This paper reports on the quantification of the heating induced by nanosecond repetitively pulsed (NRP) glow discharges on a lean premixed methane-air flame. The flame, obtained at room temperature and atmospheric pressure, has an M-shape morphology. The equivalence ratio is 0.95 and the thermal power released by the flame is 113 W. The NRP glow discharges are produced by high voltage pulses of 10 ns duration, 7 kV amplitude, applied at a repetition frequency of 10 kHz. The average power of the plasma, determined from current and voltage measurements, is 1 W, i.e. about 0.9 % of the thermal power of the flame. Broadband vibrational coherent anti-Stokes Raman spectroscopy of nitrogen is used to determine the temperature of the flame with and without plasma enhancement. The temperature evolution in the flame area shows that the thermal impact of NRP glow discharges is in the uncertainty range of the technique, i.e., +/- 40 K.
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机译:本文报告了纳秒重复脉冲(NRP)荧光放电诱导的加热量的定量报道贫甲烷 - 空气火焰上的加热。在室温和大气压下获得的火焰具有M形状的形态。等效比为0.95,火焰释放的热功率为113W。NRP发光放电通过10ns持续时间的高电压脉冲,7kV振幅,以10kHz的重复频率施加。从电流和电压测量确定的等离子体的平均功率为1W,即火焰热功率的约0.9%。玻璃振动相干抗斯托克斯拉曼氮气光谱法用于确定具有和不具有血浆增强的火焰的温度。火焰区域的温度演变表明,NRP发光放电的热撞击在该技术的不确定性范围内,即,+/- 40 K.
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