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Combined Effects of Intake Oxygen Enrichment, Intake Pressure and Temperature on Combustion Behavior and Emission Characteristics of a Small-scaled Rotary Engine by Run Zou; Jinxiang Liu; Nana Wang; Huichao Jiao is a Engineering article available to read on EtoBox.

What is Combined Effects of Intake Oxygen Enrichment, Intake Pressure and Temperature on Combustion Behavior and Emission Characteristics of a Small-scaled Rotary Engine about?

Intake oxygen enrichment has a promising potential to improve the combustion performance of a small-scaled rotary engine (RE) operating at high altitudes. However, the process is complicated because the intake temperature and pressure are sensitive to altitudes as well as the elongated rotor chamber. In this study, a three-dimensional CFD simulation model coupling with a suitable turbulent model and a reduced chemical kinetic mechanism was established and validated. The combined effects of intake oxygen enrichment as well as intake pressure and temperature under different altitudes on early flame growth, combustion behavior, and emission characteristics of small-scaled REs were numerically investigated. Results showed that intake oxygen enrichment promotes the formation of OH, O, H radicals, which leaded to the significant improvements of the early flame growth, especially for the flame near leading spark plug. The promotion effect due to intake oxygen enrichment became weak with increasing altitude. Moreover, the early flame growth duration at high altitudes was more dramatically shortened by intake oxygen enrichment than that at low altitudes. It is interesting to note that when

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Author

Run Zou; Jinxiang Liu; Nana Wang; Huichao Jiao

Publisher

Elsevier BV

Published

2022

Language

EN

Field

Engineering (Physical Sciences)