摘要
为改良核主泵水力性能,提高核主泵安全可靠性,探究不同流量下核主泵压水室流线变化规律,分析压水室压力分布特点,关注类隔舌位置水力压力的时域、频域特性,对混流式核主泵进行全流道仿真计算。计算结果表明,类球形蜗壳压力分布呈明显的梯度变化,且在其壁面靠近类隔舌位置有最大压力出现。设计工况下,压水室压力脉动主要受叶频影响,随着流量的减小,转频诱发水力振动的成分增加,但是压水室主频与转频、叶频都存在一定的偏差。若流量过小,压水室内流体湍流度增加,压水室出口段流线也将呈现螺旋状。
In order to improve the hydraulic performance and reliability of reactor coolant pump,the whole flow passage is calculated.The change rules of streamline are explored and the pressure characteristics of pressurized water chamber are also analyzed.The time frequency characteristics of pressurized water chamber are introduced.The results show that the static pressure in volute appears gradient distribution obviously,and the maximum stress appears in the wall.Under the condition of designed flow rate,the fluctuation pressure in pressurized water chamber is mainly affected by blade passage frequency.With the decrease of flow,the influence of hydraulic vibration caused by rotational frequency is increased.Main frequency of pressurized water chamber exist a certain degree of deviation with blade passage frequency and rotational frequency.If the flow is too low,the streamline will wind into the spiral way in outlet.
出处
《水力发电》
北大核心
2016年第6期53-56,共4页
Water Power
基金
国家自然科学基金资助项目(51379179)
西华大学研究生创新基金资助项目(ycjj2015047)
关键词
核主泵
压水室
流线
压力
reactor coolant pump
pressurized water chamber
streamline
pressure
