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Posts
- Category: Canonical impulse solutions (continued)
- Small-Disturbance Compressible Flows
- Limitations of full potential solutions
- Compressible Potential Flows
- Shock Waves and Wave Drag
- . Compressible Flow Quantities
- Transonic flow and shock waves
- Flow-field changes
- Compressible Aerodynamic Flows
- Apparent mass
- . General motion solution
- Canonical impulse solutions
- Category: COMPUTATIONAL AEROACOUSTICS
- Sample Computer Programs
- . Generation of Broadband Sound Waves with a Prescribed Spectrum by an Energy-Conserving Discretization Method
- Accelerated Convergence to Steady State
- Diffusion Equation
- The Method of Characteristics
- The Method of Stationary Phase
- Fourier and Laplace Transforms
- Screech Tone Frequency and Intensity
- Numerical Results and Comparisons with Experiments
- Artificial Selective Damping
- Numerical Boundary Conditions
- Grid Design and Computational Scheme
- Computation of Axisymmetric Jet Screech
- Example II: Numerical Simulation of Axisymmetric Jet Screech
- RANS Computation: the k - e Model
- Large Eddy Simulation
- Computation of Turbulent Flows
- Sound Generation Processes
- Energy Source of Airfoil Tones
- 15.4.2.2 Acoustics
- Flow Field
- Grid Refinement
- Selection of Time Step
- Distribution of Artificial Selective Damping
- Computational Algorithm and Boundary Conditions
- Grid Design and Computational Domain
- Direct Numerical Simulation
- NACA Four-Digit Airfoils
- Inverse Mapping from the w Plane to the Physical Plane
- Mesh Design: Body-Fitted Grid
- . Turbulent Boundary Layer
- Laminar Boundary Layer
- Two-Dimensional Turbulent Jet
- Two-Dimensional Turbulent Mixing Layer
- Spatial Resolution Requirements
- Distribution of Artificial Selective Damping
- Boundary Conditions
- Computational Algorithm
- Computational Grid
- Computational Domain
- Computational Model
- Design of Computational Aeroacoustic Codes
- A Test Case: A Broadband Monopole Source
- Continuation of Broadband Near Acoustic Field on a Conical Surface to the Far Field
- Generation of a Random Broadband Acoustic Field
- Time Periodic Sources
- Computation of the Adjoint Green’s Function for a Conical Surface
- Adjoint Green’s Function for a Conical Surface
- Adjoint Green’s Function for a Cylindrical Surface
- Computation of the Adjoint Green’s Function: Free Field Solution
- The Adjoint Green’s Function
- Surface Green’s Function: Normal Velocity as the Matching Variable
- Surface Green’s Function: Pressure as the Matching Variable
- The Continuation Problem
- Continuation of a Near-Field Acoustic Solution to the Far Field
- Sliding Interface Problem in Three Dimensions
- Sliding Interface Problems
- Plane Wave Scattering Problem
- Numerical Examples: Scattering Problems
- Global Interpolation
- Interpolation Errors in Wave Number Space
- Order Constraints
- Optimized Multidimensional Interpolation
- Complex Geometry
- Coefficients of Several Large Buffer Stencils
- Artificial Selective Damping
- The Governing Equations and the Computational Algorithm
- Computation Domain and Grid Design
- Second Example: Acoustic Resonances Induced by Flow over an Automobile Door Cavity
- Asymptotic Solution
- Artificial Selective Damping
- Grid Design
- Numerical Examples
- Damping Stencils
- Time Marching Stencil
- Spatial Stencils for Use in the Mesh-Size-Change Buffer Region
- A Numerical Example
- Optimized Interpolation Method
- Additional Constraint on Optimized Extrapolation
- Extrapolation Error in Wave Number Space
- Wave Number Analysis of Extrapolation
- Extrapolation and Interpolation
- Scattering by Thin Circumferential Splices
- Scattering by Very Thin Axial Splices
- Scattering of Acoustic Duct Mode at the Entrance and Exit of an Inlet Duct
- Acoustic Wave Propagation and Scattering in a Duct with Acoustic Liner Splices
- A Numerical Example
- Impedance Boundary Condition in the Presence of a Subsonic Mean Flow