| 孙豫,钱叶剑,唐彬彬,等.船舶中速柴油机喷油正时优化研究[J].内燃机工程,2022,43(6):8-17. |
| 船舶中速柴油机喷油正时优化研究 |
| Optimization of Fuel Injection Timing for A Marine Medium Speed Diesel Engine |
| DOI：10.13949/j.cnki.nrjgc.2022.06.002 |
| 关键词:船舶柴油机 喷油正时 燃烧相位 排放 |
| Key Words:marine diesel engine injection timing combustion phasing emission |
| 基金项目:安徽省科技重大专项（202003a05020023） |
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| 摘要:以船用中速柴油机为研究对象，采用计算机仿真和台架试验相结合的方法对喷油正时进行优化。首先基于相应机型的理论参数设计模拟工况，通过模拟结果分析缸内燃烧与污染物排放，得到理论值范围内的最优喷油正时。根据最优值进行台架试验，验证最优的喷油正时参数。模拟结果表明：缸内燃烧过程中心相位会随着喷油正时的提前而前移，但总体的燃烧持续期变化不明显。缸内最高燃烧压力会随喷油提前角加大而增加，在上止点前8°和上止点前9°出现明显增量，喷油提前角继续增大，压力变化不明显。模拟排放数据表明上止点前10°喷油正时工况中，污染物排放性能达到最佳。台架试验结果证明，上止点前10°喷油正时的试验工况中，缸内循环效率和污染物排放性能达到最佳。 |
| Abstract:Based on a marine medium-speed diesel engine， for the fuel injection timing， optimization of works were done by the computer simulation and bench experiment. Firstly， simulation test conditions were designed based on theoretical parameters. The data of combustion and pollutant emissions were analyzed， and the optimal fuel injection timing within the theoretical value range were obtained. Experiments were carried out according to the optimal values to verify the optimal fuel injection timing parameters. The simulation results showed that the center phase of combustion process moved forward with the advance of the injection timing， but the combustion duration did not change significantly. The maximum pressure of cylinder increased when the injection timing advanced. There were increments at 8° and 9° before top dead center， but the pressure did not change obviously with the increase of injection timing. The simulation data showed that the emission such as nitrogen oxides and soot were optimal in 10° before top dead center fuel injection timing. The bench test results showed that the collected cylinder pressure， heat release rate and pollutant emission were the best in the test condition that the fuel injection timing was 10° before top dead center. |
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