The pre-swirl system is of great importance for temperature drop and cooling air supply. This study aims to investigate the influencing mechanism of heat transfer, nonuniform thermodynamic characteristics, and cooling air supply sensitivity in a pre-swirl system by the application of the flow control method of the pre-swirl nozzle. A novel test rig was proposed to actively control the supplied cooling air mass flow rate by three adjustable pre-swirl nozzles. Then, the transient problem of the pre-swirl system was numerically conducted by comparison with 60°, 120°, and 180° rotating disk cavity cases, which were verified with the experiment results. Results show that the partial nozzle closure will aggravate the fluctuation of air supply mass flow rate and temperature. When three parts of nozzles are closed evenly at 120° in the circumferential direction, the maximum value of the nonuniformity coefficient of air supply mass flow rate changes to 3.1% and that of temperature changes to 0.25%. When six parts of nozzles are closed evenly at 60° in the circumferential direction, the maximum nonuniformity coefficient of air supply mass flow rate changes to 1.4% and that of temperature changes to 0.20%. However, different partial nozzle closure modes have little effect on the average air supply parameters. Closing 14.3% of the nozzle area will reduce the air supply mass flow rate by 9.9% and the average air supply temperature by about 1 K.

预旋流系统对于温度下降和冷却空气供应非常重要。本研究旨在通过应用预旋流喷嘴的流量控制方法，研究预旋流系统中传热，不均匀的热力学特性和冷却空气供应灵敏度的影响机理。提出了一种新颖的试验台，以通过三个可调节的预旋喷嘴来主动控制所供应的冷却空气质量流量。然后，通过与60°，120°和180°旋转盘腔情况进行比较，对预涡流系统的瞬态问题进行了数值模拟，并通过实验结果进行了验证。结果表明，部分喷嘴关闭会加剧供气质量流量和温度的波动。当喷嘴的三个部分在圆周方向上以120°均匀地关闭时，空气供应质量流量的不均匀系数的最大值变为3.1％，而温度的均匀性系数的最大值变为0.25％。当六部分喷嘴在圆周方向上以60°均匀关闭时，空气供应质量流量的最大不均匀系数变为1.4％，温度的最大不均匀系数变为0.20％。但是，不同的部分喷嘴关闭模式对平均空气供应参数影响很小。关闭喷嘴面积的14.3％将使空气供应质量流量降低9.9％，平均空气供应温度降低约1K。当六部分喷嘴在圆周方向上以60°均匀关闭时，空气供应质量流量的最大不均匀系数变为1.4％，温度的最大不均匀系数变为0.20％。但是，不同的部分喷嘴关闭模式对平均空气供应参数影响很小。关闭喷嘴面积的14.3％将使空气供应质量流量降低9.9％，平均空气供应温度降低约1K。当六部分喷嘴在圆周方向上以60°均匀关闭时，空气供应质量流量的最大不均匀系数变为1.4％，温度的最大不均匀系数变为0.20％。但是，不同的部分喷嘴关闭模式对平均空气供应参数影响很小。关闭喷嘴面积的14.3％将使空气供应质量流量降低9.9％，平均空气供应温度降低约1K。