通过对反旋转风扇中注入空气来控制端墙流量的实验和数值研究
Maryam Sadoddin1, Hossein Khaleghi2
1Department of Aerospace Engineering, Amirkabir University of Technology, Tehran, 15875-4413, Iran.
Scientific reports
|July 2, 2025
概括
尖端空气注入通过消除尖端泄漏,有效地控制反旋转风扇中的停滞. 3.2%的注射量显著提高了性能,增加了压力上升和运行范围.
科学领域:
- 航空航天工程 航空航天工程
- 流体动力学 流体动力学
- 轮机的机械设备
背景情况:
- 尖端泄漏流量显著影响轮风扇的性能和机.
- 了解末壁流动结构对于反旋转风扇的停滞演变至关重要.
- 尖端关键风扇容易发生在叶片尖端附近的停机.
研究的目的:
- 调查反旋转风扇的尖端泄漏流量控制方法.
- 分析轴流体注射对端墙流量和停滞的影响.
- 为了评估不同注入量流率对风扇性能的影响.
主要方法:
- 使用五孔探头测量进行实验调查.
- 对实验数据进行验证的数值模拟 (半年环过渡).
- 信号处理技术包括快速里埃转换和波形转换分析.
主要成果:
- 机干扰集中在末壁附近,证实了风扇的尖端关键性质.
- 在机期间,在尖端区域确定了以旋转速度的40%旋转的模态波.
- 转子-2被确定为机启动的主要来源.
- 一个3.2%的尖端空气注入成功地消除了尖端泄漏.
结论:
- 高动量流体的轴向注射是控制尖端泄漏流量的有效方法.
- 3.2%的注入率显著提高了风扇性能,增加了总压力上升21%和稳定的运行范围59%.
- 尖端泄漏流量控制对于提高反旋转风扇的效率和稳定性至关重要.
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