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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

A NUMERICAL SIMULATION OF A PULSE DETONATION ENGINE WITH HYDROGEN FUELS

Volume 5, Edição 1-6, 2002, pp. 662-672
DOI: 10.1615/IntJEnergeticMaterialsChemProp.v5.i1-6.690
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RESUMO

The present computational study explores some issues concerning the operational performance of Pulse Detonation Engines (PDE) with hydrogen/oxygen propellants. One- and two-dimensional, transient CFD calculations are employed assuming finite-rate chemical kinetic approximations for hydrogen/oxygen combustion based upon eight chemical species and 16 reactions. The CFD model was applied to compute the physical attributes of various global detonation phenomena including shock speed, pressure spike behaviors, and Chapman-Jouquet detonation conditions. Methods for ensuring detonation initiation in the computations by means of a specified high-pressure shock initiation region are also examined. To provide insight into the numerical detonation initiation process, the details of initiation at closed and open ends are contrasted. The open-end initiation results help to verify the computational methodology and to gain additional insight into the behavior of the closed-end solutions. The effects of reducing ambient pressure at the exit of the cylinder for multicycle operations are investigated. The results indicate that at sufficiently low ambient pressures the flow conditions at the exit of the open-ended cylinder remain choked throughout the entire cycle except during refueling. Two-dimensional calculations were performed to study potential pre-combustion effects due to cyclic refueling processes in the engine. Results indicate that elevated chamber wall temperatures (approximately 1500 K) simulating multiple cycle heating produce some reactions near the wall without predetonation during refueling process. Overall, one-dimensional and two-dimensional approximations are in close agreement. Thrust and specific impulse are computed for a variety of conditions to give an indication of potential performance of a PDE.

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