Effects of DPF at Different Altitudes on Diesel Engine Performance and Its Flow Characteristics

被引：0
作者：
Chen G. [1 ]
Zhang H. [1 ]
Chen J. [1 ]
Luo Y. [2 ]
Peng Y. [3 ]
Li C. [3 ]
机构：
[1] Yunnan Key Laboratory of Internal Combustion Engine, Kunming University of Science and Technology, Kunming
[2] Unit 31638 of the Chinese People's Liberation Army, Kunming
[3] Kunming Yunnei Power Company Limited, Kunming
来源：
Neiranji Xuebao/Transactions of CSICE (Chinese Society for Internal Combustion Engines) | 2022年 / 40卷 / 06期
关键词：
Diesel engine; Diesel particulate filter; Flow field; Pressure drop;
D O I：
10.16236/j.cnki.nrjxb.202206063
中图分类号：
学科分类号：
摘要：
A one-dimensional thermodynamic simulation model of a high-pressure common rail diesel engine and a calculation model of the diesel particulate filter(DPF) were established. The influences of the structure and ash content of the DPF carrier on the engine and DPF performances were studied at different altitudes. The ash distribution coefficients, the internal flow field and particle deposition characteristics of the DPF ducts were explored. The research results show that with the increase in altitude, the power and fuel economy of the diesel engine decrease significantly. Among them, the asymmetric pore structure carrier has the least impact on the engine performance, and the pressure drop and collection efficiency of the three different carrier structures increase. With the increase of ash distribution coefficient, the pressure drop and capture efficiency increase, but the centerline velocity and the pressure of the outlet channel gradually decrease. In addition, the increase of ash content causes the DPF pressure drop and the collection efficiency to rise slightly, but the altitude change does not affect them. As the altitude increases, the velocity and pressure of the airflow in the inlet and outlet channels increase. As a result, the particle velocity increases, the nonuniformity of particle concentration is enhanced, and the particles gradually concentrate toward the rear end of the channel. © 2022, Editorial Office of the Transaction of CSICE. All right reserved.
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页码：504 / 512
页数：8
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