等离子体助燃含硼富燃燃气燃烧实验研究

Experimental Study on Plasma Assisted Combustion of Fuel-Rich Gas Containing Boron Particles

关键词:  等离子体  富燃燃气  燃烧效率  等离子助燃

Key words:  Plasma  Fuel-rich gas  Combustion efficiency  Plasma-assisted combustion

摘要:

等离子体能够有效地改善燃料的燃烧速率，缩短点火时间，改变火焰稳定性，被认为是最高效的辅助点火方法。为了验证等离子体对含硼富燃燃气燃烧的增强特性，利用一套带透明窗的燃烧实验装置开展了多次实验研究。实验结果表明，在补燃室环境中加入等离子体可使富燃燃气点火位置靠前，燃烧火焰面变大，高温反应区前移，从而改善了硼粒子的燃烧环境；通过计算对比有/无等离子工况下的补燃室二次燃烧效率，表明加入等离子后可使得补燃室二次燃烧效率提高5%以上，且随着放电功率的增加，等离子体助燃效果也显著增加，补燃室中增加的燃烧热与等离子体放电功率比值大约在7左右。

Abstract:

Plasma can effectively improve the burning rate of the fuel，shorten the ignition time，change the flame stability，and the plasma-assisted combustion is considered as the most effective method of assisted ignition. Experiments were established for testing the performance of the plasma-assisted combustion of fuel-rich gas containing boron particles by using a test facility which has transparent observation windows. The results indicate that adding plasma into the fuel-rich gas makes the ignition position closer to the front of combustor，the burning surface becomes larger and high temperature reaction zone moves forward，which improves the combustion environment of boron particles. By calculating the combustion efficiency under the condition of the plasma and the no-plasma in the afterburner，it indicates that the combustion efficiency can increase by 5% after the addition of plasma and with the increase of discharge power，the effect of plasma-assisted combustion significantly increases，the increased combustion heat in the afterburner is about 7 times of the discharge power .