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Spectroscopic Measurements Of The Plume Beneath Counter Burning Solid Propellant Flames
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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 42 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Temperature Profile Measurements in Solid Propellant Flames by : David A. Alspach
Download or read book Temperature Profile Measurements in Solid Propellant Flames written by David A. Alspach and published by . This book was released on 1991 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 1972 with total page 1038 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Book Synopsis Aerosol Measurements in Solid Rocket Propellant Fire Plumes by :
Download or read book Aerosol Measurements in Solid Rocket Propellant Fire Plumes written by and published by . This book was released on 2014 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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.
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1993 with total page 354 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 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 Measurements in Solid Propellant Plumes at Ambient Conditions by :
Download or read book Measurements in Solid Propellant Plumes at Ambient Conditions written by and published by . This book was released on 2011 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Uncertainties in the Characterization of the Thermal Environment of a Solid Rocket Propellant Fire by :
Download or read book Uncertainties in the Characterization of the Thermal Environment of a Solid Rocket Propellant Fire written by and published by . This book was released on 1993 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt: There has been an interest in developing models capable of predicting the response of systems to Minuteman (MM) III third-stage solid propellant fires. Input parameters for such an effort include the boundary conditions that describe the fire temperature, heat flux, emissivity, and propellant burn rate. In this study scanning spectroscopy and pyrometry were used to infer plume temperatures. Each diagnostic system possessed strengths and weaknesses. The intention was to use various supportive methods to infer plume temperature and emissivity, because no one diagnostic had proven capabilities for determining temperature under these conditions. Furthermore, these diagnostics were being used near the limit of their applicability. All these points created some uncertainty in the data collected.
Book Synopsis International Aerospace Abstracts by :
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 682 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Captive-fired Testing of Solid Rocket Motors by : James W. Kordig
Download or read book Captive-fired Testing of Solid Rocket Motors written by James W. Kordig and published by . This book was released on 1971 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Solid Propellant Rocket Research by : Martin Summerfield
Download or read book Solid Propellant Rocket Research written by Martin Summerfield and published by Elsevier. This book was released on 2013-11-11 with total page 713 pages. Available in PDF, EPUB and Kindle. Book excerpt: Solid Propellant Rocket Research
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1980 with total page 982 pages. Available in PDF, EPUB and Kindle. Book excerpt: Sections 1-2. Keyword Index.--Section 3. Personal author index.--Section 4. Corporate author index.-- Section 5. Contract/grant number index, NTIS order/report number index 1-E.--Section 6. NTIS order/report number index F-Z.
Book Synopsis Fundamentals of Solid Propellant Combustion by : K. K. Kuo
Download or read book Fundamentals of Solid Propellant Combustion written by K. K. Kuo and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
