| 黄振琛,章标仂,邵家存,严微微,王玉刚.超低温冰箱风扇降噪的数值模拟研究[J].,2025,44(5):1279-1287 |
| 超低温冰箱风扇降噪的数值模拟研究 |
| Numerical Simulation Study on Noise Reduction of Ultra-Low Temperature Refrigerator Fans |
| 投稿时间：2024-05-01 修订日期：2025-09-02 |
| 中文摘要: |
| 本文以超低温冰箱风扇作为研究对象，采用数值模拟为主、实验测试为辅的方法，对一款典型的超低温冰箱风扇叶片的结构进行优化，有效降低了风扇高速旋转产生的噪声。由于对曲面倾斜的风扇叶片绘制难度很大且误差较大，因此使用3D扫描方法和网格修补技术处理风扇叶片并建立模型，利用ANSYS meshing软件划分网格后进行数值模拟，对比数值模拟与实验测试结果，验证了数值模拟方法的准确性和可行性。在此基础上，通过对流场和声场分析后发现风扇叶片表面的压力和涡量分布不均匀，且风扇噪声由偶极子主导，由此提出了条纹状和锯齿状两种风扇叶片结构的优化方案。数值模拟结果表明：原风扇叶型产生的总声压级噪声为53.78 dB，大条纹叶型产生的总声压级噪声为52.32 dB，大锯齿叶型产生的噪声为51.81 dB，两种结构优化方案分别降低噪声1.56dB和1.97dB，提升了超低温冰箱的性能及其市场竞争力。研究结果有助于为未来低噪高性能超低温冰箱的设计和开发提供科学依据。 |
| 英文摘要: |
| This study focuses on the fan blades of ultra-low temperature refrigerators, employing numerical simulation as the primary method and experimental testing as a secondary approach, to optimize the structure of a typical ultra-low temperature refrigerator fan blade, effectively reducing the noise generated by high-speed rotation. Given the challenges and inaccuracies in drawing the curved and inclined fan blades, a 3D scanning method was utilized to model the blades, followed by mesh division using ANSYS meshing software for numerical simulation. The accuracy and feasibility of the numerical simulation method were validated by comparing the simulation results with experimental testing. Further analysis of the flow field and sound field revealed uneven pressure and vortex distribution on the surface of the fan blades, with the noise predominantly caused by dipoles. Consequently, two structural optimization schemes for the fan blades, namely striped and serrated designs, were proposed. The numerical simulation results indicate that the overall sound pressure level (OASPL) noise generated by the original fan blade design is 53.78 dB. The overall sound pressure level noise generated by the large striped blade design is 52.32 dB, and that generated by the large serrated blade design is 51.81 dB. The two structural optimization schemes reduce noise by 1.56 dB and 1.97 dB, respectively, enhancing the performance and market competitiveness of ultra-low temperature freezers. The findings provide a scientific basis for the design and development of future low-noise, high-performance ultra-low temperature refrigerators. |
| DOI：10.11684/j.issn.1000-310X.2025.05.018 |
| 中文关键词: 超低温冰箱 结构优化 风扇降噪 数值模拟 |
| 英文关键词: ultra-low temperature freezer structural optimization fan noise reduction |
| 基金项目: |
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