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对微子发生器对薄膜冷却效应的数值研究
1Department of Mechanical Engineering, Ferdowsi University of Mashhad, P.O.B. 91775-1111, Mashhad, Iran.
Scientific reports
|November 22, 2025
概括
微发电机 (MVG) 通过优化喷气机的附着和扩散,显著提高了轮叶片膜的冷却. 最佳的位置是5-7.5毫米上游,高度是2.5-4.0毫米,可使冷却效率提高33-46%.
科学领域:
- 轮机的机械设备
- 热传递是一种热传递.
- 空气动力学 航空动力学
背景情况:
- 薄膜冷却对于保护轮机叶片免受极端温度的影响至关重要,这会影响效率和安全.
- 微发电机 (MVG) 是被动设备,用于提高薄膜冷却性能.
- MVG几何形状和位置对冷却性能的确切影响需要进一步研究.
研究的目的:
- 为了研究MVG高度,轴位置和尖端角度对片在定子刀片上的冷却的影响.
- 分析不同MVG参数对空气动力学和热性能的影响.
- 为了确定最佳的MVG配置,以增强轮叶片的冷却.
主要方法:
- 对MVG高度 (1.55.5mm),轴位置 (−7.5到+7.5mm) 和尖端角度 (±5°) 的实验性评估.
- 测量包括动动能 (TKE),表面压力,温度,薄膜冷却效率和压力损失.
- 分析空气动力学和热性能指标,以确定冷却效率.
主要成果:
- 2.54.0毫米的MVG高度产生了稳定的,提高了混合和冷却的有效性.
- 发现最优的轴位置是上游57.5毫米,保持旋连贯性并抑制喷气式起飞.
- 最好的MVG配置比基线改善了33%-46%的表面冷却,在关键的叶片区域有显著的收益.
结论:
- MVG的几何和位置极大地影响了薄膜冷却性能;特定的范围是最佳的.
- 精心设计的MVG对于持续有效地冷却轮机叶片中的薄膜至关重要.
- 这项研究为优化MVG设计在燃气轮机应用中提供了有价值的数据.
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