摘要
局部通风机在工作时,由于叶片的高速旋转产生强烈的气动噪声,为了研究仿生叶片对通风机气动性能和气动噪声的影响规律,借鉴鸮翼后缘锯齿形态和前缘非光滑形态的降噪性能,针对一台矿用对旋式局部通风机的前级叶轮进行叶片仿生结构设计,分别设计了锯齿状后缘、圆齿状前缘和锯齿状后缘加圆齿状前缘3种叶片仿生结构。在保证不显著降低对旋式局部通风机气动性能的情况下,应用大涡模拟方法和FW-H方程,对比分析了风机在相同流量下分别采用原始叶片和3种仿生叶片的气动噪声性能。结果表明:3种仿生叶片与原始叶片相比均具有一定程度的降噪效果,而锯齿状后缘加圆齿状前缘的仿生叶片结构比单纯采用锯齿状后缘或圆齿状前缘的仿生叶片结构具有更显著的降噪效果。
When the local fan is working, there is a strong aerodynamic noise due to the high speed rotation of the blade. In order to study the influence of bionic blade on the aerodynamic performance and noise of fan, by reference to the noise reduction performance of the trailing edge saw-tooth shape and the leading edge non-smooth shape of owl wing, the bionic structure design of the blade was conducted for a mine-used rotary local fan. A comparative study was made on the bionic structure of three kinds of blade with saw tooth-shaped trailing edge, crenate leading edge and serrated trailing edge plus crenate leading edge. On the basis of ensuring the aerodynamic performance of the local fan, a large eddy simulation method and an FW-H equation were used to compare the aerodynamic noise performance among the original blade and the three bionic blades of local fan under the same flow rates. The results show that the three bionic blade structures had a certain degree of noise reduction compared with the original blade structure, and the bionic blade structure with both serrated trailing edge and crenate leading edge reduced the noise better than the other two bionic blades with serrated trailing edge or crenate leading edge only.
作者
陈庆光
李晓凯
CHEN Qingguang;LI Xiaokai(College of Mechanical and Electronic Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《太原理工大学学报》
CAS
北大核心
2020年第2期226-233,共8页
Journal of Taiyuan University of Technology
基金
山东省自然科学基金资助项目(ZR2018MEE036)
关键词
对旋式局部通风机
仿生叶片
大涡模拟
气动噪声
contra-rotating local fan
bionic blade
large-eddy simulation
aerodynamic noise
