| Autor: |
Li, Jun, Gurgenci, Hal, Guan, Zhiqiang, Wang, Jiaxin, Huang, Zhenyu, Wang, Chen |
| Zdroj: |
Heat & Mass Transfer; Jan2025, Vol. 61 Issue 1, p1-16, 16p |
| Abstrakt: |
The cooling characteristic experimental rig of rotor system is designed and manufactured, which mainly includes SCO2 turbine shafting, electric spindle, PLC control system, electromagnetic heating device and cooling device. A high precision infrared thermal imager was used to evaluate the impact cooling characteristics of a small gap annular gas jet. The small gap annular gas jet impingement cooling characteristic experiment was completed using a high-precision infrared thermal imaging instrument. The experiment studied the influence of cooling medium temperature and pressure on the axial temperature distribution of the shaft. The results show that the small gap cooling device with incoming airflow interacts with the shaft journal, a significant temperature gradient is formed between the shaft journal and the heat source, thereby effectively controlling the shaft journal temperature. Under the condition that the heat source temperature at the end of the cantilever is approximately constant, the average temperature attenuation rate of the journal decreases gradually with the increase of the pressure difference between the inlet and outlet of the cooling device. Therefore, the mass flow rate of the cooling medium can be controlled by reducing the constrained gap of the jet impact of the gas array, and the mass flow utilization rate of the cooling medium can be improved. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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