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Posts
- Category: COMPUTATIONAL AEROACOUSTICS (continued)
- Stability of the Three-Parameter Time-Domain Impedance Boundary Condition
- A Three-Parameter Broadband Model
- Time-Domain Impedance Boundary Condition
- Internal Flow Driven by a Pressure Gradient
- Boundaries with Discontinuities
- PML in Three Dimensions
- Perfectly Matching and Stability Consideration
- Derivation of the PML Equation
- Perfectly Matched Layer as an Absorbing Boundary Condition
- R Derivative of the Velocity Field
- The General Case
- Axis Boundary Treatment
- Outflow Boundary Conditions: Further Consideration
- Entrainment Flow
- Boundaries with Incoming Disturbances
- Advanced Numerical Boundary Treatments
- Variable Artificial Selective Damping
- Spurious Oscillations: Origin and Characteristics
- Computation of Nonlinear Acoustic Waves
- Develop an artificial selective damping stencil for a high-order scheme involving 17 mesh points
- Coefficients of Several Large Damping Stencils
- Aliasing
- Artificial Damping at Surfaces of Discontinuity
- Damping-Induced Numerical Instability
- Artificial Viscous Diffusion
- Excessive Damping
- Other Damping Stencils
- Numerical Example
- Basic Concept
- Artificial Selective Damping
- The Short Wave Component of Finite Difference Schemes
- Enforcing Wall Boundary Conditions on Curved Surfaces
- Cartesian Boundary Treatment of Curved Walls
- Oscillating Viscous Boundary Layer Adjacent to a Solid Wall
- Effect of Mean Flow
- Reflection of a Transient Acoustic Pulse by a Wall
- Numerical Examples
- Reflection of Acoustic Waves by a Plane Wall
- Concept of Ghost Points and Ghost Values
- The Ghost Point Method for Wall Boundary Conditions
- Generalized Radiation and Outflow Boundary Conditions
- Numerical Simulation: An Example
- Implementation of Radiation and Outflow Boundary Conditions
- Radiation Boundary Conditions
- Radiation, Outflow, and Wall Boundary Conditions
- DRP Scheme in Curvilinear Coordinates
- Time Step At: Accuracy Consideration
- Group Velocity for Finite Difference Schemes
- Numerical Stability
- Dispersion-Relation-Preserving (DRP) Scheme
- The Acoustic Wave
- Finite Difference Solution of the Linearized Euler Equations
- Multidimensional Waves
- Origin of Numerical Dissipation
- Numerical Dispersion Arising from Temporal Discretization
- Origin of Numerical Dispersion
- Group Velocity and Dispersion
- Dispersive Waves of Physical Systems
- 4 Finite Difference Scheme as Dispersive Waves
- Stability Diagram
- Optimized Multilevel Time Discretization
- Single Time Step Method: Runge-Kutta Scheme
- Time Discretization
- Coefficients of Several Large Optimized Stencils
- Backward Difference Stencils
- Schemes with Large Stencils
- Group Velocity Consideration
- . Shifting Theorem
- Spatial Discretization in Wave Number Space
- Boundary Modes
- The Transmission Problem
- Finite Difference Model for a Surface of Discontinuity
- Fourth-Order Approximation
- . Second-Order Approximation
- Finite Difference Solution
- Analytical Solution
- Finite Difference Solution as an Approximate Solution of a Boundary Value Problem
- Complex Roots
- Repeated Roots
- Distinct Roots
- Linear Difference Equations with Constant Coefficients
- Finite Difference Equations
- Computational Aeroacoustics
- Category: Dynamics of Flight
- Data for the Boeing 747-100
- The Standard Atmosphere and Other Data
- M. a. Chord and m. a. Center for Swept and Tapered. Wings (Subsonic)
- Comparison of m. a. Chord and m. a. Center for. Basic Planforms and Loading Distributions
- Mean Aerodynamic Chord, Mean Aerodynamic Center, and Cm
- TRANSFORMATION OF INERTIAS
- Changes in Inertias and Stability Derivatives with. Change of Body Axes
- Wing Yawing Derivatives C/r, Cnr
- Wing Rolling Derivatives Clp, Cnp
- LIFT DUE TO SLIPSTREAM
- Propeller and Slipstream Effects
- Tab Effectiveness, b3
- Control Hinge Moments
- Data for Estimating. Aerodynamic Derivatives
- Velocity and Acceleration in an Arbitrarily. Moving Frame
- Computation of Eigenvalues and Eigenvectors