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요약정보
熔盐泵空间导叶几何参数的优化分析 / Optimization analysis of the geometric parameters of spatial guide vane in molten salt pump
Resource Type
Academic Journal
Authors
夏添
;
操松林
;
刘广兵
;
赵以奎
;
文宏刚
;
刘海山
;
董文平
;
XIA Tian
;
CAO Songling
;
LIU Guangbin
;
ZHAO Yikui
;
WENG Hongang
;
LIU Haishan
;
DONG Wenping
Source
流体机械 / Fluid Machinery
. 51(5):41-48
Subject
熔盐泵
空间导叶
导叶几何参数
优化算法
Language
Chinese
ISSN
1005-0329
Online Access
Find it @ DONGA
초록
为了提高某高温太阳能熔盐泵水力性能,对泵首级空间导叶进行了研究,以设计工况下的泵首级扬程和水力效率作为优化目标,通过CFD数值模拟对泵首级扬程和效率进行计算,并通过试验验证了数值算法的可靠性.利用Plackett-Burman试验方法进行优化变量筛选,得到了对泵性能影响较大的4个几何参数:导叶外流线直径D4、导叶叶片包角?、导叶出口角α4 以及导叶进口角α3.采用最优拉丁超立方抽样方法构建RBF神经网络训练所需的初始样本数据库,从而建立优化目标与优化变量之间的近似模型.通过R2 误差分析方法对近似模型进行可靠性分析,可知RBF神经网络构建的近似模型精确度较高.基于NSGA-Ⅱ遗传优化算法进行极值寻优,获得所研究的空间导叶四个几何参数的最佳取值.对比导叶优化前后内流场分布,可以发现:优化后的导叶较原导叶进口位置处局部低压区变小,压力梯度变化更为均匀有序,动静压能转换效率得以提高;优化导叶内部旋涡区域及强度均有不同程度的减小,流动分离损失降低,内部流动稳定性提高.优化后泵首级过流段扬程提高了2.86%,水力效率提高了4.38%,优化效果明显.
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