除尘风机磨损的数值分析：叶型和粒度分布的影响

本资料包含pdf文件1个，下载需要1积分

采用CFD技术,基于RNGk-ε紊流模型和磨损模型,研究了不同叶型除尘风机的流场和磨损率,证实了后倾型叶片比直叶片能优化流场,改善磨损,使风机使用寿命延长5倍。计算了一定粒度分布的粒子对后倾叶片中的磨损率。结果表明,颗粒粒径和数量浓度的大小是决定磨损程度的重要因素。因此去除大粒径粉尘、降低小粒径粉尘的数量浓度,是减轻叶片磨损的重要途径之一,更是除尘设备的工作方向。 By means of computational fluid dynamics and based on Renormalization Group（RNG） k-e turbulence model and erosion model,air flow fields and erosion rates of the dust-cleaning fan have been investigated at different blades patterns.The numerical simulation proves that backward curve blades can optimize air flow and reduce erosion rather than straight blades,making the service life of fan prolong 5 times.The erosion rates of backward curve blades are calculated at a certain particle granularity distribution.The results show that particle sizes and amount concentration are important factors deciding erosion rates.Therefore,collecting coarse particles and reducing granularity distribution of fine dusts is one of the main ways ameliorating erosion.