Structural mechanics, Fluid flow

structural and fluid flow optimization of radial turbine blower.

Demcon macawi respiratory systems is a total solution provider of respiration technology. Their OEM blower modules are suitable for use in respiratory systems, anesthesia systems and other oxygen rich environments. A macawi module contains a.o. a radial turubine blower and a flow diffuser around it. The radial turbine blower needed to be optimized for simple integration into the module, noise reduction and mechanical vibration absorption. Simultaneously, the diffuser around the blower needed to be optimized for mixing air and oxygen, sufficient flowrates and have a good efficiency. An in depth multi-physical analysis was performed to ensure all above mentioned requirements.

Optimizing a respiratory blower module

our approach.

A structural mechanical Finite Element Analysis (FEA) was performed on the turbine rotor. The analysis included the rotational effects to determine maximum stresses, deformations and possible unstable behavior. Subsequently, Computational Fluid Dynamics (CFD) analysis was performed on the module to calculate the velocity field, flowrates, pressure drops and air-oxygen mixing for several different variations of the diffuser. This led to an effective improvement of the design without the need for prototype testing in a laboratory.


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.