温升效应对介质阻挡放电诱导速度和涡量的影响

Effect of Temperature Rise on Velocity and Vorticity Induced by Dielectric Barrier Discharge

表面介质阻挡放电等离子体同时存在力、热两种效应传递能量,为研究热效应对等离子体激励诱导流场的影响,通过求解带有体积力源项和热量源项的Navier-Stokes方程,建立了综合考虑动量效应和温升效应的介质阻挡放电物理模型,并对比分析了有、无温升效应时的速度场和涡量场。计算结果表明:同一时刻考虑温升效应时的诱导速度大于未考虑时的诱导速度,并且随激励时间的增长更为显著;在50 ms时考虑温升效应的诱导速度高出未考虑时诱导速度的9.5%;非定常激励下,温升效应对等离子体激励诱导涡量的大小产生显著影响,与无温升效应相比,等离子体激励作用期间的正涡涡量增大10%,负涡涡量增大5%,等离子体激励未作用期间温升效应加速了涡的耗散。

Surface dielectric barrier discharge plasma transfers energy by the form of force and heat. In order to researchthe effect of heat on the flow induced by plasma actuation, taking the temperature rise effect and the momentum effect in-to consideration, we established a model of AC dielectric barrier discharge by solving Navier-Stokes equations coupledwith force and heat sources. The velocity and vorticity fields were analyzed to study the effect of temperature rise. Thenumerical results show that temperature rise will increase the induced velocity, and this increment becomes larger with theincrease of actuation time. The induced velocity with temperature rise effect is 9.5% larger than that without temperaturerise effect at 50 ms. The temperature rise effect has a tremendous effect on vorticity： compared with the vorticity withouttemperature effect, the positive vorticity with temperature effect is 10% larger and the negative vorticity is 5% larger; be-sides, the temperature effect accelerates the dissipation of vorticity.