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Absorption Spectra Of High Temperature Solid Propellant Flames
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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 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 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 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 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 702 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 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 Heat Transfer in Fire and Combustion Systems by : A. Murty Kanury
Download or read book Heat Transfer in Fire and Combustion Systems written by A. Murty Kanury and published by . This book was released on 1992 with total page 220 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1970 with total page 1532 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Applied Mechanics Reviews written by and published by . This book was released on 1981 with total page 960 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.
Download or read book Air Force Research Resumés written by and published by . This book was released on with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Progress in Astronautics and Aeronautics by :
Download or read book Progress in Astronautics and Aeronautics written by and published by . This book was released on 1963 with total page 924 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1967 with total page 848 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis U.S. Government Research & Development Reports by :
Download or read book U.S. Government Research & Development Reports written by and published by . This book was released on 1966-11 with total page 1014 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 Journal of Thermophysics and Heat Transfer by :
Download or read book Journal of Thermophysics and Heat Transfer written by and published by . This book was released on 2004 with total page 1238 pages. Available in PDF, EPUB and Kindle. Book excerpt: This journal is devoted to the advancement of the science and technology of thermophysics and heat transfer through the dissemination of original research papers disclosing new technical knowledge and exploratory developments and applications based on new knowledge. It publishes papers that deal with the properties and mechanisms involved in thermal energy transfer and storage in gases, liquids, and solids or combinations thereof. These studies include conductive, convective, and radiative modes alone or in combination and the effects of the environment.
