| 分布式波浪前缘静子叶片对单级轴流风扇单音噪声影响的数值研究 |
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| 引用本文： | 同航,丁松,向康深,卯鲁秦,乔渭阳.分布式波浪前缘静子叶片对单级轴流风扇单音噪声影响的数值研究[J].推进技术,2021,42(10):2237-2248. |
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| 作者姓名： | 同航 丁松 向康深 卯鲁秦 乔渭阳 |
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| 作者单位： | 西北工业大学,西北工业大学,西北工业大学,西北工业大学,西北工业大学 |
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| 基金项目： | 国家自然科学基金资助项目 编号： 51776174 与 国家科技重大专项 编号： 2017-II-0008-0022 |
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| 摘 要： | 为了适应逐年严苛的适航噪声标准，改善飞机噪声环境，突破航空发动机降噪技术的瓶颈，有必要开发新的降噪手段以指导叶轮机械降噪设计。本文采用URANS与FW-H方程混合方法，通过将波浪前缘构型运用在叶片流动损失较大、声源强度较强的部分后，进一步观察其气动性能和降噪效果。研究表明：与基准叶片相比，分布式波浪前缘静子叶片可以在1BPF（Blade Passing Frequency）时降低风扇入口声功率级0.67~1.9dB，2BPF时降低风扇入口声功率级1.87~4.18dB，3BPF时降低风扇入口声功率级2.4~6.8dB，同时，总压比最高提升0.027%，等熵效率最高提升0.28%。因此，分布式波浪前缘静子叶片在叶轮机械降噪方面有很好的运用前景。
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| 关 键 词： | 波浪前缘叶片 单音噪声 声类比理论 风扇 FW-H方程 混合模型 |
| 收稿时间： | 2019/12/29 0:00:00 |
| 修稿时间： | 2021/8/4 0:00:00 |
Numerical Study on Tonal Noise Reduction of Single Axial Fan with Distributed Wavy Leading-Edge Stator |
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| TONG Hang,DING Song,XIANG Kang-shen,MAO Lu-qin,QIAO Wei-yang.Numerical Study on Tonal Noise Reduction of Single Axial Fan with Distributed Wavy Leading-Edge Stator[J].Journal of Propulsion Technology,2021,42(10):2237-2248. |
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| Authors: | TONG Hang DING Song XIANG Kang-shen MAO Lu-qin QIAO Wei-yang |
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| Affiliation: | Northwestern Polytechnical University,,,, |
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| Abstract: | In order to adapt to the severe airworthiness noise standards, improve the aircraft noise environment, and break through the bottleneck on noise reduction technology of aircraft engines, it is necessary to develop new noise reduction methods to guide the turbomachinery noise reduction design. In this paper, we study the aerodynamic performance and noise reduction effectiveness by applying wavy leading-edge to the part with larger flow loss and higher sound source intensity with the hybrid method of URANS and FW-H equation. The results show that, compared with base blade, the fan inlet Sound Power Level could been reduced respectively about 0.67~1.9dB at 1BPF, 1.87~4.18dB at 2BPF and 2.4~6.8dB at 3BPF by using those distributed wavy leading-edge stator. Meanwhile, total pressure ratio is increased up to about 0.027%, isentropic efficiency is increased up to about 0.28%. Therefore, the distributed wavy leading-edge stator has a good application prospect in the turbomachinery noise reduction. |
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| Keywords: | Wavy leading-edge blade Tonal noise Acoustic analogy Fan FW-H equations Hybrid method |
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