active flow control methods available nowadays. In this work particle image velocimetry (PIV) has been applied to investigate the effect of a piezo-driven synthetic jet (SJ) on the droplet velocity distribution of a water spray. Tests were carried out under atmospheric conditions within a chamber test rig, equipped with optical accesses, at two injection pressures, namely, 5 and 10 MPa, exploring the variation of the spray flow field caused by the synthetic jet perturbations. The SJ orifice axis has been placed 45 deg tilted with respect to the water spray axis, and the nozzle body has been moved along its own axis for three different positions. PIV measurements have been averaged on 300 trials. For each operation condition, the actual influence region of the SJ has been evaluated through a T-test algorithm. The synthetic jet locally interacts with the spray, remarkably energizing the region downstream of the impact. The effectiveness of the actuator decreases for higher injection pressures and shorter distances between spray nozzle and SJ orifice. The study has been corroborated by a vorticity field analysis, which is able to identify the influence of coherent vortex structures generated by the air jet, in terms of both droplet momentum and droplet spreading variations.

CITED BY
  1. Capuano Francesco, Palumbo Andrea, de Luca Luigi, Comparative study of spectral-element and finite-volume solvers for direct numerical simulation of synthetic jets, Computers & Fluids, 179, 2019. Crossref

  2. Palumbo Andrea, Chiatto Matteo, de Luca Luigi, Measurements versus Numerical Simulations for Slotted Synthetic Jet Actuator, Actuators, 7, 3, 2018. Crossref

  3. Chiatto Matteo, Capuano Francesco, de Luca Luigi, Numerical and experimental characterization of a double-orifice synthetic jet actuator, Meccanica, 53, 11-12, 2018. Crossref

  4. He Wei, Luo Zhen-bing, Deng Xiong, Xia Zhi-xun, Experimental investigation on the performance of a novel dual synthetic jet actuator-based atomization device, International Journal of Heat and Mass Transfer, 142, 2019. Crossref

  5. Chiatto Matteo, Palumbo Andrea, de Luca Luigi, Design approach to predict synthetic jet formation and resonance amplifications, Experimental Thermal and Fluid Science, 107, 2019. Crossref

  6. Matsuura Hiroshi, Furukawa Hiromitsu, Tanikawa Tamio, Hashimoto Hideki, Formation of jet atomization using a steel plate vibrated by weakly coupled ultrasonic transducer through water, Japanese Journal of Applied Physics, 58, 10, 2019. Crossref

  7. He Wei, Luo Zhenbing, Deng Xiong, Xia Zhixun, A novel spray cooling device based on a dual synthetic jet actuator integrated with a piezoelectric atomizer, Heat and Mass Transfer, 56, 5, 2020. Crossref

  8. Palumbo Andrea, Della Pia Alessandro, Chiatto Matteo, de Luca Luigi, Numerical Study on the Flow Field Generated by a Double-Orifice Synthetic Jet Device, in Proceedings of XXIV AIMETA Conference 2019, 2020. Crossref

  9. Farrell Gearóid, Gibbons Michael, Persoons Tim, Combined Passive/Active Flow Control of Drag and Lift Forces on a Cylinder in Crossflow Using a Synthetic Jet Actuator and Porous Coatings, Actuators, 11, 7, 2022. Crossref

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