离心风机低稠度扩压器气动性能及噪声特性的试验研究  

Test and Research of Aerodynamic Performance and Noise Characteristics of Centrifugal Fan Diffuser with Low Consistency

作　　者：宫武旗[1] 刘禛[1] 

机构地区：[1]西安交通大学能源与动力工程学院,陕西西安710049

出　　处：《风机技术》2014年第1期20-23,42,共5页Chinese Journal of Turbomachinery

基　　金：陕西省自然科学基金(2013JM7006);国家自然科学基金(50676072)

摘　　要：对一高速离心风机低稠度扩压器的气动与噪声特性进行了试验研究。结果表明，在很宽的运行工况范围内，设计良好的低稠度扩压器静压恢复系数是无叶扩压器的5~7倍。设计低稠度扩压器时，应避免过大正冲角或负冲角，在0°~1.5°范围内比较合适，大的负冲角有利于降低风机的气动噪声。合适的叶栅稠度有利于提高扩压器性能，稠度为0.7时的气动性能最好，小的叶栅稠度有利于降低风机气动噪声。The aerodynamic performance and noise characteristics of a high-speed centrifugal fan diffuser with low consistency is tested and studied in this paper. The result shows that the static pressure recovery coefficient of low-consistency and well-designed diffuser is 5 to 7 times than of vaneless diffuser in the wide range of operating condition. When designing low-consistency diffuser, excessive positive or negative attack angle should be avoided and the range of 0° to 1.5° is more suitable. Large negative attack angle is helpful for reducing aerodynamic noise of fan. The suitable cascades consistency is helpful for improving diffuser performance.When the consistency is 0.7,aerodynamic performance is the best. Small cascades consistency is helpful for reducing aerodynamic noise of fan.

关 键 词：离心风机 低稠度扩压器 冲角 稠度 气动噪声 

分 类 号：TH432[机械工程—机械制造及自动化]