Dynamics of large-diameter water pipes in hydroelectric power plants

HYPERBOLE Symposium 2017 (HYdropower plants PERformance and flexiBle Operation towards Lean integration of new renewable Energies)

Pavi, G.^1 ; Chevillotte, F.^2 ; Heraud, J.^3

LVA, INSA de Lyon, Villeurbanne

69621, France^1

Matelys Research Lab, Vaulx en Velin

69120, France^2

MPSH, EDF-DTG, Grenoble

38040, France^3

关键词: Breathing modes;    Dynamic phenomena;    Key factors;    Large diameter;    Large diameter pipes;    Non-intrusive sensors;    Pressure pipes;    Pressure pulsation;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/813/1/012042/pdf
DOI  :  10.1088/1742-6596/813/1/012042

来源: IOP

【 摘 要 】

An outline is made of physical behaviour of water - filled large pipes. The fluid-wall coupling, the key factor governing the pipe dynamics, is discussed in some detail. Different circumferential pipe modes and the associated cut-on frequencies are addressed from a theoretical as well as practical point of view. Major attention is paid to the breathing mode in view of its importance regarding main dynamic phenomena, such as water hammer. Selected measurement results done at EDF are presented to demonstrate how an external, non-intrusive sensor can detect pressure pulsations of the breathing mode in a pressure pipe. Differences in the pressure measurement using intrusive and non-intrusive sensors reveal the full complexity of large-diameter pipe dynamics.