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a relative slow and steady increase. The highest temperature of all excitation voltages always appears at position x = 0, where there is the onset of plasma formation. a)Vp−p =9.1kV. b)Vp−p =11.4kV. c)Vp−p =12.0kV. d)Vp−p =13.0kV. e)Vp−p =14.0kV. f)Vp−p =15.0kV. Figure 5. Temperature variation at different locations with operation times at different AC-DBD excitation voltages (F = 13.4 kHz). Table 1 shows the temperatures at seven reading points along the chord at different operation times for Vp−p = 15 kV. It can be seen that the maximum temperatures are 96.4 ◦C located at x = 0 after 25 s plasma actuation. With first 0 - 5 s actuation time, the temperature increases from 29.6 to 77.2 ◦C, the increment is 47.6 ◦. For the last 20 s actuation time, the temperature increment is 19.2 ◦. In researches of Stanfield et al.,16 the distributions and the magnitudes of the rotational temperature measured by using emission spectroscopy for the AC-DBD actuator are matched well with the present infrared imaging results, but the plasma vibrational temperatures is almost 40 times of the surface temperature of the actuator, so for AC-DBD plasma actuator, the surface temperature of the actuator is determined by rotational temperature. Table 1. Temperature distribution along chord of actuator at different operation times (Vp−p = 15 kV, F = 13.4 kHz) t 0s 5s 10 s 15 s 20 s 25 s x = -5 mm 32.5 33.2 33.7 34.0 34.1 34.4 -2.5 mm 32.6 33.6 34.3 34.7 35.1 35.3 0 2.5 mm 29.6 29.5 77.2 66.4 85.4 76.3 91.3 82.3 93.7 84.1 96.4 87.7 5.0 mm 29.3 55.8 66.3 72.7 76.6 79.7 7.5 mm 29.2 41.1 50.0 55.1 58.5 61.3 10.0 mm 29.0 37.6 44.5 48.3 51.3 53.8 Fig. 6 shows surface temperature along the chord at different excitation voltage and same frequency. It shows that the temperature of the exposed electrode almost does not change and the highest temperature 6 of 14 American Institute of Aeronautics and Astronautics Downloaded by NORTHWESTERN POLYTECHICAL UNIV. on June 23, 2016 | http://arc.aiaa.org | DOI: 10.2514/6.2016-4019PDF Image | Experimental Study of Deicing and Anti-icing on a Cylinder by DBD Plasma Actuation
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