Infrared spectroradiometer measures high-resolution spectral absorption, emission, temperature, and concentration of chemical species in radically symmetric zones of the exhaust plumes of large rocket engines undergoing static firing tests. Measurements are made along predetermined lines of sight through the plume

Herget, W. F.

English

NASA Technical Reports Server

May 1968	 Brief 68-10081 
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. 
Infrared Spectroradiometer for Rocket Exhaust Analysis 
A spectro radiometer system has been developed to 
perform high-resolution spectral absorption and 
emission measurements along predetermined lines of 
sight through the exhaust plumes of large rocket 
engines undergoing static firing tests. The measure-
ments provide temperature and concentration profiles 
of specific chemical species in radially symmetric 
zones of an exhaust plume delineated by the directed 
lines of sight. 
The system consists of an internal blackbody cali-
bration source, external radiation sources for absorp-
tion measurements, spectral and spatial scanning 
mechanisms, power supplies, and recording equip-
ment. All components used during engine firings, with 
the exception of the power supplies and recording 
equipment, can be operated in a vacuum environment. 
This arrangement permits the study of exhausts from 
engines operated in altitude simulation chambers. 
The spectroradio meter is equipped to. operate in 
the 0.8- to 3.5-micron spectral range, with one channel 
of low spectral resolution and one channel having the 
moderately high resolution afforded by a quarter-
meter grating monochromator. Additional gratings
and detectors can extend the spectral range of the 
instrument through the visible and ultraviolet to 0.3 
micron or further into the infrared. 
Notes: 
I. This instrument should be of interest to experi-
mentalists concerned with the zonal analysis of 
spectral absorption, emission, temperature, and 
concentration of chemical species associated with 
gaseous combustion products and spatially re-
solved plasmas. 
. Inquiries concerning this instrument may be di-
rected to:
Technology Utilization Officer 
Marshall Space Flight Center 
Huntsville, Alabama 35812 
Reference: B68-10081 
Patent status: 
No patent action is contemplated by NASA. 
Source: W. F. Herget 
of North American Rockwell Corporation 
under contract to 
Marshall Space Flight Center 
(M FS-l4357) 
Category 02 
Am
This document was prepared under the sponsorship of the National 
Aeronautics and Space Administration. Neither the United States 
Government nor any person acting on behalf of the United States
Government assumes any liability resulting from the use of the 
information contained in this document, or warrants that such use 
will be free from privately owned rights.
https://ntrs.nasa.gov/search.jsp?R=19680000081 2020-03-12T05:48:45+00:00Z


Infrared spectroradiometer for rocket exhaust analysis

Abstract

Similar works

Full text

Available Versions

NASA Technical Reports Server