[PDF] Rocket Plume Tomography Of Combustion Species eBook

Author : Joshua M. Kutrieb
Publisher :
Page : 93 pages
File Size : 41,97 MB
Release : 2001-12
Category : Plumes (Fluid dynamics)
ISBN : 9781423524724

GET BOOK

Interest in accurate detection and targeting of aggressor missiles has received considerable interest with the national priority of developing a missile defense system. Understanding the thermal signatures of the exhaust plumes of such missiles is key to accomplishing that mission. Before signature models can be precisely developed for specific rockets, the radiation of the molecular or combustion species within those plumes must be accurately predicted. A combination translation/rotation scanning diagnostic technique has been developed to map the combustion species of a rocket plume and characterize its radiation properties. Using new infrared spectrometer and fiber optic cable technology to transmit the signal spectrum of interest, the custom designed mechanism can sweep through two dimensions of a steady-state rocket exhaust. A glow bar, or blackbody simulator, is shuttered on the opposite side of the plume, allowing the spectrometer to measure both the emission and absorption spectra. This thesis demonstrated the first time use of fiber optic cable to transmit infrared emission/absorption (E/A) spectra from a rocket plume to an infrared detector. This new fiber optic configuration allows for rapid translation and rotation around the rocket plume, establishing the capability for rapid spatial characterization of the combustion species present. Experimental results may then be compared to DoD rocket plume model predictions to highlight areas for improvement.

Author : Johnny Leroy Dowdy
Publisher :
Page : 192 pages
File Size : 16,39 MB
Release : 2004
Category : Flow visualization
ISBN :

GET BOOK

Modifies and optimizes the current Sierra Engineering, Inc., emission-absorption plume diagnostic to a more compact fiber-optic lens system suitable for deployment under realistic rocket test situations.

Author : Frederick S. Simmons
Publisher : AIAA (American Institute of Aeronautics & Astronautics)
Page : 312 pages
File Size : 50,12 MB
Release : 2000
Category : Science
ISBN :

GET BOOK

This new book deals with the phenomenology of rocket exhaust plumes as the targets of space-based surveillance systems. Topics include the physical and chemical processes in rocket engines and their exhaust plumes, particularly in regard to flow properties, gas dynamics, and radiative mechanisms that are responsible for the generation of emission in rocket exhaust plumes at infrared and other wavelengths. System designers in a number of defense-related areas will be able to put the information in this book to immediate use.

Author :
Publisher :
Page : 24 pages
File Size : 13,42 MB
Release : 1984
Category :
ISBN :

GET BOOK

The exhaust plume of a minimum-smoke solid rocket contains significant concentrations of hydrogen and carbon monoxide which when mixed with ambient air react to water and carbon dioxide producing visible flash and increased infrared radiation. Both reactions produce undesirable signatures and interference with optical guidance systems. Potassium salts have been added to propellant charges to inhibit afterburning in both guns and rockets. They have not always been effective, the inhibiting effect of the salt being related to gas composition and temperature in a complex manner which is not completely understood. Further, there is disagreement as to whether it is KOH, KO2, or K that is most important in the afterburning suppression. The results are presented here of the first year of the investigation on the efficacy of each of these on the combustion of diluted H2/CO-O2-N2 mixtures. Potassium added to the fuel-side of a H2-CO-N2-O2 flat diffusion flame at near stoichiometry is more effective in inhibiting the flame reactions than KOH added to a H2-N2-O2 flame at a stoichiometric ratio of 0.61. A description is given of burner, optical and flow metering system used in experiments. Originator supplied keywords include: Rocket plume afterburning, Combustion, and Flame spectroscopy.

Author :
Publisher :
Page : 12 pages
File Size : 40,25 MB
Release : 1980
Category :
ISBN :

GET BOOK

An investigation was performed using model rocket static test engines simulating full scale rocket engine firings with instrumented live animals, heat flux transducers and thermocouples for burn injury assessments. Available data on rocket engine flame temperatures was either extrapolated or computed from chemical compositions and because of the unique 'dirty' characteristics of the flame, it was necessary to devise special instrumentation for direct measurements. A heat flux transducer was fabricated to measure the energy impingent upon the skin surface at various distances from the rocket engine. The transducer was calibrated against a graphite imaging furnace capable of producing 15 cal/sq cm sec, in conjunction with a standard radiation source and radiometer. Radiometric observations were used also to describe precisely the pulse shape of the rocket engine plume. External and intradermal thermocouples measured the actual temperatures experienced in producing a white burn in the rat (equivalent to a second degree burn in the human) and for monitoring each test and correlating one exposure with another. This paper describes the techniques and measurements used, the generation of a time-temperature profile for producing the standard burn effect and provides a temperature history at the level of the burn site.

Author :
Publisher :
Page : 0 pages
File Size : 32,86 MB
Release : 2002
Category :
ISBN :

GET BOOK

The report presents results of experimental and analytical studies of certain energy transfer mechanisms and rates in high-energy gas flows. The immediate application is to generate kinetic data to aid in the prediction of the radiation emitted by hypervelocity vehicle flowfields, radiation from high altitude rocket plumes, how shocks, and shock layers around the vehicles. The present report gives data on a newly discovered vibration-to-electronic (V-E) energy transfer process in CO, creating strong UV signal on the CO 4th Positive Bands. This process has been found to be mediated by small amount of free electrons in the flow. Analogous processes populating radiating excited electronic states of NO, CN, and C2 are also presented. In a complementary phase of the work, production of highly vibrationally excited N2 in cold plasmas and the measurement of vibrational level populations by spontaneous Raman spectroscopy is reported.