| Investigation on reversible pump turbine flow structures and associated pressure field characteristics under different guide vane openings | |
| Alternative Title | Investigation on reversible pump turbine flow structures and associated pressure field characteristics under different guide vane openings |
| Maxime Binama1; Su Wentao2; Cai Weihua1; Li FengChen4; Wei XianZhu5; Alex Muhirwa1; Gong RuZhi1; David Wekesa W1 | |
| 2019 | |
| Source Publication | SCIENCE CHINA-TECHNOLOGICAL SCIENCES
 |
| ISSN | 1674-7321 |
| Volume | 62Issue:11Pages:2052-2074 |
| Abstract | The use of reversible pump turbines (RPT) within pumped storage power plants goes with prolonged periods of off-design operating conditions, which leads to the onset of operating mode-dependent instabilities. In order to decrease the gravity of RPT flow instabilities and associated damages or even completely eliminate them, a deep understanding of its onset and development mechanism is needed. In line with this, the present study seeks to numerically investigate the onset and development mechanism of RPT unsteady flow structures as well as the evolutional characteristics of associated pressure pulsations throughout the RPT complete flow passage, under off-design conditions for three GVOs namely 17, 21, and 25 mm. The study results showed that low torque operating conditions and associated vaneless space back flow structures were the trigger of flow unsteadiness onset within the RPT vaneless space, the instabilities which grew to cause the S-shape characteristics appearance. Moreover, the runner flow unsteadiness was found to decrease with the GVO increase. On the other hand, the GVO increase worsened the pressure pulsation levels within RPT flow zones, where pressure pulsations within the vaneless space and flow zones in its vicinities were found to be the most sensitive to GVO changes. |
| Other Abstract | The use of reversible pump turbines (RPT) within pumped storage power plants goes with prolonged periods of off-design operating conditions,which leads to the onset of operating mode-dependent instabilities.In order to decrease the gravity of RPT flow instabilities and associated damages or even completely eliminate them,a deep understanding of its onset and development mechanism is needed.In line with this,the present study seeks to numerically investigate the onset and development mechanism of RPT unsteady flow structures as well as the evolutional characteristics of associated pressure pulsations throughout the RPT complete flow passage,under off-design conditions for three GVOs namely 17,21,and 25 mm.The study results showed that low torque operating conditions and associated vaneless space back flow structures were the trigger of flow unsteadiness onset within the RPT vaneless space,the instabilities which grew to cause the S-shape characteristics appearance.Moreover,the runner flow unsteadiness was found to decrease with the GVO increase.On the other hand,the GVO increase worsened the pressure pulsation levels within RPT flow zones,where pressure pulsations within the vaneless space and flow zones in its vicinities were found to be the most sensitive to GVO changes. |
| Keyword | ENERGY-STORAGE TECHNOLOGIES VORTEX IDENTIFICATION TRANSIENT PERFORMANCE SIMULATION FLUCTUATION INSTABILITY PREDICTION DESIGN SPEED reversible pump-turbine flow unsteadiness pressure pulsation guide vane opening numerical simulation |
| Indexed By | CSCD |
| Language | 英语 |
| CSCD ID | CSCD:6605530 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/141567 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.Harbin Institute Technol, Sch Energy Sci & Engn, Harbin 150001, Heilongjiang, Peoples R China 2.中国科学院金属研究所 3.Northeast Elect Power University, Sch Energy & Power Engn, Jilin 132012, Jilin, Peoples R China 4.Sun Yat Sen Univ, Sino French Institute Nucl Engn & Technol, Zhuhai 519082, Peoples R China 5.Harbin Institute Large Elect Machinery, State Key Lab Hydropower Equipment, Harbin 150040, Heilongjiang, Peoples R China |
| Recommended Citation GB/T 7714 | Maxime Binama,Su Wentao,Cai Weihua,et al. Investigation on reversible pump turbine flow structures and associated pressure field characteristics under different guide vane openings[J]. SCIENCE CHINA-TECHNOLOGICAL SCIENCES,2019,62(11):2052-2074. |
| APA | Maxime Binama.,Su Wentao.,Cai Weihua.,Li FengChen.,Wei XianZhu.,...&David Wekesa W.(2019).Investigation on reversible pump turbine flow structures and associated pressure field characteristics under different guide vane openings.SCIENCE CHINA-TECHNOLOGICAL SCIENCES,62(11),2052-2074. |
| MLA | Maxime Binama,et al."Investigation on reversible pump turbine flow structures and associated pressure field characteristics under different guide vane openings".SCIENCE CHINA-TECHNOLOGICAL SCIENCES 62.11(2019):2052-2074. |
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