| 摘要:基于CY4102BG四冲程自然吸气柴油机，利用GT-POWER一维仿真计算软件建立柴油机工作过程仿真模型，研究高原和水下工作环境对柴油机性能的影响。仿真结果表明：随着海拔的增高，柴油机有效功率有所下降，NOx排放上升，排气温度增加；随着水下排气背压的增高，柴油机有效功率下降，NOx排放显著上升。针对柴油机在非标况环境下NOx排放性能的恶化，通过调节喷油参数来优化柴油机综合性能。经优化，在不同工作环境下柴油机NOx排放降低7.3%~21.4%，优化效果较为明显。 |
| 关键词: 一维仿真 进气压力 排气背压 NOx排放 |
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| Simulation of the Influence of Working Environment on the Performance of Naturally Aspirated Diesel Engine |
| XU Haicheng,PAN Xinglong,MA Yucheng |
| Power Equipment Department， Chinese Naval Armament Department Project Management Center，Beijing 100071，China;College of Power Engineering，Naval University of Engineering，Wuhan 430033，China;College of Naval Architecture & Ocean Engineering，Naval University of Engineering，Wuhan 430033，China |
| Abstract:Based on CY4102BG four stroke diesel engine，a simulation model of diesel engine working process was established by using GT-POWER one-dimensional simulation software to study the influence of plateau and underwater working environment on diesel engine performance.The simulation results show that：With the increase of altitude，the effective power of diesel engine decreases，NOx emissions increase，and exhaust temperature increases；With the increase of underwater exhaust back pressure，the effective power of diesel engine decreases and NOx emissions increase significantly.Aiming at the deterioration of NOx emission performance of diesel engine in non-standard environment，the comprehensive performance of diesel engine was optimized by adjusting fuel injection parameters.After optimization，NOx emission of diesel engine in different working conditions was reduced by 7.3%~21.4%，and the optimization effect was obvious. |
| Key words: one-dimensional simulation intake pressure exhaust back pressure NOx emission |
