提示
凹槽对多翼离心风机气动性能和噪声的影响
首发时间：2024-07-18
摘要：为降低多翼离心风机噪声，改善其气动性能，采用数值模拟方法研究了蜗舌处不同凹槽分布对多翼离心风机气动性能和噪声的影响。结果表明：凹槽减弱了叶轮出口射流-尾迹与蜗舌壁面干涉作用，叶轮与蜗舌之间的通道内部高涡量减小，流动稳定性增强。蜗壳壁面附面层厚度减小，回流及旋涡情况改善，反向压差引起的流动阻力减小，流动损失减小，出口气流动能提升，风量增大。l50g11型多翼离心风机风量增幅为3.17%，全压效率降幅为4.81%，气动性能变化不大；监测点的平均噪声降低，最大平均噪声降幅为4.7 db，降噪效果最突出；l75g22型多翼离心风机监测点平均噪声值最大降幅为3.51 db，噪声情况改善；风量增幅为4.30%，全压效率增幅为3.34%，气动性能优势明显。
for information in english, please click here
influence of groove on aerodynamic performances and noise of multi-blade centrifugal fan
abstract： in order to reduce the noise of a multi-blade centrifugal fan and improve its aerodynamic performances, the effects of groove distribution on the aerodynamic performance and noise of a multi-blade centrifugal fan were studied by numerical simulation. the results show that the grooves weaken the interference between the impeller outlet jet wake and the tongue wall, the high vorticity in the channel between the impeller and the tongue decreases, while the flow stability increases. the thickness of the volute wall boundary layer decreases, reflux and vortex conditions improve, the flow resistance caused by reverse pressure difference and the flow loss decrease, the outlet flow kinetic energy and the air volume increases. the air volume of l50g11 multi-wing centrifugal fan increases by 3.17%, the total pressure efficiency decreases by 4.81%, and the aerodynamic performance changes little. the average noise of the monitoring points is reduced, the maximum average noise reduction is 4.7 db, and the noise reduction effect is the most prominent. the average noise value of the monitoring point of l75g22 multi-wing centrifugal fan decreases to 3.51 db, and the noise condition is improved. the increase of air volume is 4.30%, the increase of total pressure efficiency is 3.34%, indicating a superior aerodynamic performance.
keywords： multi-blade centrifugal fan tongue groove aerodynamic performance noise
论文图表：
引用
导出参考文献
no.****
同行评议
勘误表
凹槽对多翼离心风机气动性能和噪声的影响
评论
全部评论