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Solid Propellant Flame Spectroscopy
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Book Synopsis Solid Propellant Flame Spectroscopy by : J. T. Edwards
Download or read book Solid Propellant Flame Spectroscopy written by J. T. Edwards and published by . This book was released on 1988 with total page 229 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the progress made in solid propellant flame chemistry studies. These chemistry studies involved the spectroscopic determination of species concentration and temperature profiles in solid propellant flames at pressures from atmospheric to 7 MPa (1000 psi). The propellants involved contained AP and HMX, as well as several other formulations. The molecules studied were OH, CH, NH, and NO, primarily, although other atomic and molecular species were seen in the propellant flames in emission. The primary diagnostic employed was laser-induced fluorescence (LIF), although the chemiluminescence (emission) from the propellant flames was also studied. These experiments are continuing. Keywords: Models, Combustion diagnostics, Hydrogen oxygen, Carbon, Nitrogen, Chemical radicals. (aw).
Book Synopsis Absorption Spectroscopy Through the Dark Zone of Solid Propellant Flames by : John A. Vanderhoff
Download or read book Absorption Spectroscopy Through the Dark Zone of Solid Propellant Flames written by John A. Vanderhoff and published by . This book was released on 1992 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spatially Resolved Combustion Species and Temperatures of Solid Propellant Flames Using Snapshot Spectroscopy by : Barrie E. Homan
Download or read book Spatially Resolved Combustion Species and Temperatures of Solid Propellant Flames Using Snapshot Spectroscopy written by Barrie E. Homan and published by . This book was released on 1999 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental improvements have been made in the ultraviolet (UV)-visible absorption spectroscopy technique applied to propellant flame diagnostics. The two-dimensional (2-D) feature of an intensified charge-coupled device (ICCD) detector was used to simultaneously record multiple, spatially distinct absorption spectra over a region of 0.35 cm. Temporal resolution has been increased to 1 ms by pulsing a simmering xenon arc lamp. The resulting increase in the light intensity by 30 to 70 times over the nonpulsed output provides the necessary light flux to achieve single-pulse, multiple absorption spectra. Species with low concentrations can be measured with the inclusion of multiple-pass optics to increase the effective path length through the combustion region. Due to broadband UV-visible absorption observed in propellant flame spectra, only 20% of the incident light is typically transmitted. However, inclusion of a calibrated neutral density filter during the measurement of the incident intensity (I0) allows the dynamic range of the detector to be effectively increased by a factor of 5. With these improvements, temperature and OH and NO concentration maps, with 1-ms temporal resolution, have been determined for two different propellant flames.
Book Synopsis Spatially Resolved Combustion Species and Temperatures of Solid Propellant Flames Using Snapshot Spectroscopy by : Barrie E. Homan
Download or read book Spatially Resolved Combustion Species and Temperatures of Solid Propellant Flames Using Snapshot Spectroscopy written by Barrie E. Homan and published by . This book was released on 1999 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Experimental improvements have been made in the ultraviolet (UV)-visible absorption spectroscopy technique applied to propellant flame diagnostics. The two-dimensional (2-D) feature of an intensified charge-coupled device (ICCD) detector was used to simultaneously record multiple, spatially distinct absorption spectra over a region of 0.35 cm. Temporal resolution has been increased to 1 ms by pulsing a simmering xenon arc lamp. The resulting increase in the light intensity by 30 to 70 times over the nonpulsed output provides the necessary light flux to achieve single-pulse, multiple absorption spectra. Species with low concentrations can be measured with the inclusion of multiple-pass optics to increase the effective path length through the combustion region. Due to broadband UV-visible absorption observed in propellant flame spectra, only 20% of the incident light is typically transmitted. However, inclusion of a calibrated neutral density filter during the measurement of the incident intensity (I sub 0) allows the dynamic range of the detector to be effectively increased by a factor of 5. With these improvements, temperature and OH and NO concentration maps, with 1-ms temporal resolution, have been determined for two different propellant flames.
Book Synopsis Absorption Spectra of High-Temperature Solid Propellant Flames by : Richard Michael Gross
Download or read book Absorption Spectra of High-Temperature Solid Propellant Flames written by Richard Michael Gross and published by . This book was released on 1974 with total page 294 pages. Available in PDF, EPUB and Kindle. Book excerpt: A new, high-temperature, infrared radiation source was used in conjunction with a rapid-scanning spectrometer to obtain absorption spectra at an 800 percent rate from composite solid propellant flames during both constant and varying pressure. The propellants studied were AP-HTPB composites. The 3.17 micron H2O, 4.26 micron CO2, and 4.72 micron CO absorption bands were calibrated so that the time-dependent variations in the gas phase concentration of these combustion products could be measured. High-frequency oscillations (200-300Hz) were present even in constant pressure tests and are believed to be associated with inhomogenieties along the optical path length in the flame. During forced oscillation pressure tests at frequencies of 20 to 100 Hz., the composition and temperature of the propellant flame oscillated in phase with the pressure. A study of the variation in the absorption spectra for the major combustion products indicates that prior interpretations of flame emission data during transient pressure conditions were incorrect; however, a principal conclusion of this earlier study was confirmed. Significant gas phase composition variations are produced by pressure changes.
Book Synopsis Nonsteady Burning and Combustion Stability of Solid Propellants by : Martin Summerfield
Download or read book Nonsteady Burning and Combustion Stability of Solid Propellants written by Martin Summerfield and published by AIAA. This book was released on 1992 with total page 922 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solid Propellant Chemistry Combustion and Motor Interior Ballistics 1999 by : Vigor Yang
Download or read book Solid Propellant Chemistry Combustion and Motor Interior Ballistics 1999 written by Vigor Yang and published by AIAA. This book was released on 2000 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spectroscopic Measurements of the Plume Beneath Counter-burning Solid Propellant Flames by : Aren D. Haug
Download or read book Spectroscopic Measurements of the Plume Beneath Counter-burning Solid Propellant Flames written by Aren D. Haug and published by . This book was released on 2014 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: A safety analysis of aluminized solid rocket propellant burning at atmospheric pressure is desired. An attempt is made to simulate propellant levitating above a substrate due to the thrust generated by its plume using a motorized support apparatus. This study investigates the temperatures of the plume and burning aluminum droplets with varying substrates, propellant slug diameters, propellant formulations, and gap heights. Two spectrometers were used to collect broadband and narrowband spectral emissions from the plume underneath and immediately adjacent to the propellant-substrate gap. Spectral data were collected as the apparatus passed horizontally through the gap in order to characterize temperatures as a function of flame depth. The broadband spectra were fitted to a linearized Planck's function to estimate gas temperature for several values of emissivity, while the blue-green narrowband spectra were fitted to aluminum monoxide line strength files to calculate the temperature of the burning aluminum. Results indicate the aluminum monoxide flame temperature is generally hotter than the surrounding plume temperature. Calculated temperatures showed a generally flat trend as a function of depth from the center of the plume. Gas temperatures varied wildly and displayed no clear correlation with test variables. Post-test observations indicate that high-temperature chemical reactions within the substrate, phase changes, and the insulating effect of deposited alumina are likely causes for unpredictability.
Book Synopsis Absorption Spectroscopy Through the Dark Zone of Solid Propellant Flames by : John A. Vanderhoff
Download or read book Absorption Spectroscopy Through the Dark Zone of Solid Propellant Flames written by John A. Vanderhoff and published by . This book was released on 1992 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Analysis of Aluminum Monoxide Emission Spectra in a Simulated Solid Rocket Propellant Flame by :
Download or read book Analysis of Aluminum Monoxide Emission Spectra in a Simulated Solid Rocket Propellant Flame written by and published by . This book was released on 2013 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multichannel Infrared (IR) Absorption Spectroscopy Applied to Solid Propellant Flames by :
Download or read book Multichannel Infrared (IR) Absorption Spectroscopy Applied to Solid Propellant Flames written by and published by . This book was released on 1995 with total page 41 pages. Available in PDF, EPUB and Kindle. Book excerpt: A multichannel infrared (IR) absorption technique has been developed and applied to the study of solid propellant flames. Infrared absorption spectra of HCN, H20, N20, CO, CO2, and CH4 have been obtained through the dark zone of solid propellant flames during steady-state combustion conditions through the use of a 1,O24-element platinum silicide (PtSi) array detector. The experiment consists of a quartz tungsten halogen lamp as the source, a 0.320-m spectrometer with a 75-groove/mm grating, the PtSi array detector, and a windowed strand burner where cylindrical propellant samples are burned cigarette fashion in the presence of nitrogen buffer gas. Experimental results for the nitramine propellants XM39 and M43 and a double-base propellant JA2 are presented, and estimates for the temperature and species concentration are given through the use of the HITRAN database and associated PC programs. Comparisons are made between this work, other published measurements, and thermochemical equilibrium calculations.
Book Synopsis Investigation of High Pressure Solid Propellant Flame Chemistry by : Tim Edwards
Download or read book Investigation of High Pressure Solid Propellant Flame Chemistry written by Tim Edwards and published by . This book was released on 1990 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Flame Spectra of Solid Propellants During Unstable Combustion by : John Lincoln Eisel
Download or read book Flame Spectra of Solid Propellants During Unstable Combustion written by John Lincoln Eisel and published by . This book was released on 1972 with total page 382 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis XX Jornadas de Genética Luso-Españolas by :
Download or read book XX Jornadas de Genética Luso-Españolas written by and published by . This book was released on 1984 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Diagnostics of Solid-propellant Flames Using Fourier Transform Infrared (FTIR) Spectroscopy by : Carl Frank Mallery
Download or read book Diagnostics of Solid-propellant Flames Using Fourier Transform Infrared (FTIR) Spectroscopy written by Carl Frank Mallery and published by . This book was released on 1997 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Study of a Tracer Method for Solid Propellants by : W. Stark
Download or read book Study of a Tracer Method for Solid Propellants written by W. Stark and published by . This book was released on 1962 with total page 1 pages. Available in PDF, EPUB and Kindle. Book excerpt: The feasibility of a spectroscopic method for detection of tracer elements in the exhaust flames of solid propellant rocket engines was investigated. This technique has the possibility of being used to determine burning rates and characteristics of solid propellant grains in operating motors. This is done by relating time of appearance of specific emitted radiation in the exhaust flame with the original position of corresponding tracer salts previously incorporated within the grain. Spectrograph modification and protective measures were required for field monitoring of tracer emission in rocket exhausts of engines operating in an outdoor test installation. Suitable tracers were incorporated into solid propellant grains of two compositions--one aluminized to obtain high flame temperatures and background continuum radiation, the other without aluminum to provide lower temperatures and no background. Feasibility of the method was demonstrated with the detection of tracer emission from the aluminized propellant against the background radiation. (Author).
Book Synopsis Scientific and Technical Aerospace Reports by :
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt:
