CAJ | 학술논문

利用 KIVA-3V 程序平台，建立起适用于不同掺氢比 HCNG 发动机燃烧模拟的数值模型。通过试验缸压值和燃烧放热率与模拟结果的对比，验证了该模型可靠性。利用该模型研究了0、30%和55%这3种不同掺氢比HCNG 发动机燃烧过程中的缸内温度分布状态。研究结果表明，掺氢可以降低点火延迟期，提高燃烧速度和燃烧稳定性；掺氢比越高，缸内最高燃烧温度越高，不利于氮氧化物排放；可以通过增加过量空气系数、降低燃烧温度来减少氮氧化物排放。
이용 KIVA-3V 정서평태，건립기괄용우불동참경비 HCNG 발동궤연소모의적수치모형。통과시험항압치화연소방열솔여모의결과적대비，험증료해모형가고성。이용해모형연구료0、30%화55%저3충불동참경비HCNG 발동궤연소과정중적항내온도분포상태。연구결과표명，참경가이강저점화연지기，제고연소속도화연소은정성；참경비월고，항내최고연소온도월고，불리우담양화물배방；가이통과증가과량공기계수、강저연소온도래감소담양화물배방。
A numerical model is established in KIVA-3V program platform, which is suitable to simulate combustion progress for an HCNG with different hydrogen ratios. Through comparison between experimental cylinder pressure value and combustion heat release ratio with simulation results, this model is proved to be reliable. Additionally, this model is used to study the temperature distribution in the HCNG engine cylinder during combustion for three different hydrogen ratios (0, 30% and 55 % ). Results show that blending hydrogen can decrease ignition delay period, increase combustion rate and stability. The higher the hydrogen ratio is, the higher the maximum temperature in cylinder will be, which is harmful for nitric oxide emissions. By increasing excess air ratio, combustion temperature and nitric oxide emissions can be decreased.