STC/掺水燃烧技术对船用柴油机性能影响  

Effect of Sequential Turbo Charging Combined with Water-Blended Combustion Technology on Performance of Marine Diesel Engines

作　　者：杨捷波 王尚鹏 范金宇[1,3] 高占斌 陈明亮 罗旭康 YANG Jiebo;WANG Shangpeng;FAN Jinyu;GAO Zhanbin;CHEN Mingliang;LUO Xukang(School of Marine Engineering,Jimei University,Xiamen 361021,Fujian,China;Chinese People’s Armed Police Force Coast Guard Academy,Ningbo 315800,Zhejiang,China;Fujian Provincial Key Laboratory of Naval Architecture and Ocean Engineering,Xiamen 361021,Fujian,China)

机构地区：[1]集美大学轮机工程学院,福建厦门361021 [2]中国人民武装警察部队海警学院,浙江宁波支315800 [3]福建省船舶与海洋工程重点实验室,福建厦门361021

出　　处：《船舶工程》2022年第10期58-66,共9页Ship Engineering

基　　金：福建省自然科学基金项目(2018J01499;2021J01849)。

摘　　要：基于TBD234V6型柴油机,将原增压系统改造为相继增压系统,通过试验研究STC/掺水燃烧技术采用3%、6%、9%、12%和15%5个不同掺水率对柴油机性能的影响。结果表明:掺水率为0,负荷在10%~40%范围时,最高燃烧压力升高,燃油消耗率降低,碳烟排放量下降,但NO_(X)排放显著升高,25%负荷上升幅度最大,约75.4%;负荷在45%~100%时,与原机相比,柴油机动力性、经济性与排放性变化不大;随着掺水率增加,最高燃烧压力先上升后降低,燃油消耗率及碳烟排放量均呈先降后升的趋势,三者的趋势拐点均为3%掺水率,而NO_(X)排放量整体下降明显。之后,建立多目标灰色决策理论模型,选取25%负荷、50%负荷、100%负荷为低、中、高负荷的代表工况点,通过主客观赋权的方法计算得出STC/掺水燃烧技术的最优掺水率为9%。对该技术的性能进行了评估,表明柴油机STC/掺水燃烧技术能够很好的解决相继增压系统带来的NO_(X)排放高问题。同时,低负荷时,该技术相比原机,其动机性、经济性及排放性均有所提高,尤其在NO_(X)和碳烟排放方面最为显著,分别降低约19.4%和21.5%;而中高负荷时,在能够保证动力性、经济性及碳烟排放性能与原机水平相差不大的基础上,NO_(X)排放量大幅度降低,性能改善明显,表明该技术在柴油机节能减排方面具有一定的研究价值。Based on TBD234V6 diesel engine, the original supercharging system is transformed into a successive supercharging system, and the experiments are conducted to study the effects of successively supercharging and water-blended combustion technology using five different water-blending rates of 3%,6%, 9%, 12% and 15% on the performance of diesel engines. The results show that when the water mixing rate is 0 and the load is in the range of 10%~40%, the maximum combustion pressure increases, the fuel consumption rate decreases, and the soot emission decreases, but the NO_(X) emission increases significantly,and the 25% load increases the most, about 75.4%;when the load is in the range of 45%~100%, compared with the original engine, the diesel engine has little change in power, economy and emissions;as the water mixing rate increases, the maximum combustion pressure first rises and then decreases, and both the fuel consumption rate and the soot emissions show a trend of first decreasing and then increasing. The inflection points of the three trends are all 3% water mixing rate, while the overall NO_(X) emission decreases significantly. After that, a multi-objective grey decision-making theory model is established, and 25% load,50% load and 100% load are selected as representative operating points of low, medium and high loads,and the successive supercharging combined with mixing are calculated by subjective and objective weighting methods. The optimal water mixing rate of water combustion technology is 9%. Through the performance evaluation of the technology, the results show that the diesel engine adopts the sequential turbocharging combined with water admixed combustion technology, which can well solve the high NO_(X) emission caused by the sequential turbocharging system. At the same time, when the load is low, compared with the original machine, the technology improves the motivation, economy and emissions, especially in terms of NO_(X) and soot emissions, which are reduced by about 19.4% and 21.5%, respectively. At

关 键 词：柴油机 相继增压 掺水燃烧 灰色决策 最优掺水率 

分 类 号：U664.121[交通运输工程—船舶及航道工程]