Research and optimization on the exhaust flow characteristic based on energy splitting method of the low speed marine diesel engine

IF 2.6 3区 工程技术 Q3 ENERGY & FUELS Journal of Energy Resources Technology-transactions of The Asme Pub Date : 2023-10-05 DOI:10.1115/1.4063664
Fengshuo He, Xinlei Feng, Zhenjia Pan, Gongjie Zhou, Yong Lu
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Abstract

In this study, an optimization scheme for exhaust flow characteristics based on energy splitting method is proposed. The low-speed marine diesel engine adopts the exhaust energy splitting method during the exhaust process. Based on this, a one-dimensional GT Power calculation model, a three-dimensional CONVERGE calculation model, and a three-dimensional model of the gas collection box are established. After splitting, the vortex structure in the same phase of the gas collection box has a larger scale, higher flow rate, more significant entropy increase, and more severe turbulence dissipation. The high-grade gas collection box is optimized from the perspectives of length and diameter; The results show that after optimization, the flow energy dissipation brought by the vortex structure is reduced, and the outlet pressure and flow velocity of the gas collection box are increased.
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基于能量分裂法的低速船用柴油机排气流动特性研究与优化
摘要本文提出了一种基于能量分裂法的排气流动特性优化方案。低速船用柴油机在排气过程中采用了排气能量分裂的方法。在此基础上,建立了一维GT Power计算模型、三维CONVERGE计算模型和集气箱三维模型。劈裂后,集气箱同相涡结构规模更大,流速更高,熵增加更显著,湍流耗散更严重。高档集气箱从长度和直径两方面进行了优化;结果表明:优化后,涡流结构带来的流动能量耗散减小,集气箱出口压力和流速提高;
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来源期刊
CiteScore
6.40
自引率
30.00%
发文量
213
审稿时长
4.5 months
期刊介绍: Specific areas of importance including, but not limited to: Fundamentals of thermodynamics such as energy, entropy and exergy, laws of thermodynamics; Thermoeconomics; Alternative and renewable energy sources; Internal combustion engines; (Geo) thermal energy storage and conversion systems; Fundamental combustion of fuels; Energy resource recovery from biomass and solid wastes; Carbon capture; Land and offshore wells drilling; Production and reservoir engineering;, Economics of energy resource exploitation
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