Effect of gas compressibility on fluid field of air-cooled turbo-generator

被引：2
|
作者：
Liu, Ling [1 ]
Ding, Shuye [1 ]
Li, Zhenjiang [1 ]
Shen, Shufeng [1 ]
Chen, Shaoxian [1 ]
Dou, Yiping [1 ]
机构：
[1] Nanjing Normal Univ, Sch Elect & Automat Engn, 1 Wenyuan Rd, Nanjing, Peoples R China
来源：
IET ELECTRIC POWER APPLICATIONS | 2022年 / 16卷 / 06期
基金：
中国国家自然科学基金;
关键词：
compressible gas; finite volume method; fluid field; numerical calculation; turbo-generator; END REGION; ELECTROMAGNETIC-FIELD; TEMPERATURE DISTRIBUTION; LOSSES;
D O I：
10.1049/elp2.12187
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
The effect of gas compressibility on the fluid flow characteristics of a 350 MW air-cooled turbo-generator is investigated in this paper. Two gas models taking gas compressibility and incompressibility into account are established for numerical calculation. Then, a one-fourth physical model based on the practical ventilation structure and basic assumption is built to analyse the flow velocity and flow rate using the finite volume method (FVM). The FVM-predicted flow rate and flow velocity of cooling medium in the air cavity, stator and rotor of the generator show the distribution characteristics of flow rate and velocity in the generator is affected by the gas compressibility model selection. The comparison of FVM-predicted flow rate and experimental value shows that the FVM-predicted results using the gas compressibility model is more accurate when comparing to those using the incompressible model. Therefore, the gas compressibility model is an appealing approach to analyse the flow fluid characteristics of the air-cooled turbo-generator.
引用
收藏
页码：701 / 709
页数：9
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