Acoustics, Fluid flows

noise and vibration reduction by flow improvement.

Our customer, Tupras Refineries in Turkey, operates several refineries. In one of the installations, strong vibrations occurred on the air ducting between the combustion air fan and the boiler. Demcon multiphysics performed a study with the goal to propose improvements in order to reduce these vibrations.

Reduction of unwanted vibrations

our approach.

Based on our experience in noise and vibration control, and our experience with similar types of installations, an initial assessment was made for possible causes of these vibrations.

It showed a region with poor flow conditions directly behind the air fans, which was likely to cause the low frequency noise and vibrations. Since this installation should be able to run either on an electric driven fan or on a steam turbine driven fan, a T-junction was used to guide the flow towards the boiler.

Therefore, we analyzed the flow as a possible cause of the vibrations by CFD calculations. These calculations showed that in the T-junction and directly behind it, large vortices and turbulence occurs, which were the cause of the unwanted vibrations.


‘noise and vibrations’

In general, noise and vibrations are symptoms of wasted energy, just as heat. To reduce noise and vibrations at the source is often equal to improving energy performance and the lifetime of the machine or installation. Very useful for our clients.

Demcon multiphysics.

Demcon multiphysics is an engineering agency with high-end expertise in the area of heat transfer, fluid dynamics, structural mechanics, acoustics, electromagnetism and nuclear physics. We support clients from a wide variety of market sectors and help them achieve their goals in research and development with deep physical insights.

We combine fundamental physical knowledge from an analytical approach with Computer Aided Engineering (CAE) simulations tools from ANSYS, MATHWORKS, COMSOL, STAR-CCM+ and FLUKA to setup, execute, analyze and evaluate numerical simulations. The use of Computational Fluid Dynamics (CFD), Finite Element Analysis (FEM / FEA), Lumped Element Modelling (LEM), Computational Electromagnetics (CEM) and Monte Carlo simulations enables us to make a virtual prototype of your design. With these techniques we can simulate the fluid and gas flows, energy exchange, heat and mass transfer, stresses, strains and vibrations in structures and the interaction of electromagnetic fields with other physical aspects like heat generation. Simulation-driven product development increases the development efficiency and reduces the product development time. Our services can therefore fully support you in the designing phase, from idea up to prototype, from prototype to final design.