In computational models of atmospheric pressure surface barrier discharges (SBDs) the role of heating of the dielectric material and the quiescent gas is often neglected, impacting the accuracy of the calculated chemical kinetics. In this contribution, a two-dimensional fluid model of an SBD was developed and experimentally validated to determine the relative contribution of the dominant heat transfer mechanisms and to quantify the impact of discharge heating on the resultant chemistry. Three heating mechanisms were examined, including electron heating of the background gas due to inelastic collisions, ion bombardment of the dielectric surface and dielectric heating by the time-varying electric field. It was shown that electron heating of the background gas was not significant enough to account for the experimentally observed increase in temperature of the dielectric material, despite being the dominant heating mechanism of the gas close to the electrode. Dielectric heating was ruled out as the frequency response of typical dielectric materials used in SBD devices does not overlap with the experimentally observed power spectrum of an SBD excited at kHz frequencies. The ionic flux heating was found to be the dominant heating mechanism of the dielectric material and the downstream flow driven by the SBD. The largest impact of plasma heating on discharge chemistry was found in reactive nitrogen species (RNS) production, where the densities of RNSs increased when an appropriate treatment of heating was adopted. This had a marked effect on the discharge chemistry, with the concentration of NO₂ increasing by almost 50% compared to the idealized constant temperature case.

在大气压表面势垒放电（SBD）的计算模型中，通常会忽略介电材料和静态气体的加热作用，从而影响所计算化学动力学的准确性。在这一贡献中，开发了SBD的二维流体模型，并通过实验验证了其确定主要传热机制的相对贡献，并量化了排放加热对所得化学物质的影响。研究了三种加热机理，包括由于非弹性碰撞而引起的背景气体的电子加热，电介质表面的离子轰击以及时变电场对电介质的加热。结果表明，尽管背景气体是靠近电极的气体的主要加热机理，但背景气体的电子加热不足以说明实验观察到的电介质材料温度的升高。排除了电介质加热，因为SBD器件中使用的典型电介质材料的频率响应与以kHz频率激发的SBD的实验观察到的功率谱不重叠。发现离子通量加热是介电材料和由SBD驱动的下游流动的主要加热机制。等离子体加热对放电化学的最大影响是在反应性氮物质（RNS）的生产中，当采用适当的加热处理方法时，RNS的密度会增加。与理想的恒温情况相比，₂几乎增加了50％。