Chen Yanhui, Zhang Jian, Zhang Zhiqing, Zhong Weihuang, Zhao Ziheng, Hu Jingyi
Mechanical and Engineering Department, Guangxi Vocational College of Water Resources and Electric Power, Nanning, 530023, China.
Guangxi Earthmoving Machinery Collaborative Innovation Center, Guangxi University of Science and Technology, Liuzhou, 545006, China.
Heliyon. 2023 Sep 4;9(9):e19196. doi: 10.1016/j.heliyon.2023.e19196. eCollection 2023 Sep.
This work investigated and compared the impact on performance and emission characteristics of diesel engine fueled with five different proportions of biodiesel blends. Firstly, the three-dimensional simulation software CONVERGE was used to create a 3D simulation model of in-cylinder combustion for a diesel engine. Secondly, the experimental data of cylinder pressure and NO emissions at 50% and 100% loads were employed to verify the simulation model. Finally, the combustion processes of blends with proportions of 0%, 5%, 10%, 15%, and 20% biodiesel were simulated and compared by using the model. The study showed that the brake thermal efficiencies (BTEs) of biodiesel blends with 5%, 10%, 15%, and 20% of biodiesel were increased by 1.24%, 1.89%, 3.13%, and 3.82% at 50% load, respectively, compared with pure diesel. In addition, the soot emissions were decreased by 1.20%, 2.64%, 3.88%, and 4.65%, respectively. However, as the proportion of biodiesel in the biodiesel blends increased, the brake specific fuel consumption (BSFC) and NO emissions increased. At 50% load, the BSFCs of biodiesel blends with 5%, 10%, 15%, and 20% of biodiesel increased by 0.61%, 1.34%, 1.42%, and 2.17%, respectively, compared with pure diesel. Additionally, the brake powers (BPs) were decreased by 0.64%, 1.31%, 1.88%, and 2.62% at 100% load, respectively.
本研究调查并比较了以五种不同比例生物柴油混合物为燃料的柴油发动机对性能和排放特性的影响。首先，使用三维模拟软件CONVERGE创建了柴油发动机缸内燃烧的三维模拟模型。其次，利用50%和100%负荷下的气缸压力和NO排放实验数据对模拟模型进行验证。最后，使用该模型对生物柴油比例为0%、5%、10%、15%和20%的混合物的燃烧过程进行模拟和比较。研究表明，与纯柴油相比，生物柴油比例为5%、10%、15%和20%的生物柴油混合物在50%负荷下的制动热效率（BTE）分别提高了1.24%、1.89%、3.13%和3.82%。此外，碳烟排放分别降低了1.20%、2.64%、3.88%和4.65%。然而，随着生物柴油混合物中生物柴油比例的增加，制动比油耗（BSFC）和NO排放增加。在50%负荷下，与纯柴油相比，生物柴油比例为5%、10%、15%和20%的生物柴油混合物的BSFC分别增加了0.61%、1.34%、1.42%和2.17%。此外，在100%负荷下，制动功率（BP）分别降低了0.64%、1.31%、1.88%和2.62%。
