西华大学学报（自然科学版）2024，Vol.43Issue(5)：1-7,7.DOI:10.12198/j.issn.1673-159X.5456
掺氢航空发动机燃料的基础燃烧特性
Fundamental Combustion Characteristics of Jet Fuels Mixed with Hydrogen
摘要
Abstract
In response to the demand for aviation carbon neutrality,the effects of hydrogen addition on flame propagation,autoignition,and autoignition-assisted flame propagation for surrogate jet fuel were nu-merically investigated at engine conditions.Results show that for fuel-rich conditions,the normalized flame speed increases nonlinearly with increasing hydrogen ratio and can reach over 20,which poses great chal-lenges for avoiding flashback.For fuel-lean mixtures,the flame speed enhancement due to the flame tem-perature can be ignored,while cannot be for fuel-rich mixtures.For autoignition,there exists kinetic coup-ling for n-dodecane/hydrogen mixtures.Based on this,the diagram for autoignition risks is constructed,which indicates that hydrogen suppresses autoignition under subsonic cruising conditions,while it may sup-press or promote autoignition under supersonic cruising conditions,depending on the hydrogen mixing ra-tio and the combustor inlet temperature.For the coupling of flame propagation and autoignition,the one-dimensional calculations of autoignition-assisted flames demonstrate that,for the complex fuel with two-stage ignition,the first-stage ignition assistance can be eliminated when the mass fraction of hydrogen reaches 50%.关键词
掺氢/火焰传播/自着火/自着火协助/两阶段着火Key words
hydrogen addition/flame propagation/autoignition/autoignition assistance/two-stage ignition分类
能源科技引用本文复制引用
任祝寅,龚雪,暴秀超..掺氢航空发动机燃料的基础燃烧特性[J].西华大学学报（自然科学版）,2024,43(5):1-7,7.基金项目
国家自然科学基金项目(52406155). （52406155）
