Development of an Integrated Analytical Model to Predict the Wet Collapse Pressure of Flexible Risers

A flexible riser is a multi-layered pipe device which enables deep-water production by connecting seabed facilities to floating vessels. To withstand huge hydro-static pressure, it is required to have strong collapse capacities. At present, the collapse capacity of a flexible riser is designed based on a "wet collapse'' concept, in which the...

Development of an analytical model for predicting the wet collapse pressure of curved flexible risers

Flexible risers are designed with strong anti-collapse capacities which enable them to operate in deep-water reservoirs. However, this anti-collapse capacity is susceptible to the pipe curvature in the flooded annulus condition. For the curved riser sections within the touch-down zone, significant reduction of collapse capacity can occur once...

Curvature effect on wet collapse behaviours of flexible risers subjected to hydro-static pressure

Flexible risers that for deep-water production are designed with strong collapse capacity. However, this collapse capacity is susceptible to pipe curvature in the flooded annulus condition. For the curved riser sections within the touchdown zone, significant reduction of collapse capacity can occur once the external sheaths are worn out,...

Modeling curvature effects on turbulence for turbomachinery flows

In aircraft engines, especially in turbomachinery components, large part of the flow along the surface is laminar or transitional. The boundary layer development, losses, efficiency and heat transfer are greatly affected by the location and extend of the laminar-to-turbulent transition. The accurate prediction of the transition process is...