Fluent对旋转式动力机械的分析(ppt 164页)

主要内容
Introduction to Rotating Machinery Analysis Using Fluent
Agenda
Motivation
Examples of Rotating Machinery
Goals of the Training
Types of Rotating Machinery
Classification of Turbomachinery
Basic Problem Statement
Modeling Approaches
Single Reference Frame(SRF) Modeling
Introduction to the SRF Model
Illustration of SRF model
Implications of SRF
Stationary Walls in SRF Models
N-S Equations: Rotating Reference Frame
Reference Frames
Assumptions and Definitions
The Velocity Triangle
Relative Velocity Formulation
Relative Velocity Formulation (2)
Relative Velocity Formulation (3)
Absolute Velocity Formulation
Absolute Velocity Formulation (2)
Absolute Velocity Formulation (3)
SRF Geometries: 2-D
SRF Geometries: 3-D
Choice of Solver
Boundary Conditions and Physical Models
Fluid BCs
Velocity Inlets
Pressure Inlets (1)
Pressure Inlets (2)
Mass Flow Inlets
Pressure Outlets
Backflow
Wall BCs
Periodic BCs
Turbulence Models for Rotating Machinery
DPM Modeling
Other Models
Solver Settings (1)
Solver Settings (2)
Example SRF Calculations
Disk Cavity
Disk Cavity - Mesh
Disk Cavity - Stream Function
Radial Velocity Profile (r/b = 0.633)
Radial Velocity Profile (r/b = 0.833)
Disk Cavity - Results
Propeller Fan
Propeller Fan - Mesh
Comparison to Data: Head Coefficient
Comparison to Data: Power Coefficient
Fan Flowfield: Flow Coefficient = 0.1
Fan Flowfield: Flow Coefficient = 0.35
Fan Flowfield: Flow Coefficient = 0.5
SRF Appendix
Labyrinth Seal
Labyrinth Seal - Mesh
Labyrinth Seal - Total Temperature
Total Temperature (2)
Comparison with Data
Transonic Axial Compressor
Rotor 37 - Mesh
Comparison with Data - Pressure Ratio
Pressure Ratio - Choked Flow
Relative Mach No. - Choked Flow
Pressure Ratio - 94.3% Relative Massflow
Relative Mach No. - 94.3% Relative Massflow
Multiple Reference Frame(MRF) Modeling
Introduction
What is the MRF Model?
Implications of the MRF Model
Illustration of Interface Rules for MRF
Limitations of the MRF Model
Setting Up MRF Problems
Non-conformal Interfaces
Illustration of Non-conformal Interface
Example MRF Calculations
3-D Squirrel Cage Blower
Blower Geometry
Squirrel Cage Blower: Mesh
Comparison to Data: Hydraulic Efficiency
Surface Pressure Distribution: Low Flow
Surface Pressure Distribution: High Flow
Cross Sectional View of Blower Flowfield
Backward Inclined Centrifugal Fan
Centrifugal Fan - Geometry
Centrifugal Fan - Mesh
Comparison with Test Data (1)
Comparison with Test Data (2)
Surface Pressure - High Flowrate
Surface Pressure - Low Flowrate
Centrifugal Water Pump
Water Pump - Geometry
Water Pump - Mesh
Water Pump - Velocity Contours
Water Pump - Comparison with Data
Mixing Plane Modeling
Introduction (2)
Mixing Plane Illustration
Advantages of the Mixing Plane Model
MPM Implementation
MPM Implementation (2)
Axial vs Radial Mixing Planes
MPM Setup
Mixing Plane Interpolation
Mixing Plane Limitations (1)
Mixing Plane Limitations (2)
Example Mixing Plane Calculations
Axial Compressor
Axial Compressor Stage - Grid
Surface Pressure Contours
Total Pressure Contours - Midspan Surface
Total Temperature Contours - Midspan Surface
Mach Number Contours - Midspan Surface
Multistage Turbine
Multistage Turbine - Mixing Planes
Multistage Turbine - Geometry
Midspan Total Pressure: Design
Midspan Total Temperature: Design
Midspan Total Pressure - Off Design
Midspan Total Temperature - Off-Design
Comparisons with Data: Design
Comparison with Data: Off-Design
Sliding Mesh Modeling
Illustration of Unsteady Interactions
What is the Sliding Mesh Model?
N-S Equations: Moving Mesh Form
Moving Mesh Illustration
N-S Equations: Moving Mesh (1)
N-S Equations: Moving Mesh (2)
Pros and Cons of SMM
Sliding Interfaces
SMM Setup
Solving SMM Problems
Choosing a Timestep for the SMM
Example Sliding Mesh Calculations
2-D Turbine Stage
2-D Turbine Stage (2)
2-D Turbine Stage: Mesh
Pressure Contours - Mixing Plane Solution
Mach No. Contours - Mixing Plane Solution
Stator Pressure Distribution Comparison
Rotor Pressure Distribution Comparison
2-D Blower
2-D Blower: Grid
2-D Blower: Unsteady Total Pressure
2-D Blower - Static Pressure
2-D Blower Results
1.5 Stage Research Turbine (1)
1.5 Stage Research Turbine (2)
1.5 Stage Turbine: Geometry
Surface Pressure Coefficient Contours
Pitch-Averaged Yaw Angles (1)
Pitch-Averaged Yaw Angles (2)
Pitch-Averaged Mach Number Profiles (1)
Pitch-Averaged Mach Number Profiles (2)

 

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