Compared ionic wind measurements on multi-tip corona and DBD plasma actuators

• Several corona and DBD actuators with triangular tips are studied in the laboratory.
• Far field ionic wind velocity, mass flow and efficiency are measured.
• The multi-tip electrodes improve the performances of all the actuators.
• Optimal electrode shapes are found as function of tip sharpness and tips number.

Two sets of actuators with triangular tips on their active electrodes (13 corona and 15 DBD) are studied in the laboratory. Far field ionic wind velocity, mass flow and efficiency are measured for all the actuators. The best electrode shape as function of tip sharpness and tips number/unit length is determined for each of the above measurements. The gas velocity increases downstream of the tips in all the actuators, but the DBD flow has a three-dimensional structure more complicated than for coronas. The tips improve the efficiency of all the actuators, and the stability of coronas is remarkably improved.

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