CAJ | 학술논문

通过数值计算方法研究火核半径、点火能量以及点火持续时间的耦合作用对燃烧室点火特性的影响。研究表明：导致点火失败的原因有3个，即点火功率不足、点火持续时间不足以及火核半径太小。当点火功率较小时，可以通过延长点火持续时间的方法使点火成功，但是当点火功率低于最低值时，无论如何延长点火时间，点火都是失败的；当点火持续时间较小时，可以通过提高点火功率做补偿，以保证点火成功，但是当点火持续时间低于最低值时，无论如何提高点火功率，点火都是失败的；当火核半径较小时，要想保证点火成功，必须延长点火时间，但是当火核半径低于最低值时，无论如何延长点火时间或提高点火功率，点火都是失败的。
통과수치계산방법연구화핵반경、점화능량이급점화지속시간적우합작용대연소실점화특성적영향。연구표명：도치점화실패적원인유3개，즉점화공솔불족、점화지속시간불족이급화핵반경태소。당점화공솔교소시，가이통과연장점화지속시간적방법사점화성공，단시당점화공솔저우최저치시，무론여하연장점화시간，점화도시실패적；당점화지속시간교소시，가이통과제고점화공솔주보상，이보증점화성공，단시당점화지속시간저우최저치시，무론여하제고점화공솔，점화도시실패적；당화핵반경교소시，요상보증점화성공，필수연장점화시간，단시당화핵반경저우최저치시，무론여하연장점화시간혹제고점화공솔，점화도시실패적。
Numerical simulation on performance of gas turbine combustor ignition ( including ignition energy, spark kernel radius and ignition persistence time) was studied in the present work. The result show that, there are three reasons which can result in ignition failed ( insufficient ignition power, insufficient ignition persistence time, and insufficient electric spark radius) . While ignition power is insufficient, the flame can be ignited successfully by extending the persistence time, unless the ignition power is under the minimum value. While the ignition persistence time is insufficient, the flame can be ignited successfully by increasing the ignition power, unless the persistence time is under the minimum value. While the electric spark radius is insufficient, the flame can be ignited successfully by extending the persistence time, unless the persistence time is under the minimum value.