TwinMesh for Reliable CFD Analysis of Screw Compressors and Expanders
Combining TwinMesh and ANSYS CFD 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 CFD 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 CFD. 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 CFD 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 CFD 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.
Better Designs
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 Innovation
Drive real innovation by getting deeper insight into the details of your products and their interaction with connected systems.
Reduced Costs
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
Example for a mesh of the flow volume around the rotors (radial, axial) of a screw compressor
Grid quality check in TwinMesh for a mesh of a screw compressor
Flow visulaization in the axial gap of a screw compressor
Pressure and velocity vectors in clearances of a twin screw expander
multiphase simulation of oil-injection into a screw compressor
Pressure distribution in a twin screw compressor
3D-view of mesh for a screw machine with variable pitch
Define individual wrap angle in TwinMesh
Animations of Screw Compressor Simulations
Flow in working chambers of a screw expander
Oil-injected screw compressor (multiphase)
Related blog entries
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Preview of new applications with the TwinMesh 2024-Release
The new release of TwinMesh, version 2024 coming in October 2023, allows the CFD simulation of more complex applications.
CFD simulation of positive displacement machines considering the bending line due to pressure forces
In this CFD simulation, a double flow / two-sided SRM screw compressor has been setup with air at inlet pressure 1 bar, outlet pressure 6 bar and rotational speed of 12,333 rpm.
TwinMesh is available for these PD Machines
