| LIU Xiao-ke 1 ， LIU En-hui 2 ， LIU Xiao 3.Research Progress on Fuel-Air Premixing Method and Performance[J].航空发动机,2024,50(3):9-16 |
| Research Progress on Fuel-Air Premixing Method and Performance |
| DOI： |
| Key Words:low emissions combustion chamber gas turbine NO X emission premixing uniformity |
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| Abstract:With the increasingly stringent emission standards of air pollutants， low-emission combustion technology has become one
of the key technologies in the development of advanced gas turbines. The uniformity of fuel-air premixing is the key factor affecting NOx
generation in a low-emission combustion chamber with gaseous fuel. Based on the mechanism of pollutant generation and control methods，
the relationship between premixing uniformity and NO X emissions is pointed out， the better the uniformity， the less NOx emissions.
According to existing research contents， the research progresses on improving fuel-air premixing uniformity in low-emission combustion
chambers at home and abroad is summarized from four aspects： the structural parameters， swirl/turbulence intensity， premixing distance，
and boundary conditions （temperature and pressure）. It is suggested that the premixing uniformity can be improved by increasing the swirl
number， fuel penetration depth， premixing length， etc. It is pointed out that the prediction of fuel and premixing uniformity in small-size
and short-distance space is lacking in recent research. Based on the technical level and development trend of low-emission combustion
chamber ， it is believed that the future research direction should be the quantitative prediction and evaluation of fuel-air premixing
uniformity in short-distance and confined spaces. |
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