Numerical Simulation of Unsteady Flow Phenomena and Excitation Force in Control Stage of Steam Turbine

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Numerical Simulation of Unsteady Flow Phenomena and Excitation Force in Control Stage of Steam Turbine

更新时间：2025-07-09

- Numerical Simulation of Unsteady Flow Phenomena and Excitation Force in Control Stage of Steam Turbine
- Vol. 45, Issue 11, Pages: 39-44+57(2011)
- 作者机构：
  
  西安交通大学能源与动力工程学院,西安,710049
- 作者简介：
- 基金信息：
- DOI：
  CLC： O21.8;TG558
- Online First：10 November 2011，
  
  Published：2011
- 稿件说明：
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Numerical Simulation of Unsteady Flow Phenomena and Excitation Force in Control Stage of Steam Turbine[J]. 2011, 45(11): 39-44+57.
DOI：

Numerical Simulation of Unsteady Flow Phenomena and Excitation Force in Control Stage of Steam Turbine[J]. 2011, 45(11): 39-44+57. DOI：

摘要

针对汽轮机调节级的非定常效应产生汽流激振力的问题

基于ANSYS CFX软件

采用RNG k-ε湍流模型、双时间步法、滑移界面模型和结构化六面体网格对带有进汽室和加强筋的汽轮机调节级进行了全周三维非定常黏性流场的数值模拟.研究发现:调节级非定常时均轮周效率低于定常轮周效率; 动叶在进出堵塞区域时存在较大的轴向汽流力和切向汽流力; 低频汽流激振力的基频为50 Hz; 汽流压力和静熵在不同截面的周向分布差异较大

在向下游运动过程中逐渐趋于平均; 堵塞区域的动叶通道掺混损失及鼓风损失较大

其将影响动叶的做功能力

进入堵塞区域时动叶吸力面首先受到影响.

Abstract

The prominently unsteady effect of the control stage in a steam turbine will result in strong flow excitation force. On the basis of the software ANSYS CFX

a 3-D unsteady viscous model for the control stage of a steam turbine with a partial admission room and a reinforced rib was constructed with the RNG k-ε turbulence model

the dual time step method

the sliding interface model and the structural hexahedron mesh. The simulation results show that the time-averaged unsteady wheel efficiency is lower than steady wheel efficiency. There are greater unsteady axial and circumferential forces in the inlet and outlet blocked areas of the rotor blades. Spectrum analysis indicates that the typical low frequency of the exciting force is 50 Hz. The circumferential distributions of pressure and static entropy are nonuniform and the nonuniformity decreases gradually towards the downstream sections. The mixing and windage losses are larger in the blocked channel

leading to the decrease in the blade work. In addition

the suction pressure of the rotor blade is affected significantly earlier than that of pressure side when the flow passes the blocked channel.

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Keywords

references

BOHN D E, FUNKE H H. Experimental investigations into the nonuniform flow in a 4-stage turbine with special focus on the flow equalization in the first turbine stage [C]∥Proceedings of ASME Turbo Expo. New York, USA: ASME, 2003:38547.

HE L. Computation of unsteady flow through steam turbine blade rows at partial admission [J]. Journal of Power and Energy, 1997, 211(3): 197-205.

LAMPART P, SZYMANIAK M, RZADKOWSKI R. Unsteady load of partial admission control stage rotor of a large power steam turbine [C]∥Proceedings of ASME Turbo Expo. New York, USA: ASME, 2004:53886.

SAKAI N, HARADA T, IMAI Y. Numerical study of partial admission stages in steam turbine: efficiency improvement by optimizing admission arc position [J]. JSME International Journal, 2006, 49(2): 212-217.

DORNEY D J, GRIFFIN L W, SONDARK D L. Full and partial admission performance of the simplex turbine [C]∥38th AIAA/ASME/SAE/ASEE Joint Propulsion Conference Exhibit. Reston, USA: AIAA, 2002: 3638.

FRIDH J E, BUNKUTE B, FAKHRAI R, et al. An experimental study on partial admission in a two-stage axial air test turbine with numerical comparisons [C]∥Proceedings of ASME Turbo Expo. New York, USA: ASME, 2004: 53774.

HUSHMANDI N B, HU J, FRIDH J, et al. Numerical study of unsteady flow phenomena in a partial admission axial steam turbine, GT2008-50538 [R]. New York, USA: ASME, 2008.

蔡颐年.蒸汽轮机[M].西安:西安交通大学出版社,1988: 111-113.

徐星仲,徐力平,蔡虎,等.处于部分进汽时动叶片排内非定常流动现象的数值研究[J].工程热物理学报,2001, 22(1): 36-39.

XU Xingzhong, XU Liping, CAI Hu, et al. Numerical investigation into cascade flow under partial admission [J]. Journal of Engineering Thermophysics, 2001, 22(1): 36-39.

訾宏达,方韧,徐星仲,等.汽轮机部分进汽调节级三维流场的非定常数值模拟[J].动力工程, 2007, 27(5): 721-724, 761.

ZI Hongda, FANG Ren, XU Xingzhong, et al. Numerical simulation of 3D unsteady flow in governing stages of steam turbines under partial admission condition [J]. Journal of Power Engineering, 2007, 27(5): 721-724, 761.

晏鑫,李军,丰镇平,等.大功率汽轮机调节级全三维气动性能的数值研究[C]∥中国工程热物理第十二届学术年会热机气动热力学分会. 重庆:中国工程热物理学会, 2006: 062034.

刘子亘,曹世裕,韩万金.调节级局部进汽对下游动叶气动负荷影响的数值研究[J].汽轮机技术, 2010, 52(1): 41-44.

LIU Zigen, CAO Shiyu, HAN Wanjin. Numerical simulation of effect of adjust stage local intake on aerodynamic load of downstream rotor blade [J]. Turbine Technology, 2010, 52(1): 41-44.

International Association for the Properties of Water and Steam. Release on the IAPWS industrial formulation 1997 for the thermodynamic properties of water and steam [EB/OL]. [2007-08-26]. http:∥www. iapws. org/relguide/IF97-Rev.pdf.

BARTH T J, JESPERSON D C. The design and application of upwind schemes on unstructured meshes, AIAA-89-0366 [R]. Reston, USA: AIAA, 1989.

JAMSON A. Time dependent calculation using multigrid with applications to unsteady flows past airfoils and wings [C]∥AIAA 10th Computational Fluid Dynamics Conference. Reston, USA: AIAA, 1991: 1596.

YAKHOT V, ORZAG S A.Renormalization group analysis of turbulence: basic theory [J].Journal of Scientific Computing,1986,1(1):3-11.

谢永慧,蓝吉兵,樊涛.透平级三维粘性非定常流动及气流激振力研究 [J].中国电机工程学报, 2008, 28(5):78-84.

XIE Yonghui, LAN Jibing, FAN Tao. Investigation of three dimensional viscous unsteady flow and excitation force of turbomachinery stage [J]. Proceedings of the CSEE, 2008, 28(5): 78-84.

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