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首页> 外文期刊>Engineering Applications of Computational Fluid Mechanics >Effect of Combustor Geometry on Performance of Airblast Atomizer Under Sub-Atmospheric Conditions
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Effect of Combustor Geometry on Performance of Airblast Atomizer Under Sub-Atmospheric Conditions

机译：低于大气压条件下燃烧室几何形状对鼓风雾化器性能的影响

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AbstractOne of the certification requirements that a jet engine has to fulfil is its altitude relight capability. Relighting an aero gas turbine engine at high altitudes is more challenging than at sea level conditions. The pressure, air velocity, and temperature within the combustor at such conditions are very low, hindering the fuel atomization and evaporation process. After ignition, combustion efficiency can be relatively low due to the poor fuel atomization quality, leading to slow shaft acceleration rates. Further studies in this field can help determine and predict the fuel spray characteristics, which limit the relight and pull-away capability of the engine at these sub-idle conditions. Reported in this paper is the CFD analysis of a typical airblast atomizer, simulated at different sub-idle operating conditions. Two sets of models were used; one with a simple liner-only combustor with co-flow air, and the other with a more detailed geometry, including wall cooling slots, primary and secondary dil...
机译：摘要喷气发动机必须满足的认证要求之一是其高度重新点燃能力。在高空重新点燃航空燃气涡轮发动机比在海平面条件下更具挑战性。在这样的条件下，燃烧器内的压力，空气速度和温度非常低，阻碍了燃料的雾化和蒸发过程。点火后，由于燃油雾化质量差，燃烧效率可能会相对较低，从而导致轴加速度降低。在该领域的进一步研究可以帮助确定和预测燃油喷雾特性，这限制了在这些子怠速条件下发动机的重燃和起重能力。本文报道的是典型的鼓风雾化器的CFD分析，在不同的亚空转运行条件下进行了仿真。使用了两组模型。一个带有一个简单的仅带衬套的燃烧器，带有并流空气，另一个带有更详细的几何形状，包括壁冷却槽，一次和二次稀释...

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