Computer program which determines the mean camber surface required to support a given set of loadings on a composite wing in subsonic compressible flow has been developed

Lamar, J. E.

English

NASA Technical Reports Server

December 1968
	 Brief 68-10446 
NASA TECH BRIEF 
NASA Tech Briefs are issued to summarize specific innovations derived from the U.S. space program, 
to encourage their commercial application. Copies are available to the public at 15 cents each 
from the Clearinghouse for Federal Scientific and Technical Information, Springfield, Virginia 22151. 
Modified Multhopp Mean Camber Computer Program 
.
The problem: 
In the process of wing design, it is often necessary 
to determine for a given planform the mean camber 
surface when the load distribution is known. Since 
the planforms now being considered for use can be of 
a composite arrangement, lengthy mathematical cal-
culations are required in order to obtain a solution 
for each wing. Therefore, a computer program was 
needed to perform these computations. 
The solution: 
A computer program which determines the mean 
camber surface required to support a given set of 
loadings on a composite wing in subsonic compres-
sible flow. 
How it's done: 
The program uses the basic theoretical method of 
Multhopp but extends it to predict the mean camber 
surface. This method is based on steady, linearized, 
potential, incompressible flow where the effects of 
compressibility are accounted for by use of the 
Prandtl-Glauert correction factor. The mean camber 
surface is found by integrating the local chord slopes,
found by the matrix product of the prescribed loading 
distribution and the aerodynamic influence coef-
ficients, from the trailing edge forward to specified 
points along the chord. This is done at each of several 
spanwise stations. 
Notes: 
I. This program is written in CDC Fortran for use on 
the CDC 6000 series computers with the Scope 2.0 
operating systems and library tape. 
2. Inquiries concerning this program may be directed 
to:
COSMIC 
Computer Center 
University of Georgia 
Athens, Georgia 30601 
Reference: B68-10446 
Patent status:	 - 
No patent action is contemplated by NASA. 
Source: John E. Lamar 
Langley Research Center 
(LAR-10376) 
Category 06 
Now
This document was prepared under the sponsorship of the National 	 Government assumes any liability resulting from the use of the 
Aeronautics and Space Administration. Neither the United States	 information contained in this document, or warrants that such use 
Government nor any person acting on behalf of the United States	 will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19680000444 2020-03-12T05:59:40+00:00Z


Modified Multhopp mean camber computer program

Abstract

Similar works

Full text

Available Versions

NASA Technical Reports Server