Download or read book Laser induced Fluorescence of Atomic Hydrogen in an Arcjet Thruster written by J. G. Liebeskind and published by . This book was released on 1992 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Laser Induced Fluorescence of Ground State Hydrogen Atoms in an Arcjet Plume written by and published by . This book was released on 1995 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: We report two photon laser induced fluorescence measurements near the nozzle exit and in the plume of a 1 kW arcjet thruster. Atomic hydrogen number densities, axial and radial velocities, and translational temperatures are measured in the expansion plume of a 1 kW arcjet operating on hydrogen propellant. Data from recent computational models are compared with the atomic hydrogen density measurements.
Download or read book Multiphoton Laser Induced Fluorescence for Measuring Point Specific Densities of Ground State Atomic Hydrogen in an Arcjet Plume written by Jeffrey Alan Pobst and published by . This book was released on 1997 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Development of Optical Diagnostics for Performance Evaluation of Arcjet Thrusters written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-07-06 with total page 92 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laser and optical emission-based measurements have been developed and implemented for use on low-power hydrogen arcjet thrusters and xenon-propelled electric thrusters. In the case of low power hydrogen arcjets, these laser induce fluorescence measurements constitute the first complete set of data that characterize the velocity and temperature field of such a device. The research performed under the auspices of this NASA grant includes laser-based measurements of atomic hydrogen velocity and translational temperature, ultraviolet absorption measurements of ground state atomic hydrogen, Raman scattering measurements of the electronic ground state of molecular hydrogen, and optical emission based measurements of electronically excited atomic hydrogen, electron number density, and electron temperature. In addition, we have developed a collisional-radiative model of atomic hydrogen for use in conjunction with magnetohydrodynamic models to predict the plasma radiative spectrum, and near-electrode plasma models to better understand current transfer from the electrodes to the plasma. In the final year of the grant, a new program aimed at developing diagnostics for xenon plasma thrusters was initiated, and results on the use of diode lasers for interrogating Hall accelerator plasmas has been presented at recent conferences. Cappelli, Mark A. Unspecified Center...
Download or read book Basic Research in Electric Propulsion Part I Pulsed Plasma Thruster Propellant Efficiency and Contamination Part II Arcjet Remote Plume Measurement and Hydrogen Density written by and published by . This book was released on 2002 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pulsed Plasma Thrusters (PPT) have been the major technology under investigation for the Small Satellite Electric Propulsion Thruster Research program. Arcjet technology is also under investigation with Electric Propulsion Space Experiment Optical Signature experiments underway and Multiphoton Laser Induced Fluorescence Measurements of Ground State Atomic Hydrogen have been performed in an arcjet plume. At present PPTs are being tested in the laboratory environment with investigations under way to determine exact inefficiency mechanisms that can be corrected. This work has already identified previously unknown physical behavior in the PPT. The Electric Propulsion Space Experiment is a flight demonstration of a 30 kW ammonia arcjet propulsion system. Optical measurements of the arcjet plume were performed using on-board optical equipment ground observatories and other space platforms. Low power arcjet technology provided definitive work on atomic species plume concentrations in low power hydrogen arcjet plumes. This work applied a flame diagnostic Multiphoton Laser Induced Fluorescence to the excited-state plasma environment to investigate concentration levels of atomic ground-state hydrogen.
Download or read book New Trends in Instrumentation for Hypersonic Research written by Alain Boutier and published by Springer Science & Business Media. This book was released on 1993 with total page 642 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bringing together most of the expertise available throughout the world on the instrumentation for the characterization of hypersonic flows, this work reviews fundamental requirements and points out the necessity for low uncertainties, especially for code validation and the assessment of real gas effects.
Download or read book Laser induced Fluorescence Measurements Within an Arcjet Thruster Nozzle written by P. Victor Storm and published by . This book was released on 1995 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book ARO and AFOSR Contractors Meeting in Chemical Propulsion Held in Virginia Beach Virginia on 3 6 June 1996 written by David M. Mann and published by . This book was released on 1996 with total page 302 pages. Available in PDF, EPUB and Kindle. Book excerpt: Partial contents: Supercritical droplet behavior; Fundamentals of acoustic instabilities in liquid-propellant rockets; Modeling liquid jet atomization proceses; Liquid-propellant droplets dynamics and combustions in supercritical forced convective environments; Contributions of shear coaxial injectors to liquid rocket motor combustion instabilities; High pressure combustion studies under combustion driven oscillatory flow conditions; Droplet collision on liquid propellant combustion; Combustion and plumes; Development of a collisional radiative emission model for strongly nonequilibrium flows; Energy transfer processes in the production of excited states in reacting rocket flows; modeling nonequilibrium radiation in high altitude plumes; kinetics of plume radiation, and of HEDMs and metallic fuels combustion; Nonsteady combustion mechanisms of advanced solid propellants; Chemical mechanisms at the burning surface. p15
Download or read book Interference Free Laser Induced Fluorescence Imaging of Atomic Hydrogen in Flames written by and published by . This book was released on 2007 with total page 3 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Diagnostics Development of Plasma Thrusters Comprehensive Investigation of Low Power Arcjet Operation written by and published by . This book was released on 1998 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Two experimental diagnostic techniques were developed and applied to plume measurements of low power (1 kW class) hydrogen arcjets. The outstanding experimental problem of measurement of plume species density was addressed using two photon, laser induced fluorescence. Current modulation velocimetry was applied to the study of plume velocity fluctuations and it was found that they exhibited no correlation with the supply current ripple and appeared to be random.
Download or read book A Numerical Model of Laser Induced Fluorescence in a Hydrogen Plasma written by Marc R. Hallada and published by . This book was released on 1990 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 526 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 AIAA SAE ASME ASEE 27th Joint Propulsion Conference 91 2101 91 2149 written by and published by . This book was released on 1991 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Deconvolution of Ion Velocity Distributions from Laser induced Fluorescence Spectra of Xenon Electrostatic Thruster Plumes written by Timothy B. Smith and published by . This book was released on 2003 with total page 614 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book 34th AIAA ASME SAE ASEE Joint Propulsion Conference Exhibit written by and published by . This book was released on 1998 with total page 578 pages. Available in PDF, EPUB and Kindle. Book excerpt:
