摘要
吸油烟机是一类以风机为核心部件用作输送空气的家用电器,对家庭厨房烹饪过程中产生的烟气净化具有重要作用。其中噪声是影响产品使用体验的重要因素,也是消费者选购时重点关注的方面。计算流体力学(CFD)技术在家电行业中针对流体机械设计、风机风道流场优化仿真应用基本已成熟。使用计算流体力学软件对一款使用轴流叶轮的外销车载吸油烟机进行优化,在轴流叶片外缘设计了一种导流环结构;数值仿真发现,增加导流环结构可阻隔气流从叶尖间隙沿径向路径泄漏,降低径向泄漏气流对主流向气流(轴向进气)的冲击和扰动,减少叶尖对径向气流的切割,在改善气流泄漏量的同时提升了扇叶的风量、效率及湍流噪声。实验测试结果显示,车载吸油烟机轴流扇叶增加导流环结构对整机噪声降低贡献约2.89 dB(A)。
A range hood is a type of household appliance that uses a fan as the core component to transport air,and plays an important role in purifying the smoke generated during the cooking process in the kitchen.Noise is an important factor that affects the user experience of products and is also a key aspect that consumers pay attention to when making purchases.Computational Fluid Dynamics(CFD)technology has been widely used in the home appliance industry for fluid mechanical design and optimization simulation of fan duct flow fields.Using computational fluid dynamics to optimize an export vehicle mounted range hood using axial flow impellers,and design a guide ring structure on the outer edge of the axial flow blades.Through numerical simulation,it was found that adding a guide ring structure can block the leakage of airflow along the radial path from the blade tip gap,reduce the impact and disturbance of radial leakage airflow on the mainstream airflow(axial intake),reduce the cutting of radial airflow by the blade tip,improve airflow leakage,and increase the airflow,efficiency,and turbulent noise of the fan blades.The experimental test results show that adding a guide ring structure to the axial flow fan blades of the vehicle mounted range hood contributes approximately 2.89 dB(A)to the overall noise reduction.
作者
蒋济武
何新奎
王佳新
罗力
贾志强
JIANG Jiwu;HE Xinkui;WANG Jiaxin;LUO Li;JIA Zhiqiang(Guangdong Midea Refrigeration Equipment Co.,Ltd.,Foshan 528300)
出处
《家电科技》
2024年第4期73-77,共5页
Journal of Appliance Science & Technology
关键词
轴流风扇
CFD
导流环
降噪
Axial flow fan
CFD
Guide ring
Noise reduction
