总压畸变对小型风扇气动影响的数值模拟  

Numerical Simulation of the Impact of Total-pressure Distortion on the Aerodynamic Performance of Small-sized Fans

作　　者：孙鹏[1] 冯国泰[1] 隗东伟[2] 

机构地区：[1]哈尔滨工业大学能源与动力工程学院,黑龙江哈尔滨150001 [2]哈尔滨职业技术学院,黑龙江哈尔滨150040

出　　处：《热能动力工程》2006年第3期259-263,共5页Journal of Engineering for Thermal Energy and Power

基　　金：国家自然科学基金资助项目(50236020)

摘　　要：利用全三维非定常数值模拟的方法,求解某小型风扇在进口单畸变区方波型总压畸变情况下的流场参数。详细分析了总压畸变对风扇流场参数的影响,并从幅频分析的角度讨论了总压畸变经风扇衰减,以及动静叶间干扰的现象。计算和分析结果表明,该方法可以清晰描述流场参数沿周向分布情况;进口周向总压畸变会引起进口参数的重新分布,造成高低压区边界上有明显的周向测流,并且其在经过风扇衰减的同时会引起总温畸变。另外,进口畸变度相同时,随着畸变角度增加,畸变扰动和叶列间干扰明显增强。A full three-dimensional non-steady numerical simulation method was employed to solve the parameters of the flow field of a small-sized fan under the condition of a square-wave type total-pressure distortion at the inlet single-distortion zone.The effect of the total-pressure distortion on the parameters of the flow field of the fan has been analyzed in detail.Moreover,from the standpoint of amplitude and frequency analysis discussed are the phenomena of attenuation of total-pressure distortion via the fan and the interference between stator blades and moving ones.The calculation and analysis results indicate that the method under discussion can clearly depict the distribution of flow field parameters along the circumferential direction.The total-pressure distortion at the inlet along the circumferential direction may cause a redistribution of the inlet parameters,resulting in a marked circumferential lateral-flow at the boundary of high and low pressure areas and triggering a total-temperature distortion,which took place simultaneously with an attenuation via the fan.In addition,when the distortion degree at the inlet is identical,with an increasing distortion angle,the distortion disturbance and the interference between stator blades and moving ones will undergo a marked intensification.

关 键 词：非定常数值模拟 风扇 总压畸变 

分 类 号：TK474.8[动力工程及工程热物理—动力机械及工程]