Optimization Design and CFD Study of Nature Gas Engine Inlet

Abstract:

By adopting CFD numerical simulation software, the steady numerical simulation of original engine inlet is carried on. On base of the original one, two new inlets are redesigned and their velocity fields are analyzed. From the simulation of CFD, we can learn that with the different inlet, the average flow velocity increases when the swirl ratio rises in same cross-section. Then the experiment of inlets with different geometry is carried on. Considered various kinds of performance of the engine, we found that the swirl ratio which is generated by the inlet should not be too high, but it also is not good with too low swirl ratio. In this investigation, comprehensive consideration of economy and power, the no.1 inlet is selected as the best one for the next study.

• Periodical: Advanced Materials Research (Volumes 655-657)
• Pages: 315-319
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.655-657.315
• Online since: January 2013
• Authors: Yun Jing Jiao, Peng Kun Si, Zi Li Zhang
• Keywords: Computational Fluid Dynamics (CFD), Inlet Port, Internal Combustion Engine (ICE)

References

[1] Wang Fujun, Computational Fluid Dynamic Analysis, Beijing: Tsinghua University Press, (2004).

[2] Si Pengkun, Ivestigations of Combustion Process in SI CNG Engine for Conforming the Chinese State Emission Standard IV，Doctoral dissertation, Tianjin: Tianjin university, (2006).

[3] G. Fontana,E. Galloni and R. Palmaccio, Development of a new intake system for a small spark-ignition engine. modeling the flow through the inlet valve，SAE 2003-01-0369.

DOI: 10.4271/2003-01-0369

[4] AVL FIRE V8. 5 Userguide.