程效锐,魏彦强,刘贺,吴超
CHENG Xiao-rui,Wei Yan-qiang,LIU He,WU Chao

• 1:兰州理工大学
• 2:甘肃省流体机械及系统重点实验室

摘要(Abstract)：

基于连续性方程、雷诺时均N-S方程和RNG k-ε湍流模型,对核主泵内部流场进行稳态数值计算,并进行试验验证。根据数值计算结果分析导叶、蜗壳内静压回收与总压损失、压力变化等特性。结果表明,数值计算性能预测结果与试验结果吻合;在小流量工况下导叶内总压损失明显大于蜗壳,两者变化趋势刚好相反,随着流量的增大导叶内的总压损失减小而压水室内的增大;在大流量工况下导叶内总压损失在总损失中占主要部分,随着流量的增大导叶和压水室内的总压损失变化一致,都增大;静压回收主要在导叶中进行,在蜗壳中静压回收小;导叶工作面与背面的压力随流量的增大均减小,在大流量工况时减小程度更大;叶轮流道内压力随流量的增大逐渐增大,并且在叶轮流道中后段压力分布不均匀,压力梯度大,最大压力位于压力面靠近叶片尾缘处;动静转子之间压力随流量的增大而增大,在大流量工况下压力梯度变化大。
Based on the continuity equation,Renaults N-S equation and RNG k-ε turbulence model,the steady-state numerical method was applied to simulate the flow field and pressure field in the nuclear main pump,and was verified by tests. The characteristics such as static pressure recovery,total energy loss and pressure fluctuation in the guide vanes and volute were analyzed according to the numerical calculation results.The results show that the performance predicted by the numerical method is in good agreement with test results;The total pressure loss in guide vanes was substantially bigger than that in the volute under small flow condition,but the their change trends were just other way around,and the total pressure loss in the guide vanes decreased and increased in discharge chamber with the increase of flow rate;the total pressure loss accounted for a main part in the total loss under large flow operating conditions,but the changes of total pressure loss in guide vanes and discharge chamber were consistent,both increased with the increase of flow rate;the static pressure recovery took place mainly in the guide vanes,and was very small in the discharge chamber;the pressures on the working face and back face of the guide vanes decreased with the increase of flow rate,and the decrease was more severe under the large flow condition; the pressure increase gradually with the increase of the flow in the flow passage of impeller,and the pressure distribution was uneven in the middle and rear part of the impeller passage with a big pressure gradient and the maximum pressure being located near the trailing edge of the vane on pressure side;The pressure increased in the space between the rotating and static rotors with the increase of flow rate,and the pressure gradient varied greatly under large flow condition.

关键词(KeyWords)： 核主泵;叶轮;导叶;能量转换;数值计算
nuclear main pump;impeller;guide vane;energy conversion;numerical calculation

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 程效锐,魏彦强,刘贺,吴超
CHENG Xiao-rui,Wei Yan-qiang,LIU He,WU Chao

参考文献(References)：

• [1]朱荣生,郑宝义,李小龙,等.1000MW级核主泵内部非定常流动特性[J].热能动力工程,2012,27(3):377-382.
• [2]赵星宇,刘莹,温庆丰,等.主泵备用机械密封材料的摩擦性能研究[J].流体机械,2012,40(5):8-12.
• [3]喻健良,张忠华,闫兴清,等.高温下螺栓-法兰-垫片系统密封性能研究[J].压力容器,2012,29(5):8-12.
• [4]Oro J M F.Decomposition of deterministic unsteadiness in a centrifugal turbomachine:nonlinear interactions between the impeller flow and volute for a double suction pump[J].Journal of Fluids Engineering,2011,133(133):011103.
• [5]张翔.不锈钢冲压焊接离心泵能量转换特性与设计方法[D].镇江:江苏大学,2011.
• [6]徐朝晖,吴玉林,陈乃祥,等.基于滑移网格与RNG湍流模型计算泵内的动静干扰[J].工程热物理学报,2005,26(1):66-68.
• [7]施卫东,张磊,陈斌,等.离心泵间隙对压力脉动及径向力的影响[J].排灌机械工程学报,2012,30(3):260-264.
• [8]朱相源,江伟,李国君,等.导叶式离心泵内部流动特性数值模拟[J].农业机械学报,2016,47(6):34-41.
• [9]朱跃,张继革,尹俊连,等.屏蔽式核主泵动静转子间的压力脉动特性[J].原子能科学技术,2014,48(9):1576-1582.
• [10]程效锐,叶小婷,包文瑞.核主泵环形压水室内的能量转换特性[J].西华大学学报:自然科学版,2017,36(1):69-75.
• [11]杨从新,贾程莉,程效锐,等.导叶周向布置位置对核主泵性能的影响[J].兰州理工大学学报,2015,41(5):54-58.