摘要
为了分析除氧器用喷雾碟片损坏的原因,采用基于流固耦合的数值模拟方法研究了碟片的受力特性。结果表明,喷雾碟片的较大应力出现在首端表面和距离齿片较近的齿槽处,最大变形出现在碟片尾端,应力和变形未超出材料许用范围。喷雾碟片的凹体结构除了能够提高湍流强度,还具备阻断局部应力扩散的作用。经分析计算得出,喷雾碟片的最大工作流量为喷嘴额定流量的120%。探索出针对闭合流场的CFD数值模拟方法和分析碟片受力特性的流固耦合方法,对于喷雾碟片的损坏原因分析和结构优化具有一定的参考价值和指导意义。
In order to analyze the causes of the damage of spray discs for the deaerator, a numerical simulation method based on fluid-structure interaction was used to study the mechanical characteristics. The results showed that the larger stress of appeared at the head end surface and the gear grooves close to the gear disc, and the maximum deformation occurred at the end. The stress and deformation were within the allowable range of the material. The concave structure not only increased the turbulence intensity but also blocked the local stress diffusion. After analysis and calculation, the maximum working flow of the spray disc was 120% of the rated flow of the nozzle. The CFD numerical simulation method for the closed flow field and the fluid-structure interaction method for analyzing the mechanical characteristics were explored. It has certain reference value and guiding significance for damage cause analysis and structural optimization of the spray disc.
作者
刘欣
朱纪庆
Liu Xin;Zhu Jiqing(Shanghai Electric Power Generation Equipment Co.,Ltd.Shanghii Power Station Auxiliary Equipment Plant,Shanghai 200090,China)
出处
《电站辅机》
2021年第4期40-45,50,共7页
Power Station Auxiliary Equipment
关键词
除氧器
喷雾碟片
CFD数值模拟
流固耦合
受力特性
deaerator
spray discs
CFD numerical simulation
fluid-structure interaction
mechanical characteristics
