# Accession Number:

## ADA093100

# Title:

## PAN AIR - A Computer Program for Predicting Subsonic or Supersonic Linear Potential Flows About Arbitrary Configurations Using a Higher Order Panel Method. Volume II. User's Manual (Version 1.0).

# Descriptive Note:

## Contractor rept. Jan 1978-May 1980,

# Corporate Author:

## BOEING MILITARY AIRPLANE CO SEATTLE WA

# Personal Author(s):

# Report Date:

## 1980-05-15

# Pagination or Media Count:

## 669.0

# Abstract:

PAN AIR is a system of computer programs for the detailed analysis and the non-iterative design of arbitrary configurations on steady, inviscid, subsonic and supersonic flows. PAN AIR uses a higher order panel method for the numerical solution of the appropriate lineraized potential flow equations. The configuration surface is approximated by a set of panels on which unknown source and doublet singularity distributions are defined. By imposing boundary conditions at a discrete set of points, the integral equation solution to the partial differential equation is reduced to a system of linear algebraic equations relating the unknown singularity strengths. These equations are solved for the singularity strengths which in turn determine the properties of the flow field. PAN AIR is called a higher order panel method because the singularity distributions are generally not constant on each panel. This property enables the doublet strength to be made continuous, a feature which is critically important for obtaining numerically stable solutions in supersonic flow. The method allows the analysis of flow about arbitrary configurations, reduces the sensitivity of the solution to the details of the panel layout, and also allows higher efficiency in the analysis and solution procedures. This volume is the Users Manual for the PAN AIR software system.

# Descriptors:

- *COMPUTERIZED SIMULATION
- *SUBSONIC FLOW
- *SUPERSONIC FLOW
- *POTENTIAL FLOW
- AERODYNAMIC CONFIGURATIONS
- MATHEMATICAL MODELS
- STEADY STATE
- THEORY
- BOUNDARY LAYER
- SURFACES
- SOLUTIONS(GENERAL)
- COEFFICIENTS
- CONFIGURATIONS
- BOUNDARY VALUE PROBLEMS
- USER NEEDS
- GREENS FUNCTIONS
- INTEGRAL EQUATIONS
- INVISCID FLOW
- INSTRUCTION MANUALS
- SPLINES(GEOMETRY)
- LINEAR ALGEBRAIC EQUATIONS

# Subject Categories:

- Fluid Mechanics