TwinMesh for Reliable CFD Analysis of Screw Compressors and ExpandersCombining TwinMesh and ANSYS CFX offers engineers a unique, efficient and fast workflow for transient, three-dimensional computational fluid and thermal analysis (cfd) of Screw Compressors, Expanders and Superchargers.
Developers of Screw Machines Need to:
- Analyse the impact of changing operation requirements (e.g pressure difference, rotation speed, impact of external temperatures, etc.)
- Have a deep understanding of their machine dynamics
- Be able to answer specific customer demands (CoP, noise emission)
- Produce fast and reliable answers
Thanks to our novel software TwinMesh real virtual product development is now available for twin screw machines! TwinMesh and ANSYS CFX together allow for efficient and reliable CFD analysis of screw compressors and expanders.
No More Numerical Limits
Common limitations of CFD software packages for screw compressor or expander geometries such as limited physics, insufficient mesh resolution or numerical errors due to bad mesh quality or interpolation errors or overlapping mesh method are redundant for the TwinMesh approach.
Using structured grids from the TwinMesh software engineers of screw machines get access to the full capability of CFD modelling available in ANSYS CFX. The high quality meshes from TwinMesh result in reliable and stable CFD simulations at moderate model sizes and moderate calculation times for transient analysis. Even for multiphase simulation such as oil-injected or water-cooled screw compressors and expanders.
Reliable CFD Analysis of Screw Compressors and Expanders
And what can designers expect? CFD analysis results generated with TwinMesh and ANSYS CFX provide design engineers of oil-free (single-phase) and oil-injected (multi-phase) screw compressors and screw expanders with essential information such as:
- Velocity, pressure, and temperature fields within the working chambers, in axial and radial clearances, and in suction and discharge ports
- mass flow rates at different operation points
- Torques, moments, forces and machine efficiency (CoP)
- Leakage and losses
- Pulsation behaviour of the machine
- Mechanical wear, lubrication and cooling
- Duration and magnitude of acoustic sources (emission)
TwinMesh and ANSYS CFX together make a reliable, modern, and state-of-the-art engineering tool, which allows for fast, reliable and efficient analysis and optimization of oil-free and oil-injected screw machines.
Increase machine performance, efficiency, and durability by a better understanding of complex phenomena inside your machine.
Speed & Flexibility
Reduce your time-to-market and fasten your response time to changing demands significantly by massive use of virtual prototyping.
Drive real innovation by getting deeper insight into the details of your products and their interaction with connected systems.
Reduce development and manufacturing costs by massive use of virtual product development instead of time consuming measurements on physical prototypes.
CFD Results of Screw Compressor and Screw Expander Simulations
Animations of Screw Compressor Simulations
Flow in working chambers of a screw expander
Oil-injected screw compressor (multiphase)
Contact us for more information or book a free webinar
Related blog entries
The next preview of new features in TwinMesh 2018: we implemented a mesh interpolation method in User Fortran. So far, the time step size of the CFD simulation has to be set according to the desired revolution speed and the prescribed angle increment of the pre-generated meshes from TwinMesh. Now it is possible to set an arbitrary time step size, and the corresponding mesh is calculated with a spline interpolation between the pre-generated meshes at run-time.read more
Preview on new features in TwinMesh 2018: we have implemented non-reflective boundary conditions (NRBC) in ANSYS CFX via User Fortran in a stable and robust way so that they can be used for positive displacement compressors instead of the standard openings which are reflective (RBC). While RBC lead to standing waves, especially at pressure side with mass flow strongly pulsating and even flow reversal, NRBC allow pressure fluctuations from pressure port to travel to the outlet and leave there without any artificial reflections so that mass flow is more uniform and realistic.read more
Next free TwinMesh webinar on 3rd of July 2018 at 3pm (CEST): find out more about how TwinMesh and ANSYS CFX allow for reliable 3D CFD analysis of rotary positive displacement machines such as screw compressors, lobe pumps, vane pumps, Wankel engines, gear pumps, progressive cavity pumps, or scroll expanders!read more