NASA Logo

NTRS

NTRS - NASA Technical Reports Server

Back to Results
Calculation of real-gas effects on blunt-body trim anglesThe effect of vibrational excitation and dissociation at high temperatures on the trim angle of attack of a blunt lifting body is calculated for a nonequilibrium flow regime in air using a CFD technique. The vibrational-electronic temperature and the species densities are calculated assuming the flow to be in a nonequilibrium state. The forebody flow of a two-dimensional blunt body of the shape of the Apollo Command Module at a finite angle of attack is calculated. The results show that the pitching moment around a reference point is larger and the trim angle of attack is smaller for a reacting gas than for a perfect gas. The calculated shift in the trim angle due to the real-gas effect is of the same order as that seen during the Apollo flights.
Document ID
19890041076
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Park, Chul
(NASA Ames Research Center Moffett Field, CA, United States)
Yoon, Seokkwan
(MCAT Institute Moffett Field, CA, United States)
Date Acquired
August 14, 2013
Publication Date
January 1, 1989
Subject Category
Aerodynamics
Report/Patent Number
AIAA PAPER 89-0685
Accession Number
89A28447
Distribution Limits
Public
Copyright
Other

Available Downloads

There are no available downloads for this record.
No Preview Available