Quantitative Evaluation of Wetness Losses in Steam Turbine

doi:10.7652/xjtuxb201401005

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Quantitative Evaluation of Wetness Losses in Steam Turbine

更新时间：2025-07-09

- Quantitative Evaluation of Wetness Losses in Steam Turbine
- Vol. 48, Issue 1, Pages: 25-30(2014)
- 作者机构：
  
  西安交通大学叶轮机械研究所,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201401005
  CLC： TK262
- Online First：10 January 2014，
  
  Published：2014
- 稿件说明：
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Quantitative Evaluation of Wetness Losses in Steam Turbine[J]. 2014, 48(1): 25-30.
DOI：

Quantitative Evaluation of Wetness Losses in Steam Turbine[J]. 2014, 48(1): 25-30. DOI： 10.7652/xjtuxb201401005.

摘要

为了提高湿汽损失的计算精度

在湿蒸汽非平衡凝结流动计算结果的基础上

采用Fortran语言发展了湿汽损失的定量计算程序

即利用多级透平内湿蒸汽非平衡凝结流动的三维计算方法获得各透平级的气动参数和一次水滴的三维分布

再对三维计算结果进行周向平均

从而获得了圆柱坐标系下子午面内的流场参数

并以此为基础进行湿汽损失的定量计算。对某核电汽轮机低压缸中的湿汽损失进行了分析

结果表明:湿汽损失中热力学损失主要产生于发生非平衡凝结的中间级和末级; 水滴阻力损失在末级中较大

其余各级中较小; 制动损失沿着流动方向逐级增加

是湿汽损失最主要的组成部分; 疏水损失及离心损失在湿汽损失中所占比例较小; 总的湿汽损失占该核电汽轮机低压缸总功率的3.1%。与Baumann公式3.9%的计算结果相比

该定量计算得到的湿汽损失更小

定量计算方法可为核电汽轮机的设计和优化提供参考。

Abstract

In order to improve the evaluation accuracy of wetness losses

a quantitative evaluation program of wetness losses was developed using the Fortran language from the calculation results of wet steam flow with non-equilibrium condensation. A three-dimensional(3D)simulation of the wet steam flow with non-equilibrium condensation in a multi-stage turbine was performed to obtain the aerodynamic parameters and 3D distribution of the fine droplets. Then the 3D results were circumferentially averaged to obtain the flow field in the meridian plane

and the parameters of the flow field were used to quantitatively evaluate the wetness losses. The wetness losses in the low pressure(LP)cylinder of a nuclear steam turbine were calculated. The results show that the thermodynamic loss is mainly generated in the intermediate and last stages where the non-equilibrium condensation occurs. The droplet drag loss has a greater proportion in the last stage

and lower proportion in other stages. The brake loss is the most important component of the wetness losses

and it increases stage by stage. The collected water loss and the centrifugal loss have small proportions in the total losses. The total wetness losses in the LP cylinder under consideration account for 3.1% of the total output power of the LP cylinder

less than 3.9% predicted by the Baumann rule.

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Keywords

references

MOORE M J, SIEVERDING C H. Two-phase steam

flow in turbines and separators[M]. Washington DC, USA: Hemisphere Publishing Corporation, 1976.

BAUMANN K. Recent developments in steam turbine practice[J]. Journal of the Institution of Electrical Engineers, 1912, 48(213): 768-842.

HESKETH J A, WALKER P J. Effects of wetness in steam turbines[J]. Proceeding of the Institution of Mechanical Engineers: Part C Journal of Mechanical Engineering Science, 2005, 219(12): 1301-1314.

KREITMEIER F, GREIM R, CONGIU F, et al. Experimental and numerical analyses of relaxation processes in LP steam turbines[J]. Proceeding of the Institution of Mechanical Engineers: Part C Journal of Mechanical Engineering Science, 2005, 219(12): 1411-1436.

LAALI A R. A new approach for assessment of the wetness losses in steam turbines[D]. Chatou, France: Electricité de France, 1991.

GUO T, SUMNER W J, HOFER D C. Development of highly efficient nuclear HP steam turbines using physics based moisture loss models[C]∥Proceeding of ASME Turbo Expo 2007. New York, USA: ASME, 2007: 825-833.

KAWAGISHI H, ONODA A, SHIBUKAWA N, et al. Development of moisture loss models in steam turbines[J/OL]. Heat Transfer — Asian Research, 2011[2012-12-15]. http: ∥onlinelibrary.wiley.com/doi/10.1002/htj.20395/.

LI Liang, LI Yu, WU Lianwei, et al. Numerical study on condensing flow in low pressure cylinder of a 300 MW steam turbine[C]∥Proceeding of ASME Turbo Expo 2010. New York, USA: ASME, 2010: 2289-2296.

STARZMANN J, CASEY M, SIEVERDING F. Non-equilibrium condensation effects on the flow field and the performance of a low pressure steam turbine[C]∥Proceeding of ASME Turbo Expo 2010. New York, USA: ASME, 2010: 2199-2208.

LI Liang, FENG zhenping, LI Guojun. Numerical simulation of wet steam condensing flow with an Eulerian/Eulerian model[J]. Chinese Journal of Mechanical Engineering, 2003, 16(2): 156-159。

李亮, 丰镇平, 李国君. 透平级内动静干涉对凝结特性影响的数值研究[J]. 工程热物理学报, 2007, 28(S1): 89-92.

LI Liang, FENG Zhenping, LI Guojun. Numerical study on the influence of stator-rotor interaction on condensing flow[J]. Journal of Engineering Thermophysics, 2007, 28(S1): 89-92.

LI Liang, FENG zhenping, LI Guojun. Study on effects of spontaneous condensing on performance of low pressure stages in a steam turbine[C]∥Proceeding of ASME Turbo Expo 2006. New York, USA: ASME, 2006: 1545-1553.

MORSI S A, ALEXANDER A J. An investigation of particle trajectories in two-phase flow systems[J]. Journal of Fluid Mech, 1972, 55(2): 193-208.

王建录,成冰,赵万华,等.汽轮机长叶片型面双刀加工刀位轨迹优化算法.2013,47(9):65-71.[doi:10.7652/xjtuxb 201309011]

霍文浩,晏鑫,李军,等.超超临界汽轮机高压缸旁路冷却系统冷却特性研究.2013,47(5):24-30.[doi:10.7652/xjtuxb 201305005]

霍文浩,晏鑫,李军,等.超超临界汽轮机高压缸旁路冷却系统流动特性的研究.2013,47(3):42-47.[doi:10.7652/xjtuxb201303008]

邵帅,邓清华,时和双,等.不同容积流量下汽轮机低压缸末三级定常流动数值研究.2013,47(1):15-20.[doi:10.7652/xjtuxb201301004]

潘家成,徐亮,高建民,等.轴向间距对二次水滴运动特性及沉积规律的影响.2012,46(7):1-6.[doi:10.7652/xjtuxb 201207001]

蔡柳溪,王顺森,毛靖儒,等.静叶斜置对高参数汽轮机再热后第一级叶栅冲蚀的影响.2012,46(7):12-15.[doi:10.7652/xjtuxb201207003]

李瑜,李亮,钟刚云,等.末级透平对低压缸气动和凝结特性的影响.2012,46(7):16-20.[doi:10.7652/xjtuxb201207 004]

屈焕成,张荻,谢永慧,等.汽轮机调节级非定常流动的数值模拟及汽流激振力研究.2011,45(11):39-44.[doi:10.7652/xjtuxb 201111008]

霍文浩,祁明旭,李军,等.超临界汽轮机中压透平级流动传热特性研究.2011,45(7):9-14.[doi:10.7652/xjtuxb2011 07003]

文乐,高林,戴义平.透平压缩机组的模糊PID控制与特性研究.2011,45(7):76-81.[doi:10.7652/xjtuxb201107015]

何纬峰,戴义平.环境风速对空冷凝汽器运行性能的影响.2011,45(5):31-35.[doi:10.7652/xjtuxb201105006]

刘钊,丰镇平,宋立明.实际叶片前缘冲击冷却流动和换热的数值研究.2011,45(1):5-9.[doi:10.7652/xjtuxb201101 002]

何纬峰,戴义平,马庆中,等.环境风影响下直接空冷单元背压预测研究.2011,45(1):15-20.[doi:10.7652/xjtuxb 201101004]

钟杰,郭成,岳朋,等.43″汽轮机叶片材料热变形行为及制坯工艺参数优化.2011,45(1):94-98.[doi:10.7652/xjtuxb 201101019]

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