介质阻挡放电等离子体激励调控稳焰器液雾场  

Flameholder spray control by dielectric barrier discharge plasma actuation

作　　者：蔡树峰 陈钱 CAI Shufeng;CHEN Qian(School of Aeronautics and Astronautics,Sun Yat-sen University,Shenzhen 518107,China)

机构地区：[1]中山大学航空航天学院,广东深圳518107

出　　处：《中山大学学报(自然科学版)(中英文)》2025年第2期103-111,共9页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金(91741102);广东省基础与应用基础研究基金(2024A1515010712)。

摘　　要：对亚声速燃烧室蒸发式稳焰器的非定常煤油液雾流场进行了介质阻挡放电等离子体激励调控研究。利用欧拉-拉格朗日方法,实现湍流空气与离散液滴的双向耦合,并采用体积力模拟介质阻挡放电等离子体对流场的作用。研究结果表明:不同激励位置、激励电压和激励频率的介质阻挡放电等离子体激励能够通过改变流体的局部动量,对稳焰器后的再循环区流场、煤油液雾场以及煤油和空气的混合产生调控作用。通过流场和液雾场的分析,能确定特定来流条件对应的最优激励参数。在本研究的来流条件下,稳焰器壁面前段外侧位置处施加15 kV和15 kHz的等离子体激励能够增加稳焰器后的再循环区长度和低速区域面积,改善煤油雾化和蒸发效果,促使燃料-氧化剂充分混合,延长可燃混合物的停留时间,有利于实现可靠点火和维持稳定燃烧。A study on the unsteady kerosene spray field of subsonic combustor evaporative flameholder was carried out.The Euler-Lagrange method is used to realize the two-way coupling of turbulent air and discrete droplet,and the effect of dielectric barrier discharge plasma on the flow field is simulated by volume force.The research results indicate that dielectric barrier discharge plasma actuation with different actuation position,actuation voltage and actuation frequency can control the flow field in the recirculation zone after the flameholder,the kerosene spray field and the mixing of kerosene and air through changing the local momentum of the fluid.The optimal actuation parameters corresponding to the specific flow conditions can often be determined.Specifically,under the conditions of incoming flow studied in this paper,applying plasma actuation with a voltage of 15 kV and a frequency of 15 kHz at the front section outside the flameholder wall can increase the length of the recirculation zone and the area of the low-speed region behind the flameholder,improve the kerosene atomization and evaporation,promote the mixing of fuel and oxidizer,prolong the residence time of the combustible mixture,and thereby facilitate reliable ignition and sustain stable combustion.

关 键 词：蒸发式稳焰器 煤油液雾场 调控 介质阻挡放电 等离子体激励 

分 类 号：V434[航空宇航科学与技术—航空宇航推进理论与工程]