Inscrição na biblioteca: Guest
International Journal of Energetic Materials and Chemical Propulsion

Publicou 6 edições por ano

ISSN Imprimir: 2150-766X

ISSN On-line: 2150-7678

The Impact Factor measures the average number of citations received in a particular year by papers published in the journal during the two preceding years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) IF: 0.7 To calculate the five year Impact Factor, citations are counted in 2017 to the previous five years and divided by the source items published in the previous five years. 2017 Journal Citation Reports (Clarivate Analytics, 2018) 5-Year IF: 0.7 The Immediacy Index is the average number of times an article is cited in the year it is published. The journal Immediacy Index indicates how quickly articles in a journal are cited. Immediacy Index: 0.1 The Eigenfactor score, developed by Jevin West and Carl Bergstrom at the University of Washington, is a rating of the total importance of a scientific journal. Journals are rated according to the number of incoming citations, with citations from highly ranked journals weighted to make a larger contribution to the eigenfactor than those from poorly ranked journals. Eigenfactor: 0.00016 The Journal Citation Indicator (JCI) is a single measurement of the field-normalized citation impact of journals in the Web of Science Core Collection across disciplines. The key words here are that the metric is normalized and cross-disciplinary. JCI: 0.18 SJR: 0.313 SNIP: 0.6 CiteScore™:: 1.6 H-Index: 16

Indexed in

COMPOSITE PROPELLANT EXTINCTION BY LASER ENERGY PULSE

Volume 4, Edição 1-6, 1997, pp. 962-971
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v4.i1-6.890
Get accessGet access

RESUMO

Knowledge of the dynamic response characteristics of burning propellants to the variation of external parameters permits an evaluation of their capability to reach, through a combustion transient, the steady-state burning regime. In this experimental study, a transient combustion event is induced by employing externally incident laser radiation. The objective is to determine propellant extinction characteristics and its dependency on the working pressure. Fast deradiation of the burning propellant surface is utilized to achieve propellant extinction, because only the combustion process itself is perturbed; the flow field in the combustion chamber is unaffected. Tests were carried out using an AP/HTPB (86/14) propellant and a CO2 laser system, whereas laser Doppler velocimetry was used to measure the velocity of product gases from the burning propellant. Further qualitative information was obtained by a photodiode which collected light emitted by the burning surface and flame. Results of tests performed over pressures ranging from 12 to 50 kPa indicate that the transient propellant behavior upon deradiation depends on the laser pulse duration and that burning propellant extinction was achieved only if the form of the laser pulse was properly chosen. Two final solutions were found after laser cut off: continuous burning or extinction defining, for any working pressure, the curves separating the distinct burning propellant response. These boundary limits were drawn for different pressure values: 12, 15, 20 and 30 kPa.

Portal Digital Begell Biblioteca digital da Begell eBooks Diários Referências e Anais Coleções de pesquisa Políticas de preços e assinaturas Begell House Contato Language English 中文 Русский Português German French Spain