Enhancement of Combustion and Flame Stabilization Using Stabilized Non-Equilibrium Plasma
نویسندگان
چکیده
The effect of a stabilized non-equilibrium gliding arc plasma discharge on the stabilization and extinction of nitrogen diluted, methane/air counterflow diffusion flames was investigated both experimentally and numerically. To quantify the effect, extinction limits and flame temperature profiles via Rayleigh scattering were measured, calculated and compared to numerical simulations using detailed chemistry. The results show that the extinction limits were significantly extended, with up to a 220 percent increase in the extinction strain rate with low levels of plasma power addition. Comparison between experimental and numerical simulations showed good agreement for low power plasma activation of the air stream, indicating that the combustion enhancement of the diffusion flame was dominated by thermal effects.
منابع مشابه
Effects of non-equilibrium plasma discharge on counterflow diffusion flame extinction
A non-equilibrium plasma assisted combustion system was developed by integrating a counterflow burner with a nano-second pulser to study the effects of atomic oxygen production on the extinction limits of methane diffusion flames at low pressure conditions. The production of atomic oxygen from the repetitive nano-second plasma discharge was measured by using two-photon absorption laser-induced ...
متن کاملSimulation of Aerodynamics and Combustion in Open Swirl Flow
Flame stabilization by swirl is a common feature of many combustors. While most of the swirl combustors are enclosed, there have been relatively few studies of open swirl-stabilized flames. In the current study, an open swirl-stabilized turbulent premixed flame is studied numerically. The purpose of this work is to obtain a better understanding of the flame properties by simulating the flow fie...
متن کاملFlame Stabilization Enhancement and NOx Production using Ultra Short Repetitively Pulsed Plasma Discharges
This paper examines the use of plasma discharges in flame stabilization. Three different types of plasma discharges are applied to a lifted jet diffusion flame in a coflow configuration, and evaluated for their abilities to enhance flame stabilization. A single electrode corona discharge (SECD) between a platinum electrode and the flame base is found to maintain the flame at a 20% higher coflow...
متن کاملFlame Structure and Chemiluminescence Emissions of Inverse Diffusion Flames under Sinusoidally Driven Plasma Discharges
Reduction of nitric oxides (NOx) in aircraft engines and in gas turbines by lean combustion is of great interest in the design of novel combustion systems. However, the stabilization of the flame under lean conditions is a main issue. In this context, the present work investigates the effects of sinusoidal dielectric barrier discharge (DBD) on a lean inverse diffusive methane/air flame in a Bun...
متن کاملDirect ignition and S-curve transition by in situ nano-second pulsed discharge in methane/ oxygen/helium counterflow flame
A well-defined plasma assisted combustion system with novel in situ discharge in a counterflow diffusion flame was developed to study the direct coupling kinetic effect of non-equilibrium plasma on flame ignition and extinction. A uniform discharge was generated between the burner nozzles by placing porous metal electrodes at the nozzle exits. The ignition and extinction characteristics of CH4/...
متن کامل