Numerical investigation on heat transfer characteristics of twin-web turbine disk-cavity system

Ma, Aichun; Liu, Feifan; Zhou, Tian; Hu, Rong

doi:10.1016/j.applthermaleng.2020.116268

Cited by 9 publications

(3 citation statements)

References 16 publications

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“…Because of the input power in the rotating coordinate system, th tive total temperature in the rotating cavity tends to increase with increasing radius pared with the radial pre-swirl system without impellers, the relative total tempera the outlet of the radial pre-swirl system with impellers is reduced by 0.3K. It is cru note that the effect of the impellers on the relative total temperature is weak due low swirl ratio limiting the pressurization efficiency, which is consistent with the th ical investigation (see Equation (22)). Figure 9 shows the relative total pressure in the rotors.…”

Section: Flow Structure and Distribution Of Pressure And Temperaturesupporting

confidence: 85%

“…Shen et al [17] have shown that there is no significant increase in density in the rotating cavity, due to the low swirl ratio limiting the pressurization efficiency of the rotating cavity. Thus, under ideal conditions (flow rate is constant and leakage is ignored), Equation (22) indicates that the impellers have no significant effect on the system temperature drop.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…Xia et al [21] proposed a double-row pre-swirl nozzle to improve heat transfer at a high radius. Ma et al [22,23] optimized the pre-swirl nozzles and receiver holes in a twin-web turbine disk to decrease the disk temperature and temperature non-uniformity. Furthermore, Taamneh [24] attempted to employ heat pipes to transfer heat from the hot end to the cold end to make the temperature on the turbine disk more uniform.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Impellers on the Cooling Performance of a Radial Pre-Swirl System in Gas Turbine Engines

Shen,

Wang,

Liang

2024

Aerospace

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Impellers are utilized to increase pressure to ensure that a radial pre-swirl system can provide sufficient cooling airflow to the turbine blades. In the open literature, the pressurization mechanism of the impellers was investigated. However, the effect of impellers on the cooling performance of the radial pre-swirl system was not clear. To solve the aforementioned problem, tests were carried out to assess the temperature drop in a radial pre-swirl system with various impeller configurations (impeller lengths l/b ranging from 0 to 0.333). Furthermore, numerical simulations were used to investigate the flow and heat transfer characteristics of the radial pre-swirl system at high rotating Reynolds numbers. Theoretical and experimental investigations revealed that the pre-swirl jet and output power generate a significant temperature drop, but the impellers have no obvious effect on the system temperature drop. By increasing the swirl ratio, the impellers reduce the field synergy angle and thus improve convective heat transfer on the turbine disk. In addition, increasing the impeller length can reduce the volume-averaged field synergy angle and improve heat transfer, but the improvement effectiveness decreases as the impeller length increases. Thus, the study concluded that impellers could improve the cooling performance of the radial pre-swirl system by enhancing disk cooling.

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Section: Flow Structure and Distribution Of Pressure And Temperaturesupporting

confidence: 85%

Section: Theoretical Analysismentioning

confidence: 99%