| 基于正交试验设计和模糊分析的船用柴油机燃烧系统参数匹配优化 |
| 投稿时间：2017-07-31 修订日期：2017-11-14 点此下载全文 |
| 引用本文：孙思远,黄朝霞,徐虎,黄加亮.基于正交试验设计和模糊分析的船用柴油机燃烧系统参数匹配优化[J].上海海事大学学报,2018,39(2):66-72. |
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| 基金项目:国家自然科学基金（51279066）；福建省自然科学基金（2017J01486） |
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| 中文摘要:为研究柴油机燃烧系统参数匹配对柴油机动力和排放性能的影响，利用AVL_BOOST和AVL_FIRE建立4190ZLC 2型船用柴油机整机模型和缸内燃烧高压循环模型，应用正交试验设计方法进行柴油机进气系统参数、喷油系统参数和燃烧室结构尺寸参数的仿真。利用模糊数学对仿真结果进行分析并优化。研究结果表明，通过模糊分析可以得出燃烧系统参数对4190ZLC 2型柴油机性能的影响主次顺序。将柴油机NOx排放和指示功率作为评价指标，并设置其权重分别为0.6和0.4时，优化后的参数为：喷孔直径0.30 mm、喷油提前角24°、油束夹角160°、涡流比0.4、喉口直径135 mm、凸台高度6.6 mm、凹坑半径18 mm。对应的指示功率为54 kW，与原机仿真值55 kW接近；NOx排放质量分数为0.009 86%，比原机仿真值0.022 50%低了56.02%。说明该优化方法在保证柴油机功率不损失的情况下可大幅降低NOx排放。 |
| 中文关键词:船用柴油机 正交试验设计 燃烧系统 模糊分析 参数匹配 参数优化 |
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| Parameter matching optimization of combustion system of marine diesel engine based on orthogonal experimental design and fuzzy analysis |
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| Abstract:In order to study the influence of parameter matching of combustion system on the power and emission performance of diesel engine, the whole engine model of 4190ZLC 2 type marine diesel engine and the high pressure circulation model of combustion in a cylinder are established by AVL_BOOST and AVL_FIRE. Intake system parameters, fuel injection system parameters and combustion chamber structure parameters of diesel engine are simulated by the orthogonal experimental design method. The simulation results are analyzed and optimized by fuzzy mathematics. The research results show that, the influencing sequence of combustion system parameters on the performance of 4190ZLC 2 type diesel engine can be obtained by fuzzy analysis. The diesel engine NOx emission and the indicated power are set as the evaluation indices, their weights are set to be 0.6 and 0.4, and the optimized parameters are as follows: the diameter of orifice 0.30 mm, the spray advance angle 24°, the spray angle 160°, the swirl ratio 0.4, the throat diameter 135 mm, the crown height 6.6 mm, and the bowl bottom radius 18 mm. The corresponding indicated power is 54 kW, which is similar to the original machine simulation value 55 kW. The corresponding NOx emission mass fraction is 0.009 86%, which is 56.02% lower than the original machine simulation value 0. 022 50%. It is proved that this optimization method can reduce NOx emission greatly without loss of diesel power. |
| keywords:marine diesel engine orthogonal experimental design combustion system fuzzy analysis parameter matching parameter optimization |
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