噪声与振动控制2019，Vol.39Issue(1)：216-220,5.DOI:10.3969/j.issn.1006-1355.2019.01.041
蜗舌型式对离心通风机气动激励的影响分析
Analysis of Influences of theWorm Tongue Structure Type on the Internal Aerodynamic Actuation of Centrifugal Ventilators
丁可金 1罗玉娟 1高延军1
作者信息
- 1. 上海船舶设备研究所, 上海 200031
- 折叠
摘要
Abstract
Worm tongue is an important component of the centrifugal ventilator. To investigate its influences on the vibration noise of the centrifugal ventilator, numerical simulation is conducted for the aerodynamic actuation of a certain centrifugal ventilator. Through steady computation, it is found that the structure improvement of the worm tongue can help to reduce local vortex and reduce the excitation factor. Through unsteady simulation, it is verified that the impact of the worm tongue structure on the aerodynamic actuation is mainly reflected by the amelioration of local pressure fluctuation and especially, by the decrease of the fluctuation of the blade frequency induced by the outflow from the impeller. Based on the numerical results for the model ventilator, the variation of the vibration noise is evaluated. The results show that improvement of the worm tongue structure is beneficial to the reduction of the vibration noise. Numerical analysis for aerodynamic actuation can provide judgments to evaluate the effectiveness of the low-noise improvement of ventilators.关键词
振动与波/离心通风机/蜗舌/压力脉动/数值模拟Key words
vibration and wave/centrifugal ventilator/worm tongue/pressure fluctuation/numerical simulation分类
交通工程引用本文复制引用
丁可金,罗玉娟,高延军..蜗舌型式对离心通风机气动激励的影响分析[J].噪声与振动控制,2019,39(1):216-220,5.
