Oil & Gas / Processes
Pipe Sloshing Analysis
Context
The origin of this project was a possible clogging of the oil drain in a lubrication system of a gas turbine located on a barge at the seaside. In the event of failure, the turbine shaft bearing is no longer lubricated, it tightens and can cost millions of euros in repairs.
Resolution
This study consisted of a two-phase (air/oil) modeling of the circuit. It also consisted of an analysis of transient behavior, taking into account the effects of different swells(frequencies and intensities).
Results
The study showed that the oil was properly drained by gravity and that there was no risk of clogging. This allowed our customer to validate its bearing lubrication system and reassure its own customer.
Erosion in Pipelines
Context
The purpose of this project was to determine sand erosion in a FLNG ship piping system.
Resolution
During this project, eight operating points were studied (fluid mixtures, solid loads, type of sand particles). Multi-decennial operating scenarios were established (site changes, different extracted gases).
Results
The study obtained the rate of erosion, as well as the rate of erosion. Areas of maximum erosion were identified as well as particle trajectories and impact locations. This type of modeling allows predictive and efficient site maintenance.
Core-in-Shell
Context
What are the phenomena provoking the dragging of drops towards the outlet nozzles?
Resolution
Several numerical models have been launched with different liquid/steam supply systems and at different positions.
Results
Numerical simulation was used to determine the core-in-shell configuration for which there was no drip training to the exit nozzles.
Hydraulic Valve
Context
The objective of this project was to analyze by CFD the internal flow of a hydraulic valve in order to determine areas of erosion.
Resolution
Based on a 3D geometry, a numerical analysis of the internal flow of the valve was carried out for a given valve position.
Results
The study showed that the flows could reach very high speeds. It made it possible to locate areas at risk of erosion, and also to calculate head losses.
Food Tank
Context
How to predict with CFD the phenomena of depressurization / repressurization of a food tank subjected to non-conforming conditions of use.
Resolution
The study consisted of an unsteady analysis of depressurization. It was necessary to take into account the condensation of water vapor, induced by the sudden change in temperature from 90°C to 25°C.
Results
The numerical simulation approach demonstrated the phenomenon of depressurization that was observed in the client. The results obtained made it possible to validate the choice of the rupture disc.
Mixing Reactor
Context
The customer wanted to study a new system for liquid analysis in a stirred tank and verify that the design met the criteria for extracting the fluid for analysis.
Resolution
A dynamic analysis of the process was carried out, taking into account the rotation of the blades within the tank.
Results
The simulation was used to highlight the velocities and current lines, and to analyze the flow in the reactor.
Blowing on an Engine Cylinder Head
Context
The objective of this project was to adapt the space-time cooling of an engine cylinder head.
Resolution
The study began with the meshing of the fluid and solid domains. The simulation part was then started. It consisted of transient calculations for different blower speeds.
Results
Numerical simulation was used to highlight dead zones inside the cylinder head, map temperatures, and detect under- and over-cooled areas. It also made it possible to obtain the curves of the temporal evolution of the temperatures at the probes.
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