Unsteady regimes and pressure pulsations in draft tube of a model hydro turbine in a range of off-design conditions

Ivan Litvinov; Sergey Shtork; Evgeny Gorelikov; Andrey Mitryakov; Kemal Hanjalic

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Unsteady regimes and pressure pulsations in draft tube of a model hydro turbine in a range of off-design conditions

机译：在一系列非设计条件下型号水涡轮机草稿管中的不稳定制度和压力脉动

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?Moving away from the off-design condition leads to increase in the swirl numberS.

?ExceedingSabove 0.5 results in sharp growth of the flow pulsation level.

?Intense flow pulsations are caused by origination of a precessing vortex core.

?Nominal regime (BEP) does not coincide with the zero swirl regime.

Abstract

We report on experimental study of flow and pressure pulsations in draft-tube of a laboratory air model of Francis-99 hydro-turbine operating over a broad range of regimes employing a rapid prototyping of the swirl generators and computerized measurements. In total, 867 operating regimes were examined corresponding to different combinations of the runner rotation speed and flowrates. The velocity measured by a computer-automated laser-Doppler anemometer and the pressure recording by wall-mounted acoustic sensors for a selection of operating conditions reve

机译：<！[cdata [

亮点

？远离偏离设计条件的移动导致旋流号增加 s < /ce-意大利名字. ？超过 s 高于0.5导致流量脉动水平的急剧增长。？强烈的流量脉动是由源性涡旋核心引起的。

？ NOM Inal制度（BEP）与零旋流制度不一致。

抽象

我们报告了弗朗西斯实验室空气模型草坪管流动和压力脉动的实验研究报告 - 99水轮机在采用旋流发电机的快速原型设计和计算机化测量的广泛制度上运行。总共，检查了867次操作系统，对应于转轮转速和流量的不同组合。通过计算机自动化激光多普勒风速计测量的速度和壁挂式声学传感器的压力记录，用于选择操作条件reve

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来源
《Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics》 |2018年第2018期|共13页
作者
Ivan Litvinov; Sergey Shtork; Evgeny Gorelikov; Andrey Mitryakov; Kemal Hanjalic;
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作者单位

Institute of Thermophysics SB RAS;

Institute of Thermophysics SB RAS;

Institute of Thermophysics SB RAS;

Institute of Thermophysics SB RAS;

Novosibirsk State University;

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原文格式 PDF
正文语种 eng
中图分类流体力学;
关键词
Hydro turbine draft tubes; Precessing vortex core; PVC; Automated LDA; Rapid prototyping;

机译：水轮机牵伸管;涡旋芯;PVC;自动化LDA;快速原型;

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1. Unsteady regimes and pressure pulsations in draft tube of a model hydro turbine in a range of off-design conditions [J] . Ivan Litvinov, Sergey Shtork, Evgeny Gorelikov, Experimental Thermal and Fluid Science: International Journal of Experimental Heat Transfer, Thermodynamics, and Fluid Mechanics . 2018,第期

机译：在一系列非设计条件下型号水涡轮机草稿管中的不稳定制度和压力脉动
2. Laboratory modeling of flow regimes in a draft tube of Francis hydro-turbine [J] . Sergey Shtork, Ivan Litvinov, Andrey Mitryakov, EPJ Web of Conferences . 2017,第2期

机译：弗朗西斯水轮机尾水管内流态的实验室建模
3. IN SITU UNSTEADY PRESSURE MEASUREMENTS ON THE DRAFT TUBE CONE OF THE FRANCIS TURBINE WITH AIR INJECTION OVER AN EXTENDED OPERATING RANGE [J] . Sebastian MUNTEAN, Romeo F. SUSAN-RESIGA, Viorel C. CAMPIAN, University Politechnica of Bucharest scientific bulletin, D. Mechanical Engineering . 2014,第3期

机译：在扩展的工作范围内，通过空气注入对弗朗西斯涡轮的尾锥进行非定常压力测量
4. Simulation of Cavitating Flows in Francis Turbine and Draft Tube Under Off-design Conditions [C] . Charles C. S. Song, Xiangying Chen ASME/JSME Joint Fluids Engineering Conference . 2000

机译：在非设计条件下竞技涡轮机和牵引管空气流动的仿真
5. Combined effects of Reynolds number, turbulence intensity and periodic unsteady wake flow conditions on boundary layer development and heat transfer of a low pressure turbine blade. [D] . Ozturk, Burak. 2006

机译：雷诺数，湍流强度和周期性非稳态尾流条件对低压涡轮叶片边界层发展和传热的综合影响。
6. Cavitating flow-induced unsteady pressure pulsations in a low specific speed centrifugal pump [O] . Ning Zhang, Bo Gao, Zhong Li, 2018

机译：在低比转速离心泵中产生流致的非稳态压力脉动
7. Design of Experiments Applied to Francis Turbine Draft Tube to Minimize Pressure Pulsations and Energy Losses in Off-Design Conditions [O] . Arthur Favrel, Nak-joong Lee, Tatsuya Irie, 2021

机译：应用于频涡轮机牵伸管的实验设计，以最大限度地减少非设计条件下的压力脉动和能量损失

Unsteady regimes and pressure pulsations in draft tube of a model hydro turbine in a range of off-design conditions

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