叶轮
腐蚀
材料科学
粒子(生态学)
离心泵
铅(地质)
机械
入口
机械工程
物理
地质学
工程类
海洋学
地貌学
古生物学
作者
Zhanzhong Liu,Guojun Li
出处
期刊:International Journal of Modern Physics B
[World Scientific]
日期:2023-02-01
卷期号:37 (23)
标识
DOI:10.1142/s0217979223502259
摘要
In order to study the influence of solid particles in lead–bismuth alloy on the safety of nuclear main pump, DPM (Discrete Phase Model) is used to calculate the wear rate of the impeller of nuclear main pump under different operating conditions. By comparing the erosion rate and the most severe erosion area under different working conditions, the most unfavorable operating conditions are obtained. The results show that the erosion of impeller caused by solid particles is the most serious when the inlet velocity of particles u is 0.4[Formula: see text]m/s and particle size D is 100[Formula: see text][Formula: see text]m. Under the small particle size, the impeller erosion concentrated on the suction side of the blade, and under the large particle diameter, the erosion concentrated on the pressure side, and the erosion is more serious. With the increase of solid particle velocity, the erosion of the impeller increases first and then decreases. The erosion severity of impeller and front and rear cover plates caused by solid particles is not consistent. The above research can provide guidance for the anti-wear design and safe operation of the nuclear main pump impeller.
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