TY - GEN
T1 - Simulation of Transient Flow in Micro-hydraulic Pipe System
AU - Urbanowicz, Kamil
AU - Stosiak, Michał
AU - Towarnicki, Krzysztof
AU - Duan, Huan Feng
AU - Bergant, Anton
N1 - Funding Information:
Acknowledgements. Bergant gratefully acknowledges the support of Slovenian Research Agency conducted through the research project L2-1825 and the programme P2-0162.
Publisher Copyright:
© 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG.
Copyright:
Copyright 2020 Elsevier B.V., All rights reserved.
PY - 2020/10
Y1 - 2020/10
N2 - This paper presents the modelling and simulation of transient flow in micro-hydraulic pipe systems. Liquid stream energy dissipation occurs mainly as a result of friction losses. Theoretical considerations of water hammer resulting from rapid valve closing, supported by experimental verification, were undertaken. The experimental system incorporated a straight two-meters long section of a steel pipe with an internal diameter of 4·10−3 m. An attempt was made to determine the degree of conformity of the transient flow model (previously verified in conventional pipes) to the experimental results obtained for small-internal-diameter pipes. Shear stress on the pipe wall was modelled using first a simplified quasi-steady approach and then an effective modified unsteady friction model. The pressure waveforms at the valve (at the downstream end of the pipe) were obtained for initial flow velocity, v01 = 2.39 m/s and v02 = 1.14 m/s, respectively. Experimental studies were carried out in the region of laminar flows with Reynolds numbers below 100.
AB - This paper presents the modelling and simulation of transient flow in micro-hydraulic pipe systems. Liquid stream energy dissipation occurs mainly as a result of friction losses. Theoretical considerations of water hammer resulting from rapid valve closing, supported by experimental verification, were undertaken. The experimental system incorporated a straight two-meters long section of a steel pipe with an internal diameter of 4·10−3 m. An attempt was made to determine the degree of conformity of the transient flow model (previously verified in conventional pipes) to the experimental results obtained for small-internal-diameter pipes. Shear stress on the pipe wall was modelled using first a simplified quasi-steady approach and then an effective modified unsteady friction model. The pressure waveforms at the valve (at the downstream end of the pipe) were obtained for initial flow velocity, v01 = 2.39 m/s and v02 = 1.14 m/s, respectively. Experimental studies were carried out in the region of laminar flows with Reynolds numbers below 100.
KW - Laboratory apparatus
KW - Method of characteristics
KW - Micro-hydraulic pipe
KW - Modelling
KW - Unsteady friction
KW - Wall shear stress
KW - Water hammer
UR - http://www.scopus.com/inward/record.url?scp=85096432808&partnerID=8YFLogxK
U2 - 10.1007/978-3-030-59509-8_18
DO - 10.1007/978-3-030-59509-8_18
M3 - Conference article published in proceeding or book
AN - SCOPUS:85096432808
SN - 9783030595081
T3 - Lecture Notes in Mechanical Engineering
SP - 205
EP - 215
BT - Advances in Hydraulic and Pneumatic Drives and Control, NSHP 2020
A2 - Stryczek, Jaroslaw
A2 - Warzynska, Urszula
PB - Springer Science and Business Media Deutschland GmbH
T2 - International Scientific-Technical Conference on Hydraulic and Pneumatic Drives and Controls, NSHP 2020
Y2 - 21 October 2020 through 23 October 2020
ER -