Name: Spectroscopic Diagnostics and an Arc Jet Heated Air Plasma (en Inglés)
Price: 87.79 USD
Availability: InStock
Author: National Aeronautics and Space Administr ; Mack, Larry Howard
ISBN: 9781288910137

portada Spectroscopic Diagnostics and an Arc Jet Heated Air Plasma (en Inglés)

Formato

Libro Físico

Autor

National Aeronautics and Space Administr

Larry Howard Mack

Editorial

Biblioscholar

Idioma

Inglés

N° páginas

Encuadernación

Tapa Blanda

Dimensiones

24.6 x 18.9 x 0.4 cm

Peso

0.15 kg.

ISBN13

9781288910137

Categorías

Educación

Spectroscopic Diagnostics and an Arc Jet Heated Air Plasma (en Inglés)

National Aeronautics and Space Administr (Autor) · Larry Howard Mack (Autor) · Biblioscholar · Tapa Blanda

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Origen: Estados Unidos (Costos de importación incluídos en el precio)

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Reseña del libro "Spectroscopic Diagnostics and an Arc Jet Heated Air Plasma (en Inglés)"

Spectral radiation measurements were made in the range of 200 to 900 nm across a section of the plenum of an arc jet wind tunnel using a series of optical fibers. The spectra contained line radiation from Oxygen and Nitrogen atoms and molecular radiation from N2(+), N2, and NO. Abel inversion technique is used to obtain radial distribution of the spectra. The analysis yielded radial profiles of the electronic excitation, vibrational and rotational temperatures of the flow field. Spectral fitting yielded branching ratios for different vibrational and rotational bands. Relatively mild flow conditions, i.e. enthalpy and mass flow rate, were used for prolonged measurements of up to and over two hours to establish the best experimental methods of temperature determinations. Signal to noise was improved by at least an order of magnitude enabling the molecular vibrational band heads of N2(+) (first negative system), N2 (second positive system), and NO (beta, gamma, delta, and epsilon systems) to be resolved in the lower ultraviolet wavelength regions. The increased signal to noise ratio also enabled partial resolution of the rotational lines of N2(+) and N2 in certain regions of minimal overlap. Comparison of the spectra with theoretical models such as the NEQAIR2 code are presented and show potential for fitting the spectra when reliable calibration is performed for the complete wavelength range.