Download or read book Retrieval of Flow Field Gas Temperature and Concentration in Low Visibility Propellant Rocket Exhaust Plumes written by and published by . This book was released on 1982 with total page 139 pages. Available in PDF, EPUB and Kindle. Book excerpt: Estimates have been obtained for the maximum loading level of particles in two-phase rocket exhaust plumes that still allows a reliable determination of flow-field temperature and active gas distribution using gas- only plume retrieval diagnostics. Spatial profiles of emission and absorption transverse to the plume axis and close to the nozzle exit plane were computed for various plume models using a single-scattering band model that correctly couples gas and particle radiation. Retrieval of radial gas temperature and concentration profiles from these transverse profiles were performed with an iterative Abel inversion algorithm designed for purely gaseous plumes. The retrieved profiles were compared with the model profiles to determine the error introduced by ignoring particle effects in inversion. A first-order method for accounting for particle effects was also examined. Results are presented for modeled tactical rocket plumes for candidate low-visibility propellants containing Al2O3/H2O, Carbon/HCL and ZrO2/H2O as the particulate/gas pairs.
Download or read book Retrieval of Flow Field Temperature and Concentration of Low Visibility Propellant Rocket Exhaust Plumes written by and published by . This book was released on 1983 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Diagnostic procedures based on iterative Abel inversion have been developed and tested for retrieving both the particle- and gas-phase properties of low-visibility propellant rocket exhaust plumes. The required input data consist of transverse scans of the plume infrared radiance and transmittance at wavelengths in and just outside the gas emission band; data also include transverse scans of angular laser scattering efficiency at the off-band wavelength. From these data, retrieval can be made for the particle volume scattering and volume absorption cross sections, scattering phase function, particle temperature, gas temperature, and gas concentration. The diagnostics are limited to particle loading levels small enough to justify the use of the single-scattering approximation. Example applications are made to three plume models containing Al2O3/H2O, C/HCl, and ZrO2/H2O as the particle and gas phases. For all cases, accurate and unique retrieval of the flow-field properties from exact synthesized transverse data is demonstrated.
Download or read book Technical Abstract Bulletin written by and published by . This book was released on 1982 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Infrared Methods for Gaseous Measurements written by Wormhoudt and published by CRC Press. This book was released on 1985-06-25 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This interdisciplinary volume is an excellent resource for anyone who wants an in-depth understanding of current and emerging trends in gaseous measurement techniques. It provides both qualitative and quantitative introductions to the physics involved in using remote observations to collect data, and offers numerous examples that encourage new applications of existing technologies. Compiled by an authority on spectroscopy, chemical kinetics and infrared emissions from combustible sources, this volume compares burnoff flare and stack plume emission spectra with parametric calculations performed with equally high spectral resolution ... discusses sensitivity of spectra to source temperature, and behavior of emission and absorption linewidths with temperature ... reviews the emission-absorption techniques for determining temperature and species concentration profiles ... and much more. Infrared Methods for Gaseous Measurements is a vital research tool for photo-optical instrumentation engineers; electro-optical engineers; chemical, aerospace, automotive, combustion, environmental, and mechanical engineers; and technologists involved in radiation, infrared or laser research. The book also serves as an excellent resource for graduate molecular spectroscopy courses and postgraduate infrared technology seminars. Book jacket.
Download or read book International Aerospace Abstracts written by and published by . This book was released on 1999 with total page 1032 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Notices of Changes in Classification Distribution and Availability written by and published by . This book was released on 1987 with total page 428 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Announcements Index written by and published by . This book was released on 1986 with total page 980 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Astronautics Aeronautics written by and published by . This book was released on 1981 with total page 832 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Journal of Thermophysics and Heat Transfer written by and published by . This book was released on 1992 with total page 798 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Finding Guide to AIAA Meeting Papers written by American Institute of Aeronautics and Astronautics. Technical Information Service and published by . This book was released on 1981 with total page 764 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Associations Publications in Print written by and published by . This book was released on 1981 with total page 1508 pages. Available in PDF, EPUB and Kindle. Book excerpt: 1981- in 2 v.: v.1, Subject index; v.2, Title index, Publisher/title index, Association name index, Acronym index, Key to publishers' and distributors' abbreviations.
Download or read book Government Reports Annual Index written by and published by . This book was released on 1986 with total page 1074 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Low Altitude Plume Impingement Handbook written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-08 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plume Impingement modeling is required whenever an object immersed in a rocket exhaust plume must survive or remain undamaged within specified limits, due to thermal and pressure environments induced by the plume. At high altitudes inviscid plume models, Monte Carlo techniques along with the Plume Impingement Program can be used to predict reasonably accurate environments since there are usually no strong flowfield/body interactions or atmospheric effects. However, at low altitudes there is plume-atmospheric mixing and potential large flowfield perturbations due to plume-structure interaction. If the impinged surface is large relative to the flowfield and the flowfield is supersonic, the shock near the surface can stand off the surface several exit radii. This results in an effective total pressure that is higher than that which exists in the free plume at the surface. Additionally, in two phase plumes, there can be strong particle-gas interaction in the flowfield immediately ahead of the surface. To date there have been three levels of sophistication that have been used for low altitude plume induced environment predictions. Level 1 calculations rely on empirical characterizations of the flowfield and relatively simple impingement modeling. An example of this technique is described by Piesik. A Level 2 approach consists of characterizing the viscous plume using the SPF/2 code or RAMP2/LAMP and using the Plume Impingement Program to predict the environments. A Level 3 analysis would consist of using a Navier-Stokes code such as the FDNS code to model the flowfield and structure during a single calculation. To date, Level 1 and Level 2 type analyses have been primarily used to perform environment calculations. The recent advances in CFD modeling and computer resources allow Level 2 type analysis to be used for final design studies. Following some background on low altitude impingement, Level 1, 2, and 3 type analysis will be described. Smith, Sheldon D. Unspecified C...
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 488 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.
Download or read book Air Pollution Abstracts written by and published by . This book was released on 1971-05 with total page 658 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Index written by and published by . This book was released on 1973 with total page 1080 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Electric Propulsion written by Dan M. Goebel and published by John Wiley & Sons. This book was released on 2008-12-22 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt: Throughout most of the twentieth century, electric propulsion was considered the technology of the future. Now, the future has arrived. This important new book explains the fundamentals of electric propulsion for spacecraft and describes in detail the physics and characteristics of the two major electric thrusters in use today, ion and Hall thrusters. The authors provide an introduction to plasma physics in order to allow readers to understand the models and derivations used in determining electric thruster performance. They then go on to present detailed explanations of: Thruster principles Ion thruster plasma generators and accelerator grids Hollow cathodes Hall thrusters Ion and Hall thruster plumes Flight ion and Hall thrusters Based largely on research and development performed at the Jet Propulsion Laboratory (JPL) and complemented with scores of tables, figures, homework problems, and references, Fundamentals of Electric Propulsion: Ion and Hall Thrusters is an indispensable textbook for advanced undergraduate and graduate students who are preparing to enter the aerospace industry. It also serves as an equally valuable resource for professional engineers already at work in the field.
