CAJ | 학술논문

从柴油机缸内传热着手,对柴油机燃用柴油和碳酸二甲酯(DMC)混合燃料后,柴油机缸内传热规律和热效率以及动力性进行了研究.研究结果表明:燃用柴油和DMC混合燃料后,柴油机缸内燃烧改善,热效率提高约0.56%;碳烟减少约50%.从而导致缸内辐射传热量及传热损失减少,在DMC添加比为15%时,缸内辐射传热量下降20%,约占缸内总传热量的2.4%.传热损失减少主要是通过冷却水带走的热量减少,其减少量约占缸内总传热量的2.5%,和辐射传热量下降大致相当.
종시유궤항내전열착수,대시유궤연용시유화탄산이갑지(DMC)혼합연료후,시유궤항내전열규률화열효솔이급동력성진행료연구.연구결과표명:연용시유화DMC혼합연료후,시유궤항내연소개선,열효솔제고약0.56%;탄연감소약50%.종이도치항내복사전열량급전열손실감소,재DMC첨가비위15%시,항내복사전열량하강20%,약점항내총전열량적2.4%.전열손실감소주요시통과냉각수대주적열량감소,기감소량약점항내총전열량적2.5%,화복사전열량하강대치상당.
A study on the heat transfer in cylinder, thermal efficiency and power output of a diesel engine fueled with DMC-diesel blend was carried out. The results show that compared to fueled with pure diesel, combustion can be improved, the thermal efficiency is increased by 0.56%, the smoke emission is decreased by 50%, the radiation heat flux and heat transfer loss are reduced. When DMC proportion is 15%,the in-cylinder radiation heat flux is decreased by 20%, accounting for 2.4% of the in-cylinder total heat flux. The heat transfer loss reduction is mainly attributed to less heat transmitted to the coolant, its amount accounts for about 2.5% of the in-cylinder total heat flux, almost equals to that of the radiation heat flux.