为了揭示喷水冷却所引起湿空气环境对涡轮供气系统温度的影响，基于欧拉-拉格朗日多相流颗粒追踪方法，在预旋供气系统进口总压150 kPa和总温450 K条件下，开展湿空气对预旋供气系统温降的影响程度评估，分析预旋供气系统内旋转比和预旋喷嘴流量系数的变化规律，揭示预旋供气系统温降的影响规律。结果表明：在水汽比由0增加到0.3时，水汽比变化对预旋喷嘴内流动和温度变化影响显著，预旋喷嘴的气流旋转比由1.36增加到1.43，而其压比由1.523降低到1.482、流量系数由0.97降低到0.90，从而使预旋喷嘴温降由25.79 K减小到22.28 K；预旋供气系统温降由12.07 K降低到11.03 K。含湿条件会增加系统内流动阻力，限制了预旋供气系统降温能力，在涡轮叶片供气温度需求不变时，含湿条件将需要更高的供气压力。

To reveal the influence of the wet air conditions caused by water injection precooling on the temperature of the turbine air supply system, this paper focused on the influence evaluation of wet air on the temperature drop of preswirl air supply system under the conditions of total pressure of 150 kPa and total temperature of 450 K at the inlet of the preswirl air supply system based on EulerLagrangian multiphase flow particle tracking method. The variation laws of both swirl ratio of the system and flow coefficient of preswirl nozzle were analyzed in detail. The influence law of temperature drop of the preswirl air supply system was revealed. Results show that the water to steam ratio has a significant effect on the flow and temperature in preswirl nozzle as the water to steam ratio increases from 0 to 0.3. The airflow swirl ratio of preswirl nozzle increases from 1.36 to 1.43, while its pressure ratio decreases from 1.523 to 1482, and its flow coefficient drops from 0.97 to 0.90, thus reducing the temperature drop of preswirl nozzle form 25.79 K to 22.28 K; in particular, the temperature drop of preswirl air supply system is reduced from 12.07 K to 11.03 K. It can be concluded that the flow resistance in the system will increase under the system inlet conditions with humidity so as to limit the cooling ability of the preswirl air supply system. Therefore, the air supply pressure of the system will be required higher at the humidity conditions when the air supply temperature of the turbine blade is constant.

V235.1

航空发动机及燃气轮机基础科学中心项目（P2022AII007001）