Variable mesh computational method for one-dimensional unsteady intake and exhaust flows of internal combustion engines

被引：0

作者：

Zhang K. ^{[1
,2
]}

Chen H. ^{[1
]}

Deng K. ^{[1
]}

Hu Z. ^{[3
]}

Qian Y. ^{[4
]}

Liu B. ^{[4
]}

机构：

[1] Key Laboratory for Power Machinery & Engineering of Ministry of Education, Shanghai Jiao Tong University, Shanghai

[2] Shanghai Marine Equipment Research Institute, Shanghai

[3] Shanghai Marine Diesel Engine Research Institute, Shanghai

[4] China Shipbuilding Power Engineering Institute Co., Ltd, Shanghai

来源：

Harbin Gongcheng Daxue Xuebao/Journal of Harbin Engineering University | 2022年 / 43卷 / 06期

关键词：

Intake and exhaust flow; Internal combustion engine; One-dimensional; Overall; Pressure wave; TVD format; Unsteady flow; Variable grid;

D O I：

10.11990/jheu.202102030

中图分类号：

学科分类号：

摘要：

To improve the computational accuracy of the intake and exhaust flow calculation model of internal combustion engines, this study proposes a variable-grid, one-dimensional, and nonconstant flow calculation method on the basis of the existing computational efficiency. Adopting the uniform grid TVD format, a nonuniform grid TVD iterative format is derived and established to calculate the intake and exhaust flow of internal combustion engines. Combined with adaptive mesh encryption technology, a numerical simulation method of a one-dimensional unsteady flow with variable mesh is established. Results show that compared with the simulation model of the whole engine with a uniform grid, the average CPU calculation time of the model with a variable grid increases by 2.08 s for 20 cycles, the maximum prediction accuracy of the exhaust pressure wave can be improved by 5.15%, and the maximum prediction accuracy of the whole engine performance can be improved by 0.54%. © 2022, Editorial Department of Journal of HEU. All right reserved.

引用

页码：809 / 816and920

共 11 条

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