Combined effects of the inlet temperature and species distortion on hydrogen turbines aero-thermal performance
Combined effects of the inlet temperature and species distortion on hydrogen turbines aero-thermal performance
复制标题
入口温度和物质畸变对氢涡轮机气动热性能的综合影响
DOI:
10.1177/0957650915621416
复制
发表时间:
2016-02
期刊:
影响因子:
--
通讯作者:
Xin Yuan
中科院分区:
文献类型:
--
作者:
Zhong-Nan Wang;Xin Yuan
The composition of combusted gases in hydrogen turbines is different from that of the combustor cooling/dilution air, which introduces the non-uniformities in both the temperature and gas species at the turbine inlet. The concurrent effects of these two non-uniformities on the aero-thermal performance are investigated in this paper on hydrogen turbines. First knowledge is obtained that the species inlet distortion, on top of the hot streak, has an essential role in changing the blade thermal loading and increasing aerodynamic loss. The species concentrations promote the hot fluid to move towards the rotor pressure side and enhance the hot streak radial migration. Based on the numerical simulation, the maximum blade temperature is increased by 5% of inlet temperature variation (25K), on the pressure surface. Finally, the understandings of species distortion effects on hydrogen turbines are extended to a range of gas species concentrations with practical guidelines provided for hydrogen turbines cooling design.
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