CAJ | 학술논문

采用模拟计算的方法对多孔引燃柴油喷射器瞬态柴油初始喷雾过程进行了研究 ,并利用纹影试验结果对计算模型进行了验证.研究结果表明 ,KHRT模型对多孔引燃柴油喷射器柴油初始喷雾的贯穿距和喷雾形状的预测与试验结果均较为吻合 ;柴油初始喷雾贯穿距随背压升高而减小 ,随环境温度的升高而增大 ;索特平均直径随背压的升高而降低 ,随环境温度的升高而增加 ;喷雾锥角随背压的升高而增大 ,随环境温度的升高而减小 ;因此背压较小 ,环境温度较低时柴油的引燃可靠性较高.
채용모의계산적방법대다공인연시유분사기순태시유초시분무과정진행료연구 ,병이용문영시험결과대계산모형진행료험증.연구결과표명 ,KHRT모형대다공인연시유분사기시유초시분무적관천거화분무형상적예측여시험결과균교위문합 ;시유초시분무관천거수배압승고이감소 ,수배경온도적승고이증대 ;색특평균직경수배압적승고이강저 ,수배경온도적승고이증가 ;분무추각수배압적승고이증대 ,수배경온도적승고이감소 ;인차배압교소 ,배경온도교저시시유적인연가고성교고.
The spray transient characteristics of multi-hole pilot diesel injector were studied by numerical simulation and the computational model was verified with schlieren visualization method .The results indicated that the predicted spray penetration and spray shape of KHRT model were in good agreement with the experimental results .The penetration of initial diesel spray and Sauter mean diameter decreased with the increase of back pressure and increased with the rise of ambient temperature and the trend of spray cone angle were opposite .Accordingly ,the ignition reliability of diesel was high under the low back pressure and ambient temperature .