矩形通道内航空煤油流动换热数值研究

针对先进动力装置利用航空煤油实现再生冷却的现实需求，建立了矩形冷却通道流/固/热耦合的三维数值模型，分析了入口质量流量、压力、热流密度等工况条件对矩形通道内航空煤油流动传热特性参数的影响。结果表明：增大质量流量和减小热流密度都会提升航空煤油的换热能力；在一定压力范围内，压力对航空煤油换热的影响不明显，但随着压力的增加，煤油的换热能力变差；由于传热恶化的发生，上述工况对压力损失和摩擦阻力的影响较为复杂。

A Numerical Study of Flow and Heat Transfer Characteristics of Aviation Kerosene in Rectangular Channel

In view of realizing an advanced power plant by using aviation kerosene to meet the needs of regenerative cooling, a three dimensional numerical model of fluid thermal structural coupling in the rectangular cooling channel is established, and the influence of working conditions, such as inlet flow mass rate, pressure and heat flux density on the flow and heat transfer characteristics of aviation kerosene in the rectangular cooling channel is analyzed. The results show that increasing the mass flow rate and reducing the heat flux density will definitely enhance the heat transfer ability of aviation kerosene. Within the range of a certain pressure, the influence of pressure on aviation kerosene heat transfer is not obvious, but with the increase of pressure, the heat transfer ability of aviation kerosene becomes worse. Due to the occurrence of heat transfer deterioration, the influence of the working conditions as mentioned above on the pressure loss and the friction resistance is comparatively complicated