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为了探讨先进旋涡燃烧室流动传热特性,基于场协同原理,对不同来流速度、来流温度、壁面温度及燃气当量比下燃烧室的速度场、温度场及其场协同角分布进行了数值模拟。结果表明,协同角较小的区域主要分布在后钝体后侧、凹腔内部以及进气通道横向中心截面上。旋涡区可以强化换热。随着来流速度及来流温度的增大,场平均协同角呈递减趋势;随着壁温的提高,场平均协同角增大;当量比小于1.0时,场平均协同角随着当量比的增大而增大,而达到1.0之后变化不明显。对于速度场与温度场,燃烧室中心截面的场协同性能最好,且体平均协同角大于面平均协同角。
In order to discuss the heat transfer characteristics of the advanced vortex combustor, based on the field synergy principle, the distributions of the velocity field, the temperature field and the synergistic angle distribution of the combustion chamber under different flow velocities, incoming temperature, wall temperature and gas equivalence ratio were numerically simulation. The results show that the areas with smaller synergistic angles are mainly located on the back side of the bluff body, the inside of the cavity and the transverse center section of the intake passage. Whirlpool area can enhance heat exchange. With the increase of inflow velocity and incoming temperature, the average synergy angle of field decreases gradually. With the increase of wall temperature, the average synergy angle of field increases. When the equivalence ratio is less than 1.0, the average synergy angle of field increases with the equivalence ratio Increase and increase, and reach 1.0 after the change is not obvious. For the velocity field and the temperature field, the field synergy of the combustion chamber center section is the best, and the body average synergy angle is larger than the surface average synergetic angle.