EXPERIMENTAL STUDY on DYNAMIC CHARACTERISTICS of FLUID-CONVEYING PIPE for OTEC

Ryoya Hisamatsu, Ristiyanto Adiputra, Tomoaki Utsunomiya

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

A commercial-scale Ocean Thermal Energy Conversion (OTEC) floating plant will be attached a large diameter Cold Water Pipe (CWP). There are concerns about unstable vibration and changes in the dynamic characteristic due to too large mass flow rate. Since the vibration may interfere development of larger capacity plant, comprehending the phenomena have generated considerable interest. The main objective of this study is to confirm whether the theory that describes the vibration of submerged fluid-conveying pipe reproduces the real phenomena through a tank experiment. We construct the experiment eliminated possible disturbances, and the free damping vibration of polycarbonate pipe of 4 m length is measured during water intake. In order to compare the experimental pipe and theoretical models, the damping characteristics are identified from the results without internal flow. As a result of the comparison, although the theoretical model using the inlet end condition reproduces basically reproduced the experiment, we observe a three dimensional nonlinear behavior that could not be predicted by the theory. We believe that this experiment will serve to improve the theories.

Original languageEnglish
Title of host publicationOcean Space Utilization
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791885888
DOIs
Publication statusPublished - 2022
EventASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2022 - Hamburg, Germany
Duration: Jun 5 2022Jun 10 2022

Publication series

NameProceedings of the International Conference on Offshore Mechanics and Arctic Engineering - OMAE
Volume4

Conference

ConferenceASME 2022 41st International Conference on Ocean, Offshore and Arctic Engineering, OMAE 2022
Country/TerritoryGermany
CityHamburg
Period6/5/226/10/22

All Science Journal Classification (ASJC) codes

  • Ocean Engineering
  • Energy Engineering and Power Technology
  • Mechanical Engineering

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