刘应材,雷基林,申立中,等.柴油机高原适应性研究及压气机流场分析[J].内燃机工程,2021,42(5):1-7.
柴油机高原适应性研究及压气机流场分析
Study on Plateau Adaptability of Diesel Engine and Analysis of Compressor Flow Field
DOI：10.13949/j.cnki.nrjgc.2021.05.001
关键词:柴油机  高原适应性  流场分析  压气机效率
Key Words:diesel engine  plateau adaptability  flow field analysis  compressor efficiency
基金项目:国家自然科学(51965027)
作者单位E-mail
刘应材 昆明理工大学云南省高原排放重点实验室 2245247762@qq.com 
雷基林* 昆明理工大学云南省高原排放重点实验室 leijilin@sina.com 
申立中 昆明理工大学云南省高原排放重点实验室  
邓晰文 昆明理工大学云南省高原排放重点实验室  
宋国富 昆明云内动力股份有限公司  
刘康 昆明云内动力股份有限公司  
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摘要:基于试验测试数据建立增压柴油机的仿真模型,开展0～4000m高原适应性研究工作,研究增压柴油机性能以及压气机性能海拔变化关系,并研究不同海拔下压气机内部流动状况,分析压气机效率下降原因,为探究压气机流场控制措施以及压气机性能优化提供参考。研究结果表明：高海拔工况下,柴油机功率、扭矩与燃油消耗率下降；进气流量减少,增压压力下降,压气机压比增大,效率下降。压气机子午面的相对总压的低压区域压力较小,叶顶间隙间及叶轮出口高熵区域增大且范围提前。跨音速流区域增大,激波损失增大；叶顶间隙流加强,泄露损失增大,分流叶片后缘主流与低速泄露流掺混,尾迹区域增大,掺混损失增加,压气机叶轮内部损失增大,因此高原环境下,压气机效率降低。
Abstract:Based on the test data, the simulation model of turbocharged diesel engine is established, and the adaptability research of 0 – 4000 m plateau is carried out. The relationship between the performance of turbocharged diesel engine and the altitude variation of compressor performance is studied. The internal flow conditions of compressor at different altitudes are studied, and the reasons for the decline of compressor efficiency are analyzed, which provides reference for exploring the control measures of compressor flow field and the optimization of compressor performance. The results show that the power, torque and fuel consumption rate of diesel engine decrease under high altitude conditions. The inlet flow decreases, the pressure increases, the compressor pressure ratio increases, and the efficiency decreases. The pressure in the low pressure region of the relative total pressure on the compressor meridian plane is small, and the high entropy region between the tip clearance and the impeller outlet increases and the range is advanced. As the transonic flow region increases, the shock wave loss increases ; The tip clearance flow is strengthened, the leakage loss is increased, the mainstream of the trailing edge of the splitter blade is mixed with the low-speed leakage flow, the wake area is increased, the mixing loss is increased, and the internal loss of the compressor impeller is increased, so the compressor efficiency is reduced in the plateau environment.
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