| 摘要:在共轨柴油机上采用双层交错布置喷孔油嘴可以改善柴油机的经济性和排放性能。针对双层交错布置喷孔油嘴与燃烧室优化匹配问题，采用CFD软件，运用中心组合试验设计方法设计燃油系统参数的试验计算矩阵并进行数值计算；再以响应面近似模型构造燃烧和排放的优化目标函数；最后运用多岛遗传算法对该近似模型进行全局寻优，确定燃油系统参数的优化组合，并在试验台架上进行了优化方案的配机试验。结果表明:小的喷孔直径、较多的喷孔以及适当的上下层喷孔喷射夹角可提高油束的雾化质量。 |
| 关键词: 喷油嘴 燃油系统 响应面模型 参数 优化 |
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| Optimization of Double-Layer Nozzle ParametersBased on Response Surface Approximation Model |
| Gong Xinrui,Liu Zhenming,Huang Xinyuan,Liu Nan |
| Naval University of Engineer,Hubei Wuhan 430033 |
| Abstract:The double-layer staggered nozzles used on the common rail diesel engines can improve the economy and emission performance of the diesel engines. In order to optimize the matching between the two-stage staggered nozzle and the combustion chamber, the CFD calculation software and the central combined test design method were used to design the test calculation matrix of the fuel system parameters for numerical calculation, and then constructed the optimization objective function of combustion and emission with the response surface approximation model. Finally, the multi-island genetic algorithm was used to globally optimize the approximate model, the optimal combination of fuel system parameters was determined, and bench test was carried out to verify the optimization program. The results show that small injection hole diameter, more injection holes and appropriate injection angle of the upper and lower rings of injection holes could help to improve the atomization quality of fuel spray. |
| Key words: nozzle fuel system response surface model parameter optimization |
