Flexible risers such as flexible pipes and umbilical cables find increasing application in the marine environment and represent a crucial element of a floating production system. At the same time, it provides ease of installation, retrieval and usage elsewhere. Flexible pipes and umbilical cables both work as composite pipes that are compliant and highly deformable in bending, but strong and stiff in response to internal pressure, external pressure, tension and torque. Umbilical cables generally consist of electrical conductors for signal and power transmissions that are surrounded by a number of protective layers. The protective layer is designed to secure the conductors from adverse chemical and mechanical damage. The objective of this work is to predict the temperature distribution of partially submersed umbilical cables under different operating and environmental conditions. The commercial code Fluent® was used to simulate the heat transfer and the air fluid flow of part of a vertical umbilical cable near the air-water interface. A free-convective three-dimensional turbulent flow in open-ended vertical annuli was solved. The influence of parameters such as the heat dissipating rate, wind velocity, air temperature and solar radiation was analyzed. The influence of the presence of a radiation shield consisting of a partially submersed cylindrical steel tube was also considered. The air flow and the buoyancydriven convective heat transfer in the annular region between the steel tube and the umbilical cable were calculated using the standard k-ε turbulence model. The radiative heat transfer between the umbilical external surface and the radiation shield was calculated using the Discrete Ordinates model. The results indicate that the influence of a hot environment and intense solar radiation may affect the umbilical cable performance in its dry portion.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Prediction of the temperature distribution of partially submersed umbilical cables




    Publication date :

    2012


    Size :

    8 Seiten, 10 Bilder, 3 Tabellen, 10 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Submersed type car washing device

    LI YUNLIANG | European Patent Office | 2015

    Free access

    VEHICLE FOR AERONAUTIC OPERATION AND SUBMERSED OPERATION

    MONROE PAUL / WORK DEVIN | European Patent Office | 2016

    Free access

    Attitude Control System For Submersed Floating Structure

    JO CHUL HEE / LEE KANG HEE | European Patent Office | 2017

    Free access

    Dynamic Analysis of Umbilical Cables for Maglev Vibration Isolation Systems

    Wu, Qianqian / Liu, Bilong / Cui, Ning et al. | AIAA | 2019