수소가 첨가된 천연가스의 비정상연소특성에 대한 수치해석적 연구
A numerical study of unsteady combustion characteristics of H2 enriched natural gas
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초록
The increase of 1.5℃ global warming above the pre-industrial level has directly caused large risks of ecosystem and human life as well as severe changes in the climate. Electricity production in Korea is being achieved in a large portion(44% as of 2020) by coal thermal power generation during which it discharges greenhouse gases, PM and nitric oxide responsible for photochemical smog in a crowded city. The liquefied natural gas(LNG) is a powerful alternative of coal as a fuel generation because LNG emits less pollutants and is considered a clean fuel for thermal power generation. In the present study, combustion analyses have been numerically achieved on various mixed fuels of methane, ethane and hydrogen as a model of hydrogen enriched natural gas in a gas turbine combustor. GRI3.0 kinetic mechanism which consists of the 5 elements, 53 chemical species and 325 reaction steps has been used to calculate steady and unsteady combustion process of hydrogen enriched natural gas. Ignition delay time in a premixed flame has been numerically investigated through post-processing procedure to simulate gas turbine combustion in a thermal power station.
Abstract
The increase of 1.5℃ global warming above the pre-industrial level has directly caused large risks of ecosystem and human life as well as severe changes in the climate. Electricity production in Korea is being achieved in a large portion(44% as of 2020) by coal thermal power generation during which it discharges greenhouse gases, PM and nitric oxide responsible for photochemical smog in a crowded city. The liquefied natural gas(LNG) is a powerful alternative of coal as a fuel generation because LNG emits less pollutants and is considered a clean fuel for thermal power generation. In the present study, combustion analyses have been numerically achieved on various mixed fuels of methane, ethane and hydrogen as a model of hydrogen enriched natural gas in a gas turbine combustor. GRI3.0 kinetic mechanism which consists of the 5 elements, 53 chemical species and 325 reaction steps has been used to calculate steady and unsteady combustion process of hydrogen enriched natural gas. Ignition delay time in a premixed flame has been numerically investigated through post-processing procedure to simulate gas turbine combustion in a thermal power station.
참고문헌 (14)
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