主流湍流度对涡轮导叶压力面扩张型气膜孔冷却特性的影响

Chunyi Yao, Huiren Zhu, Xinlei Li, Cunliang Liu, Bolun Zhang

科研成果: 期刊稿件文章同行评审

1 引用 (Scopus)

摘要

To investigate the influence of mainstream turbulence intensity on the film cooling characteristics of diffused film cooling holes on turbine vane pressure side, an experiment was carried out in the high subsonic wind tunnel, and the film cooling effectiveness and heat transfer coefficient downstream of the film hole row were measured by thermocouples. The inlet Reynolds number of the cascade ranged from 3.0×105 to 9.0×105, and the exit Mach number was 0.8. Two rows of single-row diffused film holes were located at the relative arc lengths of 25% and 70% on the pressure side. The high and low turbulence intensities were 14.7% and 1.3%, respectively. The experimental results show that for the row A, with the increase of the blowing ratio, the film cooling effectiveness increases first and then decreases in low turbulence intensity condition, while increases monotonously in high turbulence intensity condition. For the same blowing ratio condition, increased mainstream turbulence intensity strengthens the mixing of mainstream and coolant and enhances the dissipation of coolant, thus decreases the film cooling effectiveness. For the row B, elevated mainstream turbulence intensity decreases film cooling effectiveness at small blowing ratios, however suppresses the lift-off of coolant at large blowing ratios and increases film cooling effectiveness. The increase of blowing ratio significantly strengthens the heat transfer downstream of the row A, however has less effect on the row B. The increase of the mainstream turbulence intensity obviously raises the heat transfer coefficient ratio downstream of the row A and B. Overall, elevated mainstream turbulence intensity deteriorates the film cooling performance of the row A and B.

投稿的翻译标题Effects of Mainstream Turbulence Intensity on Film Cooling Characteristics of Diffused Holes on Turbine Vane Pressure Side
源语言繁体中文
页(从-至)58-69
页数12
期刊Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University
54
3
DOI
出版状态已出版 - 10 3月 2020

关键词

  • Diffused film cooling hole
  • Film cooling effectiveness
  • Heat transfer coefficient ratio
  • Mainstream turbulence intensity
  • Turbine vane

指纹

探究 '主流湍流度对涡轮导叶压力面扩张型气膜孔冷却特性的影响' 的科研主题。它们共同构成独一无二的指纹。

引用此