vlmd
所属分类:数学计算
开发工具:Fortran
文件大小:299KB
下载次数:101
上传日期:2013-08-24 10:03:34
上 传 者:
905011
说明: 计算低速气动力的涡格法程序,来自NASA,可信度高
(This is a vortex lattice aerodynamic program from the low speed aerodynamics group at NASA Langley)
文件列表:
analysis.f90 (63858, 2005-01-05)
c1.inp (1004, 2004-01-17)
c1.out (234165, 2004-12-07)
c2.inp (1020, 2004-11-05)
c2.out (234165, 2004-12-07)
c3.inp (772, 2004-11-05)
c3.out (177050, 2004-12-07)
c4.inp (1000, 2004-11-05)
c4.out (202549, 2004-12-07)
case1.inp (441, 2013-03-13)
case1.out (234808, 2013-03-12)
case2.inp (441, 2013-03-13)
case2.out (234808, 1996-12-30)
case3.inp (396, 2013-03-13)
case3.out (177509, 1996-12-30)
case4.inp (453, 2013-03-13)
case4.out (203123, 1996-12-30)
geom.f90 (34788, 2008-12-14)
lar15160.txt (3226, 1999-01-08)
read.me (1655, 2005-01-05)
vlmd.txt (1080, 1997-01-01)
input.txt (1103, 2006-01-04)
VORTEX LATTICE MINIMUM DRAG (VLMD) \vlmd\readme.txt
The files for this program are in directory \vlmd on the CD-ROM and in the
archive file vlmd.zip that may be downloaded from the PDAS web site.
readme.txt this file of general information
read.me extra input information supplied by Raj Nangia
input.txt instructions for use of VLMD
geom.for the source code for geometry
geom.exe geometry executable for Windows
geom.lnx geometry executable for Linux
geom.mac geometry executable for Macintosh OS X (Intel)
analysis.for the source code for analysis
analysis.exe analysis executable for Windows
analysis.lnx analysis executable for Linux
analysis.exe analysis executable for Macintosh OS X (Intel)
lar15160.txt the original COSMIC description of the program
Sample cases for this program are:
c1.inp input data for test case 1
c1.out combined output from geom and analysis for this test case.
c2.inp input data for test case 2
c2.out combined output from geom and analysis for this test case.
c3.inp input data for test case 3
c3.out combined output from geom and analysis for this test case.
c4.inp input data for test case 4
c4.out combined output from geom and analysis for this test case.
The reference documents for this program may be accessed
from the web page http://www.pdas.com/vlmdrefs.html.
To compile this program for your computer, use the commands
gfortran geom.f90 -o geom.exe
gfortran analysis.for -o analysis.exe
Linux and Macintosh users may prefer to omit the .exe on the file name.
The geom program asks for the name of the input file. This must be a file
written to conform to the instructions in the NASA TN. Geom produces a file
called geom.out and a specially formatted file called FORT25. This file is
not designed to be read or printed; it is the input to Analysis. When
Analysis is launched, it asks no questions, but takes the file called FORT25
and completes the remainder of the calculations. This produces a file called
analysis.out that is designed to be printed.
DESCRIPTION (FROM NASA)
A new subsonic method has been developed by which the mean camber surface
can be determined for trimmed noncoplanar planforms with minimum vortex
drag. The method uses a vortex lattice and overcomes previous difficulties
with chord loading specification. This method uses a Trefftz plane analysis
to determine the optimum span loading for minimum drag, then solves for the
mean camber surface of the wing, which will provide the required loading.
Pitching-moment or root-bending-moment constraints can be employed as well
at the design lift coefficient.
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