| 摘要: |
| 为了研究湍流的可压缩性效应对超声速燃烧的影响,对复杂的超声速横侧射流氢气/空气燃烧流场进行了数值模拟。采用修正的k-ε湍流模型(包括膨胀可压缩性和激波不稳定性两部分修正),考虑H2/Air详细化学反应机理(GRI-Mech2.11机理,10组分,28基元反应)。结果表明,可压缩性修正k-ε湍流模型能够预测复杂的超声速横侧射流流场结构。可压缩性使流体分离增强,湍流混合受到抑制,从而显著影响了超声速燃烧过程,数值模拟中需要考虑可压缩性效应的影响。 |
| 关键词: 压缩性效应 超音速燃烧 湍流模型 数值仿真 |
| DOI： |
| 分类号:V235 |
| 基金项目:国家自然科学基金(50776085) |
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| Numerical investigation of compressibility effects on supersonic combustion with transverse injection |
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HAN Xing-si, YE Tao-hong, ZHAO Ping-hui, ZHU Min-ming, CHEN Yi-liang
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Dept.of Thermal Science and Energy Engineering,China Univ.of Science and Technology,Hefei 230027,China
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| Abstract: |
| Supersonic combustion flow fields with transverse injection were simulated to study the compressibility effect utilizing the modified k-ε turbulence model including dilatational compressibility and shock unsteadiness effects with comprehensive kinetic mechanism of H2/air reaction GRI-Mech 2.11,10 components,28 elementary reactions.The results show that the modified k-ε model can resolve the complex supersonic flow field with transverse injection,and the flow separation is strengthened and turbulent mixing process depressed due to compressibility effect,resulted in that supersonic combustion flow fields are affected significantly.Thus,compressibility effect should be included in numerical simulations. |
| Key words: Compressibility effect Supersonic combustion Turbulence model Numerical simulation |
