论文部分内容阅读
为了增强燃烧的稳定性,提出了利用介质阻挡放电等离子体装置来实现值班火焰的思路。通过布置在燃烧器出口扩张段上的等离子体激励器产生等离子体,并在燃烧过程中一直保持等离子体激励器处于工作状态,这样产生的等离子体可以起到类似值班火焰的作用——稳定燃烧、防止熄火。该装置具有结构简单紧凑、功耗低、激励参数可以在线调节且不影响燃烧器结构设计等优点。基于实验研究考察了该装置对旋流扩散燃烧中不稳定抬升火焰的作用效果。火焰结构的观测通过平面激光诱导荧光测试系统来实现。实验中观测到随等离子体激励功率增大,火焰高度逐步降低向喷嘴出口位置靠近,且反应更趋紧凑,这初步验证了该装置可以稳定燃烧、防止熄火,表明通过介质阻挡放电等离子体装置来实现值班火焰的设计思路可行。
In order to enhance the stability of combustion, the idea of using dielectric barrier discharge plasma device to realize on-duty flame is proposed. The plasma is generated by a plasma actuator arranged on the expansion section of the burner outlet and kept in the operating state during the combustion process so that the generated plasma can function as a fire on duty, , To prevent flameout. The device has the advantages of simple and compact structure, low power consumption, adjustable excitation parameters on-line and no influence on the structural design of the burner. Based on the experimental study, the effect of the device on the unsteady uplifted flame in swirling diffusion combustion was investigated. Flame structure observations were made using a planar laser-induced fluorescence test system. It was observed experimentally that with the increase of plasma excitation power and the gradual decrease of flame height towards the exit of the nozzle, the reaction was more compact, which proves that the device can stabilize combustion and prevent flameout, indicating that by means of the dielectric barrier discharge plasma device To achieve the design of fire on duty feasible.