Plasma-Assisted Combustor Dynamics Control at Realistic Gas Turbine Conditions
Plasma-Assisted Combustor Dynamics Control at Realistic Gas Turbine Conditions
复制标题
真实燃气轮机条件下的等离子体辅助燃烧室动力学控制
DOI：
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发表时间：
2019
影响因子：
1.9
通讯作者：
J. Cohen
中科院分区：
文献类型：
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作者：
Wookyung Kim;J. Cohen
摘要本文研究了等离子体放电改善燃烧室动力学和火焰稳定性的有效性。具体地说，纳秒脉冲等离子体放电（NSPD）被施加到预混气体燃料/空气转储燃烧室的动态燃烧不稳定性的缓解与最小的NOX惩罚。结果表明，在航空发动机燃烧室实际低功率工况下，压力波动水平显著降低（2倍至4倍）。还原所需的等离子体功率随着燃烧室入口速度和压力的增加而增加。将燃料从甲烷改变为丙烷需要显著（2倍）更高的等离子体功率来实现类似的噪声降低。贫油熄火极限显着延长，由于等离子体，但是，大量的不完全燃烧发生在延长制度。在等离子体的存在下，NOx的增量产生较低（~ <1 EINOX）;然而，随着速度和压力的降低以及温度的升高，NOx的增量产生增加。
ABSTRACT This study investigated the effectiveness of implementing a plasma discharge to improve combustor dynamics and flame stability. Specifically, a nano-second pulsed plasma discharge (NSPD) was applied to a premixed gaseous fuel/air dump combustor for mitigation of dynamic combustion instabilities with a minimal NOX penalty. As a result, a significant reduction of pressure fluctuation level (2X to 4X) was observed at realistic low-power conditions of aero-engine combustors. The plasma power required for the reduction increased with increasing combustor inlet velocity and pressure. The change of fuel from methane to propane required significantly (2X) higher plasma power to achieve a similar noise reduction. The lean blowout limit was significantly extended due to the plasma; however, substantial incomplete combustion occurred in the extended regime. The incremental NOX production in the presence of the plasma was low (~ < 1EINOX); however, it increased with decreasing velocity and pressure, and increasing temperature.