离心泵作透平启动过程的瞬态特性分析

摘要
图/表
参考文献(15)
相关文章 (15)

全文: PDF (2042 KB) HTML (1 KB)
输出: BibTeX | EndNote (RIS)

摘要为研究离心泵作透平(PAT)启动过程中的瞬态特性，根据转动方程编写UDF程序，基于Fluent滑移网格的转速控制方法对PAT启动过程进行模拟计算，并与试验结果进行对比验证。结果表明：启动初始时刻叶轮内形成了强烈的叶道涡，随着转速的增加，叶道涡的强度逐渐减小，压力呈梯度分布。启动初始时刻叶片载荷振荡分布，最大振幅出现在叶片中间位置，远高于稳态工况下的叶片载荷；径向力和轴向力都随着转速的增加急剧增大后振荡下降，当转速趋于稳定后，径向力和轴向力呈周期性振荡，轴向力脉动的幅值小于径向力的，每个振荡周期的脉动次数与叶片数一致。启动过程中转子做加速度逐渐减小的加速转动，來流压力越大，达到设计转速的时间越短，完成启动后的稳定转速越高；转动惯量越小，完成启动越快。

	服务

	把本文推荐给朋友
	加入我的书架
	加入引用管理器
	E-mail Alert
	RSS
	作者相关文章
	柴宝堆1
	2
	杨军虎1
	王晓晖1
	姜丙孝1

关键词 ：泵作透平, 启动过程, 转速, 瞬态特性

Abstract：In order to study the transient characteristics of centrifugal pump as turbine (PAT) in the process of startup, UDF programs were written according to the rotation equations. Rotational speed control method based on Fluent sliding mesh was used to carry out numerical simulation of PAT during startup process, which was compared with the experimental results. The results show that strong leaf vortices are formed within the impeller at the initial time of startup, besides, the intensity of blade vortex decreases gradually and the pressure assumes gradient distribution with the increase of rotational speed. Blade load shows oscillatory distribution at the initial time of startup, and its maximum amplitude appears in the middle of the blade position, which is much higher than blade load of steady state condition. Radial force and axial force both increase sharply with the increase of rotational speed but decrease oscillatorily soon afterwards. After the rotational speed intends to be stable, radial force and axial force assume periodic oscillation. Pulse amplitude of axial force is less than that of radial force, and each pulse frequency of the oscillation period is consistent with leaf number. The acceleration of rotor decreases gradually in the process of startup, moreover, the greater pressure of flow fluid is, the shorter time is to meet the design speed, and the higher the steady speed is after completion of startup. The smaller the moment of inertia is, the faster startup is completed.

Key words： pump as turbine startup process rotational speed transient characteristic

收稿日期: 2020-08-18 出版日期: 2021-12-15

引用本文:

柴宝堆1, 2，杨军虎1，王晓晖1，姜丙孝1. 离心泵作透平启动过程的瞬态特性分析[J]. 振动与冲击, 2021, 40(23): 38-43.
CHAI Baodui1,2, YANG Junhu1, WANG Xiaohui1, JIANG Bingxiao1. Transient characteristics of centrifugal pump as turbine in its start-up process. JOURNAL OF VIBRATION AND SHOCK, 2021, 40(23): 38-43.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2021/V40/I23/38

[1] 王晓晖,杨军虎,史凤霞.能量回收液力透平的研究现状及展望[J].排灌机械工程学报,2014,32(9): 742-747.
WANG Xiaohui, YANG Junhu, SHI Fengxia. Status and prospect of study on energy recovery hydraulic turbines[J]. Journal of Drainage and Irrigation Machinery Engineering. 2014, 32(9): 742-747.
[2] BINAMA M, Su W T, Li X B, et al. Investigation on pump as turbine(PAT)technical aspects for micro hydropower schemes: A state of the art review[J]. Renewable and Sustainable Energy Reviews, 2017(79): 148-179.
[3] Yang S S, Derakhshan S, Kong F Y. Theoretical, numerical and experimental prediction of pump as turbine performance [J].Renewable Energy, 2012, 48(6): 507-513.
[4] Huang S, Qiu G Q, Su X H, et al. Performance prediction of a centrifugal pump as turbine using rotor-volute matching principle[J]. Renewable Energy, 2017, 108: 64-71.
[5] VENTURINI M, MANSERVIGI L, ALVISI S， et al. Development of a physics-based model to predict the performance of pumps as turbines [J].Applied Energy, 2018, 231: 343-354.
[6] NOVARA D , MCNABOLA A. A model for the extrapolation of the characteristic curves of pumps as turbines from a datum best eﬃciency point[J]. Energy Conversion and Management, 2018, 174: 17.
[7] 代翠,孔繁余,董亮,等.叶片包角对液力透平水力径向力的影响[J].振动与冲击,2015,34(18):69-72.
DAI Cui, KONG Fanyu, DONG Liang, et al. Effect of blade wrap angle on the radial force of centrifugal pump as turbine [J].Journal of Vibration and Shock, 2015, 34(18): 69-72.
[8] Shi F X, Yang J H, Wang X H. Numerical prediction of radial force in hydraulic turbine based on fluent[J].Advanced Materials Research, 2013, 716: 717-720.
[9] 苗森春,杨军虎,王晓晖,等.基于神经网络-遗传算法的液力透平叶片型线优化[J].航空动力学报,2015, 30(8): 1918-1925.
MIAO Senchun, YANG Junhu, WANG Xiaohui, et al. Blade pattern optimization of the hydraulic turbine based on neural network and genetic algorithm[J]. Journal of Aerospace Power, 2015, 30(8): 1918-1925.
[10] Miao S C, Yang J H, Shi G T, et al. Blade profile optimization
of pump as turbine[J].Advances in Mechanical Engineering, 2015, 7(9): 1-9.
[11] 陈文鹏,刘胤超,陈立卫.基于UDF的水平轴潮流能水轮机被动旋转水动力性能研究[J].海洋工程,2018, 36(2):119-126.
CHEN Wenpeng, LIU Yingchao, CHEN Liwei. Study on hydrodynamic performance of horizontal tidal turbine rotating passively based on UDF[J]. The Ocean Engineering, 2018, 36(2): 119-126.
[12] 孙科,李岩,赵金辉.竖轴水轮机瞬态启动性能分析[J].华中科技大学学报(自然科学版),2017,45(4): 51-56.
Sun Ke, Li Yan, Zhao Jinhui. Transient starting performance analysis of vertical axis tidal turbine[J]. Journal of Huazhong University of Science and Technology(Natural Science Edition), 2017, 45(4): 51-56.
[13] BARRIO R ,FERNÁNDEZB J，BLANCO E， et al. Estimation of radial load in centrifugal pumps using computational fluid dynamics[J]. European Journal of Mechanics-B/Fluids, 2011, 3(30): 316-324.
[14] 宿向辉.离心泵作透平系统变转速及过渡过程研究[D].华南理工大学,2016.
Su Xianghui. Research on the variable rotation speed and transient process of centrifugal pump as turbine system[D]. South China University of Technology, 2016.
[15] Derakhshan S, Mohammadi B, Nourbakhsh A. Efficiency improvement of centrifugal reverse pumps[J]. Journal of Fluids Engineering, 2009, 131(2): 021103.