Phase relation of forces between multiple bends
conference paper
Multiphase flow induced vibrations are difficult to calculate. This is in part the prediction of the force frequency spectrum at a single bend, part the influence of bends on the multiphase flow behavior and therefore the prediction of the multiphase flow characteristics between bends. In this paper, the evolution of the forces between subsequent bends are discussed including the phase relations of the forces on the different bends. For annular flow, the forces between the different bends are incoherent and are more or less random. However, for stratified and especially slug flow, the forces remain coherent up to high frequencies. This means in a frequency response analysis of a piping structure, the transport velocity of the multiphase structures must be taken into account.
Topics
TNO Identifier
871712
ISSN
0277027X
ISBN
9780791858950
Publisher
American Society of Mechanical Engineers ASME
Article nr.
PVP2019-93543
Source title
ASME Pressure Vessels and Piping Conference, PVP 2019, 14-19 July 2019, San Antonio, TX, USA
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