# Multipoint Inverse Method for Multielement Airfoil Design

@article{Gopalarathnam1998MultipointIM, title={Multipoint Inverse Method for Multielement Airfoil Design}, author={Ashok Gopalarathnam and Michael S. Selig}, journal={Journal of Aircraft}, year={1998}, volume={35}, pages={398-404} }

A multipoint inverse method has been developed for the design of multielement airfoils with desired velocity distributions in incompressible potential flow. The method uses an isolated-airfoil, multipoint, inverse code to generate each element of the multielement airfoil and a two-dimensional panel method to analyze the multielement airfoil. Through Newton iteration, the variables associated with the design of the elements in isolation are adjusted to achieve desired multielement velocity… Expand

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#### References

SHOWING 1-10 OF 27 REFERENCES

Multipoint inverse design of an infinite cascade of airfoils

- Mathematics
- 1994

This paper describes a method for the design of an infinite cascade in incompressible flow. The method is based on conformal mapping and does not allow for multipoint design. The cascade blade is to… Expand

Multipoint inverse airfoil design method based on conformal mapping

- Mathematics
- 1991

A method of multipoint inverse airfoil design for incompressible potential flow is presented. Multipoint design is handled by dividing the airfoil into a number of desired segments. For each segment,… Expand

A Potential Flow Design Method for Multicomponent Airfoil Sections

- Computer Science
- 1978

A multicomponent, potential flow design method has been developed to generate an airfoil section with a specified velocity distribution on its surface from an accurate and efficient surface vorticity analysis method. Expand

Potential Flow Analysis of Multielement Airfoils Using Conformal Mapping

- Mathematics
- 1979

Conformal mapping techniques are applied to the problem of calculating the two-dimensional potential flow about multielement airfoils. Airfoil geometry is completely arbitrary and, unlike other… Expand

The theory and design of two-airfoil lifting systems

- Mathematics
- 1977

Abstract By using a general form of conformal mapping from the doubly connected airfoil domain to a canonical ring domain, the problem of two interfering lifting airfoils is reduced to the solution… Expand

Mathematical model for two-dimensional multi-component airfoils in viscous flow.

- Physics
- 1972

A computerized analytical model of a multi-component airfoil in viscous, subsonic flow has been developed. The model, representing attached flow, defines viscous pressure distributions, lift,… Expand

Airfoil design and data

- Engineering
- 1990

This book reflects the author's experience in the development of a computer program for the application of potential flow and boundary layer theories to the design and analysis of subsonic airfoils,… Expand

Generalized multipoint inverse arifoil design

- Mathematics
- 1992

In a rather general sense, inverse airfoil design can be taken to mean the problem of specifying a desired set of airfoil characteristics, such as the airfoil maximum thickness ratio, pitching… Expand

Potential flow about arbitrary biplane wing sections

- Mathematics
- 1937

A rigorous treatment is given of the problem of determining the two-dimensional potential flow around arbitrary biplane cellules. The analysis involves the use of elliptic functions and is… Expand

High-Lift Low Reynolds Number Airfoil Design

- Mathematics
- 1997

A new high-lift airfoil design philosophy has been developed and experimentally validated through wind-tunnel tests. A key element of the high-lift design philosophy was to make use of a concave… Expand