排灌机械工程学报2025，Vol.43Issue(8)：795-802,8.DOI:10.3969/j.issn.1674-8530.23.0283
多翼离心浴室暖风机气动声学特性分析和优化
Analysis and optimization on aerodynamic acoustic characteristics of multi-blade centrifugal fan for bathroom heaters
摘要
Abstract
A numeriacal simulation method combining computational fluid dynamics(CFD)and the Ffowcs Williams-Hawkings(FW-H)equation was established to predict the noise mechanism of a multi-blade centrifugal fan in a bathroom heater.The aerodynamic performance,pressure pulsastion characteristics,and aerodynamic noise of the fan were analyzed.The structure of the fan heater was op-timized to improve the aerodynamic performance of the fan and reduce noise.In terms of the impeller,the impeller flow channel structure was optimized by improving the inlet angle,outlet angle and total number of impeller blades.In the static domain,the bending sections of the volute and the outlet sec-tion were eliminated,the internal baffle's length of the outer was increased,and the clearance of the volute was enlarged.The research results reveal that the optimized model exhibits better performance in terms of flow field characteristics and impeller work range,concurrently leading to a reduction in the noise pressure level across the entire frequency range.The experiments have confirmed that the average sound pressure level of far-field noise in the optimized model is 3.11 dB lower than that of the original model,which further affirming the reliability of the optimization scheme.关键词
多翼离心风机/降低噪声/气动性能/气动噪声/数值计算Key words
multi-blade centrifugal fan/sound pressure level reduction/aerodynamic performance/aerodynamic noise/numerical simulation分类
农业科技引用本文复制引用
袁建平,高荃林,王龙滟,王子路..多翼离心浴室暖风机气动声学特性分析和优化[J].排灌机械工程学报,2025,43(8):795-802,8.基金项目
国家自然科学基金资助项目(12002137) （12002137）
