A Numerical Investigation of the Effects of Piston Bowl Geometry and Spray Angle on Combustion, Performance and Emission of a Diesel Engine

IF 3.6 3区工程技术 Q3 ENERGY & FUELS

Energy Science & Engineering Pub Date : 2026-10-14 Epub Date: 2026-08-10 DOI:10.1002/ese3.70614

Md. Nazmul Haque, Abdullah Al Rifat, Tafsirul Hassan, Md. Ifthaker Alam, Mohammad Mehedi Hasan Kazol, Md. Ashraful Islam, Abidur Rahman Adib, Mizanur Rahman

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引用次数: 0

Abstract

A piston bowl's design and spray angle improve air–fuel mixing, resulting in more complete combustion and higher efficiency. Ansys Forte 2023 R1 a CFD software was used to analyze the effects of five combustion chamber geometries of cylinder, modified re-entrant, re-entrant, double-stepped, and stepped on engine performance, combustion, and emission characteristics at spray angles of 1000°, 1050°, 1100°, 1150°, and 1200°, respectively. This study looks into the effects of piston bowl shape and spray angle on engine performance and emission characteristics. The numerical investigation is carried out with a load of 0.44 MPa and a start of injection at 7° bTDC. The double stepped piston bowl with spray angles of 110°–115° has the maximum thermal efficiency and the lowest ISFC, while reducing VOC, UHC, soot, and CO emissions. The combustion and performance parameters for piston bowl geometries are optimized at spray angles of 110° and 115°. At these spray angles, improved fuel–air interaction leads to higher peak cylinder pressure, peak cylinder temperature, thermal efficiency, and ISFC consumption while producing reduced emissions. The results show that spray angle optimization is crucial, with 110°–115° emerging as the optimal spray angle range for piston bowl selection and combustion optimization. Among the bowl geometries, the double stepped demonstrate the most balanced performance-emission trade-off at spray angles of 110° and 115° compared to stepped, modified re-entrant, re-entrant, and cylindrical shapes.

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活塞碗几何形状和喷射角对柴油机燃烧、性能和排放影响的数值研究

活塞碗的设计和喷射角度改善了空气-燃料混合，从而使燃烧更完全，效率更高。采用Ansys Forte 2023 R1 CFD软件，分析了喷角分别为1000°、1050°、1100°、1150°和1200°时，气缸、改进型、改进型、双阶梯和阶梯形5种燃烧室几何形状对发动机性能、燃烧和排放特性的影响。研究了活塞碗形状和喷射角对发动机性能和排放特性的影响。数值研究是在载荷为0.44 MPa，在7°顶止点开始喷射的情况下进行的。喷射角度为110°-115°的双阶梯活塞碗具有最高的热效率和最低的ISFC，同时减少VOC， UHC，烟尘和CO的排放。在喷射角为110°和115°时，对活塞碗几何形状的燃烧和性能参数进行了优化。在这些喷射角度下，燃料-空气相互作用的改善会带来更高的峰值气缸压力、峰值气缸温度、热效率和ISFC消耗，同时减少排放。结果表明，喷射角优化至关重要，110°~ 115°是活塞缸选择和燃烧优化的最佳喷射角范围。在碗状结构中，与阶梯式、改良的重入式、重入式和圆柱形结构相比，双阶梯结构在喷射角度为110°和115°时表现出最平衡的性能-排放权衡。

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来源期刊

Energy Science & Engineering Engineering-Safety, Risk, Reliability and Quality

CiteScore

6.80

自引率

7.90%

发文量

298

审稿时长

11 weeks

期刊介绍： Energy Science & Engineering is a peer reviewed, open access journal dedicated to fundamental and applied research on energy and supply and use. Published as a co-operative venture of Wiley and SCI (Society of Chemical Industry), the journal offers authors a fast route to publication and the ability to share their research with the widest possible audience of scientists, professionals and other interested people across the globe. Securing an affordable and low carbon energy supply is a critical challenge of the 21st century and the solutions will require collaboration between scientists and engineers worldwide. This new journal aims to facilitate collaboration and spark innovation in energy research and development. Due to the importance of this topic to society and economic development the journal will give priority to quality research papers that are accessible to a broad readership and discuss sustainable, state-of-the art approaches to shaping the future of energy. This multidisciplinary journal will appeal to all researchers and professionals working in any area of energy in academia, industry or government, including scientists, engineers, consultants, policy-makers, government officials, economists and corporate organisations.