半球形和环形活塞碗形状对柴油机燃烧特性影响的对比研究

IF 14.4 Q1 ENERGY & FUELS

Biofuel Research Journal-BRJ Pub Date : 2018-09-01 DOI:10.18331/BRJ2018.5.3.5

M. Channappagoudra, K. Ramesh, G. Manavendra

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引用次数: 15

摘要

柴油发动机的参数通常比生物柴油及其混合物更适合纯柴油。因此，优化操作条件和活塞碗的几何形状，以实现更好的性能与生物柴油在传统的柴油发动机是非常必要的。在本研究中，将现有柴油机的半球形活塞碗形状(HPBG)改进为环形活塞碗形状(TPBG)，以评估柴油机在20%乳渣油生物柴油(B20)混合物上运行的性能。试验结果表明，发动机改造后，制动热效率和放热率分别提高了5.5%和17.24%，制动比油耗、HC排放和CO排放分别降低了8.75%、15%和14.47%。使用TPBG可以改善燃油雾化，减小燃油液滴尺寸，提高气缸温度，增强压缩涡流和燃烧过程中的湍流动能。目前的研究结果可以为制造柴油发动机铺平道路，柴油发动机可以更有效地与生物柴油及其混合物兼容。

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Comparative investigation of the effect of hemispherical and toroidal piston bowl geometries on diesel engine combustion characteristics

Diesel engine parameters are in general more compatible with operating on neat diesel than biodiesel and its blends. Therefore, optimizing operating conditions as well as piston bowl geometry to achieve a better performance with biodiesel in conventional diesel engines is highly essential. In the present study, hemispherical piston bowl geometry (HPBG) of existing diesel engine was modified into toroidal piston bowl geometry (TPBG) to evaluate the performance of a diesel engine running on a 20% blend of dairy scum oil biodiesel (B20). The experimental results revealed increased brake thermal efficiency and heat release rate by 5.5% and 17.24%, respectively, while brake specific fuel consumption, HC emission, and CO emission were decreased by 8.75%, 15%, and 14.47%, respectively, in response to the engine modification applied. Such improvements using the TPBG could be attributed to improved fuel atomization, reduction of fuel droplet size, increased cylinder temperature, enhanced squish-swirl, and turbulence kinetic energy during combustion. The findings of the present study could pave the way for the fabrication of diesel engines, which are more efficiently compatible with biodiesel and its blends.

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来源期刊

Biofuel Research Journal-BRJ ENERGY & FUELS-

CiteScore

22.10

自引率

1.50%

发文量

审稿时长

8 weeks

期刊介绍： Biofuel Research Journal (BRJ) is a leading, peer-reviewed academic journal that focuses on high-quality research in the field of biofuels, bioproducts, and biomass-derived materials and technologies. The journal's primary goal is to contribute to the advancement of knowledge and understanding in the areas of sustainable energy solutions, environmental protection, and the circular economy. BRJ accepts various types of articles, including original research papers, review papers, case studies, short communications, and hypotheses. The specific areas covered by the journal include Biofuels and Bioproducts, Biomass Valorization, Biomass-Derived Materials for Energy and Storage Systems, Techno-Economic and Environmental Assessments, Climate Change and Sustainability, and Biofuels and Bioproducts in Circular Economy, among others. BRJ actively encourages interdisciplinary collaborations among researchers, engineers, scientists, policymakers, and industry experts to facilitate the adoption of sustainable energy solutions and promote a greener future. The journal maintains rigorous standards of peer review and editorial integrity to ensure that only impactful and high-quality research is published. Currently, BRJ is indexed by several prominent databases such as Web of Science, CAS Databases, Directory of Open Access Journals, Scimago Journal Rank, Scopus, Google Scholar, Elektronische Zeitschriftenbibliothek EZB, et al.