Download or read book Development of a Laser induced Fluorescence System for Application to Rocket Plumes written by C. W. Brasier and published by . This book was released on 1993 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of a Laser Induced Fluorescence System for Application to Rocket Plumes written by and published by . This book was released on 1993 with total page 47 pages. Available in PDF, EPUB and Kindle. Book excerpt: The status of a continuous wave scanning ring-dye laser-induced fluorescence system is presented. This system has been developed for measurements of velocity, temperature, pressure, and specie concentration in high-speed, high-temperature gas flows. Basic principles of laser-induced fluorescence of the sodium atom are discussed. Results of laboratory studies on a sodium vapor cell are presented. Application of this system to three full- scale liquid-propellant rocket engines is discussed, and initial results are presented.
Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on 1995 with total page 380 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 Application of Laser Induced Fluorescence LIF to Liquid Propellant Rocket Engine Testing written by C. Brasier and published by . This book was released on 1997 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Combustion exhausts present a challenging problem for researchers due to the extremely harsh environment, and nonintrusive diagnostics are often sought to provide flow property information. Laser induced fluorescence (LIF) is one technique in which a chosen flow molecule or marker is probed to yield gross flow properties, such as static temperature and flow velocities. The work presented herein describes the application of LIF to the combustion exhausts of several full-scale liquid-propellant rocket engines spanning a wide range of operational parameters. The method is based upon the use of CW ring-dye lasers which scan in frequency over either the Na D1 or D2 line at 5896 and 5890 A. Na is used as a basis for this approach since it occurs as a trace element in both hydrogen and amine rocket fuels. The generic apparatus is described, including a discussion of the collection and interpretation of the LIF signal to yield radial and temporal profiles of radial flow velocity, static temperature, and fuel distribution. It was found that the LIF technique provides quality data in most cases. Certain stressing situations were also found in which data on the flow properties were not obtainable. Also, computational fluid dynamics (CFD) modeling of the plumes was used to provide baseline estimates of the exhaust flow properties. The model reasonably predicted the gross behavior of the flow as determined by the LIF technique, although some items of fine spatial structure were not reproduced very well.
Download or read book 32nd AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit written by and published by . This book was released on 1996 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Induced Fluorescence Measurements of OMS and LR91 Amine Rocket Exhausts written by C. Brasier and published by . This book was released on 1997 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt: Nonintrusive diagnostics are often sought to provide information on combustion exhaust flows due to the harsh environment of the flow. Laser-induced fluorescence (LIF) is one technique in which a chosen flow molecule or marker is probed to yield gross flow properties such as static temperature and flow velocities. The work presented herein describes application of LIF to the combustion exhausts of two full-scale liquid-propellant rocket engines, i.e., the Space Shuttle Orbital Maneuvering System (OMS) and the Titan second-stage LR91 rocket engines, as they undergo routine testing in simulated altitude test cells. The method is based upon the use of CW ring-dye lasers which scan in frequency over either the Na D1 or D2 line at 5896 and 5890 L'. Na is used as a basis for this approach since it occurs as a trace element in both hydrogen and amine rocket fuels. The generic apparatus is described, including a discussion of the collection and interpretation of the LIF signal to yield radial and temporal profiles of radial flow velocity and static temperature. CFD modeling of the plumes was used to provide baseline estimates of the exhaust flow properties. It was found that the CFD model does a fairly good job of predicting the gross behavior of the flow, although some items of fine spatial structure are not reproduced well. The OMS and LR91 rocket engine nozzles are drastically different in construction and cooling method. It was found that excellent LIF results were obtained with the radiation-cooled nozzle (OMS), while the fuel-film cooling (FFC) used for the LR91 nozzle generated an optically thick and particle-laden region which severely impeded the determination of static temperature from the Na LIF measurements. Ancillary optical scattering measurements were made on the LR91 which indicated the existence of an annulus of particles in the flow periphery.
Download or read book Development Analysis and Application of Laser induced Fluorescence and Rayleigh Scattering Measurement Systems in a Hypersonic Wind Tunnel written by Charles Tyler and published by . This book was released on 1996 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Planar Laser Induced Fluorescence for Fuel written by D. A. Greenhalgh and published by . This book was released on 1998 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Development and Application of Laser induced Fluorescence for the Study of Magnetically Confined Plasmas written by Warren Wright and published by . This book was released on 1989 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Induced Fluorescence to Study Power Plant Plume Chemistry written by Douglas Dale Davis and published by . This book was released on 1977 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development and Application of a Photofragmentation laser induced Fluorescence Detection System for Atmospheric Nitrous Acid written by Michael Owen Rodgers and published by . This book was released on 1987 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser induced Fluorescence Measurements of Dual Plumes and Comparison of Laser induced Fluorescence and Conductivity Probe Measurements written by Joseph Coleman Chrzan and published by . This book was released on 2012 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The laser-induced fluorescence (LIF) technique is used to visualize and quantify the concentration field around a conductivity probe. The LIF data are compared to the signal collected by the conductivity probe. The objective is to compare the signal of the contact-sensor to the "ground-truth" measurement of the LIF data. Detailed comparison of the temporal response and the peak detection are presented. In addition, a proof-of-concept of a two-color LIF technique is presented using Rhodamine 6G paired with an Argon-ion laser and simultaneously Oxazine 725 paired with a Krypton-ion laser. Optical filters on two digital cameras isolate the emitted light from these respective laser/dye combinations. The objective is to provide detailed quantitation of two over-lapping (non-reactive)chemical plumes.
Download or read book Laser induced Fluorescence Measurements of a Two stage Electrothermal Thruster Plume written by Vincent P. Chiravalle and published by . This book was released on 2003 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NASA Technical Memorandum written by and published by . This book was released on 1994 with total page 492 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Government Reports Annual Index written by and published by . This book was released on 1993 with total page 1836 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser induced Fluorescence Measurement of Ion Velocities in the Plume of a Hall Effect Thruster written by George J. Williams and published by . This book was released on 1999 with total page 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 1993 with total page 528 pages. Available in PDF, EPUB and Kindle. Book excerpt:
