Numerical Analysis on the Flow Instability of a 600 MW Supercritical W Flame Boiler

doi:10.7652/xjtuxb201505011

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Numerical Analysis on the Flow Instability of a 600 MW Supercritical W Flame Boiler

更新时间：2025-07-09

- Numerical Analysis on the Flow Instability of a 600 MW Supercritical W Flame Boiler
- Vol. 49, Issue 5, Pages: 68-72(2015)
- 作者机构：
  
  西安交通大学动力工程多相流国家重点实验室,西安,710049
- 作者简介：
- 基金信息：
- DOI：10.7652/xjtuxb201505011
  CLC： TK122
- Online First：10 May 2015，
  
  Published：2015
- 稿件说明：
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Numerical Analysis on the Flow Instability of a 600 MW Supercritical W Flame Boiler[J]. 2015, 49(5): 68-72.
DOI：

Numerical Analysis on the Flow Instability of a 600 MW Supercritical W Flame Boiler[J]. 2015, 49(5): 68-72. DOI： 10.7652/xjtuxb201505011.

摘要

建立了适用于超临界锅炉流动不稳定性分析的通用数值计算模型

编写了以Fortran语言为基础的流动不稳定性数值计算程序

对程序进行验证后

采用时域法对600 MW超临界W火焰锅炉的流动不稳定性进行了模拟。计算得到了W火焰锅炉的水动力特性曲线

并研究了系统参数对其动态流动不稳定性的影响。结果表明:该模型对模拟超临界水流动不稳定性具有一定的可靠性; 在0.09～0.3 kg/s的流量参数范围内

压降-流量特性曲线始终为单值关系

静态流动不稳定性不会发生; 当进口压力由25 MPa增大到27 MPa或进口流量由0.091 kg/s增加到0.1 kg/s时

流量脉动的振幅逐渐减小

表明增加进口压力或进口流量锅炉的稳定性提高; 当进口阻力系数由10减小到0.5或出口阻力系数由1增大到5时

流量脉动的振幅逐渐增大

表明减小进口阻力系数或增大出口阻力系数锅炉的稳定性降低。

Abstract

A general numerical computational model suitable for the analysis of supercritical boiler instability was established

and the numerical computational program based on Fortran was developed. Then the flow instability of a 600 MW supercritical W flame boiler was simulated by the time-domain method after the model and code were verified. The curve of pressure drop versus flow rate was obtained and the parametric effects on the dynamic instability of the W flame boiler were analyzed. The results showed that the model is reliable to simulate the supercritical water instability; the curve of pressure drop versus flow rate is always an one-on-one relationship at the flow rate range from 0.09 to 0.3 kg/s

which means the static flow instability does occur; when the inlet pressure increases from 25 to 27 MPa or the inlet flow rate increases from 0.091 to 0.1 kg/s

the amplitude of flow rate oscillation decreases

indicating that increasing inlet pressure or inlet flow rate will improve the boiler's stability; when the inlet pressure drop coefficient decreases from 10 to 0.5 or the outlet pressure drop coefficient increases from 1 to 5

the amplitude of flow rate oscillation increases

indicating that decreasing the inlet pressure drop coefficient or increasing the outlet pressure drop coefficient will reduce the boiler's stability.

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references

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