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Screw Machines
Calculation of Screw Machine Processes
Fluid Flow Calculation
Computational Fluid Dynamics in Screw Machines
Continuum Model applied to Processes in Screw Machines
Governing Equations
Constitutive Relations
Multiphase Flow
Equation of State of Real Fluids
Turbulent Flow
Pressure Calculation
Boundary Conditions
Finite Volume Discretisation
Space Discretisation
Time Discretisation
Discretisation of Equations
Solution of a Coupled System of Nonlinear Equations
Calculation of Screw Compressor Integral Parameters
Grid generation of Screw Machine Geometry
Types of Grid Systems
Properties of a Computational Grid
Grid Topology
Decomposition of a Screw Machine Working Domain
Generation and Adaptation of Domain Boundaries
Adaptation Function
Adaptation Variables
Adaptation Based on Two Variables
Mapping the Outer Boundary
Algebraic Grid Generation for Complex Boundaries
Standard Transfinite Interpolation
Ortho transfinite interpolation
Simple Unidirectional Interpolation
Grid Orthogonalisation
Grid Smoothing
Moving Grid
Computer Program
Applications
Flow in a Dry Screw Compressor
Grid Generation for a Dry Screw Compressor
Mathematical Model for a Dry Screw Compressor
Comparison of the Two Different Rotor Profiles
Flow in an Oil Injected Screw Compressor
Grid Generation for an Oil-Flooded Compressor
Mathematical Model for an Oil-Flooded Compressor
Comparison of the Numerical and Experimental results for an Flooded Compressor
Influence of Turbulence on Screw Compressor Flow
The Influence of the Mesh Size on Calculation Accuracy
A Refrigeration Compressor
Grid Generation for a Refrigeration Compressor
Mathematical Model of a Refrigeration Compressor
Three Dimensional Calculations for a Refrigeration Compressor
Fluid-Solid Interaction
Grid Generation for Fluid-Solid Interaction
Numerical Solution of the Fluid-Solid Interaction
Presentation and Discussion of the Results of Fluid-Solid Interaction
Conclusions
A Models of Turbulent Flow
B Wall Boundaries
C Finite Volume Discretisation