Coupled heat transfer analysis of thrust chambers with recessed shear coaxial injectors
Coupled heat transfer analysis of thrust chambers with recessed shear coaxial injectors
复制标题
带有凹进剪切同轴喷油器的推力室的耦合传热分析
DOI：
10.1016/j.actaastro.2016.12.026
复制
发表时间：
2017
影响因子：
3.5
通讯作者：
Bing
中科院分区：
文献类型：
--
作者：
Jiawen Song;Bing
为了研究凹入长度对具有剪切同轴喷射器的液氧/甲烷推力室中燃烧性能和热负荷的影响，开发了一种耦合数值方法来解决具有再生冷却的推力室中的燃烧和传热问题。在该方法中，跨临界湍流燃烧通过考虑真实流体特性的经过验证的非绝热小火焰模型进行建模；推力室和冷却通道内的湍流通过基于压力的耦合算法进行计算。验证表明，详细化学机理和Chung方法的预测与文献实验数据定量相符。结果表明，凹槽导致整个推力室壁面热通量增加，并使燃烧室热通量峰值向下游移动。此外，随着凹进长度的增加，燃烧室和喷嘴中的热通量峰值先增加后减少。同时，燃烧室压力、热气温度和燃烧室壁的平均热通量与凹陷长度呈正相关。然而，热负荷对凹进长度比室压力和热气体温度更敏感。应高度重视室壁的保护。
To investigate the effects of recessed lengths on combustion performance and heat loads in LOX/methane thrust chambers with shear coaxial injectors, a coupled numerical methodology is developed to solve the combustion and heat transfer in thrust chambers with regenerative cooling. In this methodology, the transcritical turbulent combustion is modeled by a validated non-adiabatic flamelet model considering real-fluid properties; turbulent flows within the thrust chamber and cooling channels are computed by a pressure-based coupled algorithm. The validation indicates that the prediction with detailed chemistry mechanism and the Chung method confirms quantitatively to literature experimental data. The results reveal that the recess causes an increase of wall heat flux in the whole thrust chamber and makes the heat flux peak in the combustion chamber moves downstream. Furthermore, both the heat flux peaks in the combustion chamber and nozzle increase first and then decrease as recessed lengths increase. Meanwhile, chamber pressure, hot-gas temperature, and the averaging heat flux of the combustion chamber wall are positively correlated with recessed lengths. However, the heat loads are more sensitive to the recessed lengths than chamber pressure and hot-gas temperature. Much attention should be paid to the protection of chamber wall.
喷射器几何形状对超临界压力低温同轴射流的影响
DOI：
--
发表时间：
2009
期刊：
影响因子：
--
作者：
Hideaki Komiyama;Tomokazu Iyoda;Kaori Kamata;込山英秋;Hideaki Komiyama;込山英秋;Hideaki Komiyama;Hideaki Komiyama;Hideaki Komiyama;込山英秋;Hideki Komiyama;Hideki Komiyama;Hideki Komiyama;込山英秋;込山英秋;谷洋海;谷洋海;谷洋海;谷洋海;谷洋海;谷洋海;谷洋海
通讯作者：
谷洋海