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为了研究气冷环向稳定器张角对混合扩压器性能的影响规律,针对一种混合扩压器和气冷稳定器一体化新型结构,基于N-S方程建立了流场三维数值计算模型,采用数值模拟研究了气冷环向稳定器张角对混合扩压器流场、热混合效率和流动损失的影响规律。结果表明:在气冷稳定器的诱导作用下,外涵冷空气大量入侵内涵高温燃气,使内外涵流体之间进行强力掺混,大大提高了外涵冷空气温度;随着气冷环向稳定器张角的增大,稳定器堵塞比增大,流动损失增大,总压恢复系数减小;14°张角模型的混合扩压器总压恢复系数最大,其值为0.992,比最小值大0.002;此外,热混合效率随气冷环向稳定器张角的增加变化较小,加力燃烧室出口热混合效率最大值与最小值仅相差1.6%。
In order to study the effect of air-cooled loop stabilizer angle on the performance of hybrid diffuser, a new type of hybrid diffuser and air-cooled stabilizer integrated structure was established. Based on the NS equation, a three-dimensional numerical model of the flow field was established. The influence of air-cooled ring stabilizer angle on the flow field, thermal mixing efficiency and flow loss of the hybrid diffuser was simulated. The results show that under the induction of the air-cooled stabilizer, the cold air in the outer culvert interferes with the high-temperature gas with a large amount to strongly mix the inner and outer culverts, greatly increasing the temperature of the cold air in the outer culvert. As the air- When the angle of opening increases, the blockage ratio of the stabilizer increases, the flow loss increases, and the total pressure recovery coefficient decreases. The total pressure recovery coefficient of the hybrid diffuser with the 14 ° opening angle model is the largest with a value of 0.992, which is lower than the minimum value Large 0.002. In addition, the efficiency of thermal mixing changed little with the increase of the air-cooled ring to the stabilizer angle, and the maximum value of the thermal mixing efficiency at the outlet of the afterburner was only 1.6% of the minimum value.