Developing Models of Turbine Thermal Processes in Low-Steam and Motor Modes

G. A. Pikina; E. K. Arakelyan; F. F. PashchenkoG. A. Filippov

首页> 外文期刊>Thermal engineering >Developing Models of Turbine Thermal Processes in Low-Steam and Motor Modes

【24h】

Developing Models of Turbine Thermal Processes in Low-Steam and Motor Modes

机译：Developing Models of Turbine Thermal Processes in Low-Steam and Motor Modes

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

The main purpose of the motor mode is to keep the turbine in hot standby (with the boiler off) without generating electricity to the grid. To do this, the generator is switched to the engine mode, which rotates the turbine rotor, and the cooling of the flow path is performed by supplying one or two intermediate steam extractions from the extractions of the neighboring turbine. The first stages of the high-pressure cylinder run on steam from the front seals. The noted specificity of the purpose and operating conditions of the turbine in low-steam modes imposes additional requirements on the mathematical model. When developing models of a turbine stage in a motor mode, the physical media included in the object were taken into account: the steam of the flow path passing through the nozzle and working discs, participating in the conversion of its thermodynamic and kinetic energy into mechanical energy of the rotor rotation; vapor leakage into the space between the discs; steam leakage through the rotor-guide vane seal; metal of rotating devices (working disks and turbine rotor); and metal of the stator and exhaust pipes. Multipoint models are obtained with lumped parameters distributed along the length of the flow channel with values that vary depending on the ordinal number of the stage. The main part of the step models are eight ordinary differential equations or partial differential equations of physical media. The developed models are necessary for computer modeling and investigating the temperature distribution of the turbine flow path. Based on the research results, it is proposed to create a real automatic control system that ensures the implementation of restrictions on metal heating and the generation of added power.

著录项

来源
《Thermal engineering》 |2021年第8期|612-618|共7页
作者
G. A. Pikina; E. K. Arakelyan; F. F. PashchenkoG. A. Filippov;
展开▼
作者单位

National Research University Moscow Power Engineering Institute||Trapeznikov Institute for Management Problems, Russian Academy of Sciences;

National Research University Moscow Power Engineering Institute;

Trapeznikov Institute for Management Problems, Russian Academy of Sciences;

展开▼
收录信息
原文格式 PDF
正文语种英语
中图分类
关键词
turbine; low steam and motor modes; thermal processes; multipoint models; distributed parameter model; partial differential equations; lumped parameter model; ordinary differential equations;

Developing Models of Turbine Thermal Processes in Low-Steam and Motor Modes

摘要

著录项

相关主题

期刊订阅