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A direct current plasma microjet is generated from a microhollow cathode discharge device in air with helium and oxygen (2%) as working gas. With the increase of the gas flow rate, a laminar-to-turbulent transition was found at a flow rate between 2.5 and 3.0 slm. The corresponding critical Reynolds number is calculated to be between 639 and 768. A stable bifurcation of the jet tip is observed with a transition flow when a nozzle with a 400-µm diameter opening is used.

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