Synthetic Study on Unstable Flow Phenomena in Turbomachineries under Extreme Operating Conditions and the Flow Control and Advance Detection

极端工况下透平机械不稳定流动现象及流量控制与提前检测综合研究

• 批准号: 10555061
• 负责人: FURUKAWA Akinori
• 金额: $ 8.06万
• 依托单位: KYUSHU UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (B).
• 财政年份: 1998
• 资助国家: 日本
• 起止时间: 1998 至 2000
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-10555061/
• 关键词: Turbo-type pump; Hydro turbine; Wind turbine; Cavitation; Stall; Vortex; Pressure fluctuation; Shaft vibration

The purpose of this research project is to find the guiding principles for developing turbomachineries, which are equipped with active and passive control devices and mechanisms for unstable flow phenomena under extreme operating conditions. As unstable flow phenomena in turbomachineries, the following subjects were focused in this research ; (1) the cavitation induced oscillation in pump-inducers, (2) the positive slope head characterisitics of ultra-low specific speed pump with extremely high pressure, (3) the unsteady characteristics, due to the vortex collapse, of the draft tube for ultra-low head hydro turbine, (4) the dynamic stall behavior of wind turbine blade under the extreme wind flow conditions and (5) Pressure fluctuations, due to the rotor/stator flow interaction, in diffuser pumps.. As these unstable flow behaviors might occur the shaft vibration, in addition of the above, the subject on the stable control of shaft vibration and the performance of sliding bearings under ultra-high speed shaft rotating conditions was also picked up. These researches ware carried out in each individual laboratory and the results were discussed together from the synthetic standpoint. Then, the flow mechanisms of unstable behaviors due to cavitation, stall, swirling vortex and blade-rows interaction were clarified and the useful information for the design and operation of turbomachineries to control and detect the unstable behaviors in advance.

本研究项目的目的是为开发装备有主动和被动控制装置和机构的水力发电机组找到指导原则，以应对极端操作条件下的不稳定流动现象。作为水电站中的不稳定流动现象，本研究主要围绕以下几个方面展开：（1）诱导轮的空化振荡;（2）超低比转速超高压力泵的正斜率水头特性;（3）超低水头涡轮机尾水管的旋涡溃灭非定常特性;（4）风力涡轮机叶片在极端风力条件下的动态失速行为;（5）扩散泵中由于转子/定子流动相互作用引起的压力波动。由于这些不稳定的流动行为可能会引起轴的振动，除此之外，本文还对超高速轴旋转条件下的轴振动稳定控制和滑动轴承性能进行了研究。这些研究是在各个实验室进行的，并从综合的角度对结果进行了讨论。阐明了空化、失速、旋转涡和叶排干扰等非稳定性的流动机理，为涡轮机的设计和运行提供了有用的信息，以便提前控制和检测非稳定性。

项目成果

Horiguchi, H., Watanabe, S., and Tsujimoto, Y.: "Theoretical Analysis of Cavitation in Inducers with Unequal Blades with Alternate Leading Edge Cutback : Part I Analytical Methods and Results for Smaller Amount of Cutback."Trans.ASME, J.of Fluids Eng.. Vo

Horiguchi, H.、Watanabe, S. 和 Tsujimoto, Y.：“具有交替前缘缩减的不等叶片导流器中空化的理论分析：第一部分较小缩减量的分析方法和结果。”Trans.ASME, J

Shi,F.,Tsukamoto,H.,Qin,W.: "Unsteady computations of Pressure Fluctuaion Downstream of a Diffuser Pump Impeller" Proceeding of the 1998 ASME Ruid Enqineening Division Summer Meeting. FED-Vol.245. 1-96 (1998)

Shi,F.,Tsukamoto,H.,Qin,W.：“扩散泵叶轮下游压力波动的非稳态计算”1998 年 ASME Ruid Enqineening Division 夏季会议论文集。

Horigochi,H.,Watanate,S.,Tsujimoto,Y.: "Theoretical Analysis of Cavitation in Inducere with Unequal Blades with Alternate Leeding Edge Cutback : Part II"Transaction of ASME, Journal of Fluid Engineering. 122-2. 419-425 (2000)

Horigochi,H.、Watanate,S.、Tsujimoto,Y.：“具有交替前缘缩减的不等叶片诱导空化的理论分析：第二部分”ASME 汇刊，流体工程学报。

Maeda,T.,Kamada,Y.,Slumizu,Y.,kokaza S.,Idomoto,T.,Bruining A.,Rooji,van.R..: "Unsteady Pressure Distribution on Rotating Blade of MIE University Open Air Rotor Research Facility"Proceedings of EWEC,1999, European Wind Energy Conference and Exhibition. 12

Maeda,T.,Kamada,Y.,Slumizu,Y.,kokaza S.,Idomoto,T.,Bruining A.,Rooji,van.R..：“MIE大学露天转子研究旋转叶片上的非稳态压力分布

Sum,S.,Tsukamoto,H.: "Namerical Approachas to Diffuser Pump Off-Design Performance"Proceedings of 2nd International Symposium on Fluid Machinery and Fluid Engineering. 253-266 (2000)

Sum,S.,Tsukamoto,H.：“扩散泵非设计性能的命名方法”第二届国际流体机械与流体工程研讨会论文集。