Combustion characteristics in a pre-vaporizing pre-mixing lean combustor for an automotive ceramic gas turbine
Conference
·
OSTI ID:20019068
A pre-vaporizing pre-mixing lean combustor (PPL) was developed for an automotive ceramic gas turbine which had high thermal efficiency and clean exhaust emissions. This study has been performed to obtain design data by investigating the basic characteristics of this combustor. Experiments were conducted under a high combustor inlet air temperature of 973K since the combustor inlet air was heated by regenerators to achieve high thermal efficiency. At first, the following measurements were conducted to survey the phenomena in the PPL combustion system; the required distance of vaporizing tube for complete evaporation and uniform mixture formation, and the flow pattern and velocity distribution and flame behaviors in the combustion chamber. Then it has clarified how the emission characteristics were influenced by non-uniformity of the mixture that flew into the combustion chamber. And also the possibility of reducing NOx emission by introducing dilution air into the post flame region has been shown.
- Research Organization:
- Japan Automobile Research Inst., Inc., Tsukuba, Ibaraki (JP)
- OSTI ID:
- 20019068
- Country of Publication:
- United States
- Language:
- English
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