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《Diesel Engine》 2019-06
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Optimization of Double-Layer Nozzle Parameters Based on Response Surface Approximation Model

Gong Xinrui;Liu Zhenming;Huang Xinyuan;Liu Nan;Naval University of Engineer;  
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.
【Fund】: 国家自然科学基金(51879269);; “十三五”国防预研项目(3020401030303)
【CateGory Index】: TK421
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