Characterization of a synthetic jet vortex ring flowing through honeycomb

The investigation of synthetic jet vortex rings flowing through a honeycomb is measured by two-dimensional particle-image velocimetry. established using free jets generated piston–cylinder apparatus upstream the honeycomb. On that basis, turbulence obtained at circulation Reynolds numbers ReΓ = 3437, 5155, 6874, and 8592, Resj 561, 841, 1121, 1402. effects diameter number (ReM 41–449) length-to-cell ratio (Φ 4.2–12.5) on characterization flow are discussed in detail. A combinatorial similarity parameter can characterize effect passive control fields proposed validated. parameter, ReM/Φ, determined dimensional analysis according to change momentum flux loss; its predictive capability verified quantitatively based loss kinetic energy vortex-ring circulation. evolutions phase-averaged vorticity finite-time Lyapunov exponents nearly consistent close parameters. Furthermore, as indicated results, ReM/Φ responds combined relative magnitude inertial viscous forces, shape resistance geometry flow-field–honeycomb interactions. Understanding ring important for accuracy prediction models selection size.