Simulation modeling method and experimental investigation on the uniflow scavenging system of an opposed-piston folded-cranktrain diesel engine

Fukang Ma*, Zhenfeng Zhao, Yangang Zhang, Jun Wang, Yaonan Feng, Tiexiong Su, Yi Zhang, Yuhang Liu

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)

Abstract

The scavenging process for opposed-piston folded-cranktrain (OPFC) diesel engines can be described by the time evolution of the in-cylinder and exhaust chamber residual gas rates. The relation curve of in-cylinder and exhaust chamber residual gas rate is called scavenging profile, which is calculated through the changes of in-cylinder and exhaust chamber gas compositions determined by computational fluid dynamics (CFD) simulation. The scavenging profile is used to calculate the scavenging process by mono-dimensional (1D) simulation. The tracer gas method (TGM) is employed to validate the accuracy of the scavenging profile. At the same time, the gas exchange performance under different intake and exhaust state parameters was examined based on the TGM. The results show that the scavenging process from 1D simulation and experiment match well, which means the scavenging model obtained by CFD simulation performs well and validation of its effectiveness by TGM is possible. The difference between intake and exhaust pressure has a significant positive effect on the gas exchange performance and trapped gas mass, but the pressure difference has little effect on the scavenging efficiency and the trapped air mass if the delivery ratio exceeds 1.4.

Original languageEnglish
Article number727
JournalEnergies
Volume10
Issue number5
DOIs
Publication statusPublished - May 2017

Keywords

  • Computational fluid dynamics (CFD)
  • Opposed-piston folded-cranktrain (OPFC) diesel engine
  • Tracer gas method
  • Uniflow scavenging system
  • Validation method

Fingerprint

Dive into the research topics of 'Simulation modeling method and experimental investigation on the uniflow scavenging system of an opposed-piston folded-cranktrain diesel engine'. Together they form a unique fingerprint.

Cite this

Ma, F., Zhao, Z., Zhang, Y., Wang, J., Feng, Y., Su, T., Zhang, Y., & Liu, Y. (2017). Simulation modeling method and experimental investigation on the uniflow scavenging system of an opposed-piston folded-cranktrain diesel engine. Energies, 10(5), Article 727. https://doi.org/10.3390/en10050727