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International Journal of Energetic Materials and Chemical Propulsion

Publicado 6 números por año

ISSN Imprimir: 2150-766X

ISSN En Línea: 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

EVALUATING AND TESTING BIOFUELS TO MEET COLD START AND ALTITUDE RELIGHT REQUIREMENTS

Volumen 13, Edición 4, 2014, pp. 319-337
DOI: 10.1615/IntJEnergeticMaterialsChemProp.2014005400
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SINOPSIS

Cold start and altitude relight pose special challenges to the gas turbine combustion system in the operating envelope when using biofuel with different properties. To ensure proper ignition characteristics, the properties for different biofuel blends are compared to Jet A-1 fuel. This investigation reviews proper engine operability and finds the minimum fuel-to-air ratio for these conditions. Also, some features of the combustor aerodynamics are accounted for by considering various differential pressures across the combustor. The relevant variables to simulate altitude relight and cold start are pressure and temperature since they are critical factors to consider for successful ignition. Another significant parameter to consider is the amount of spark energy to ensure ignition of a sufficiently rich mixture. Light-up at altitude is critical because there is a limited window of opportunity. Therefore, a significantly higher fuel-to-air ratio region obtained by delivering enough fuel vapors locally will greatly assist thee ventual start or restart of the engine. The altitude relight facility at Universite Lavalis capable of generating conditions for cold start down to −50° C and relight up to an altitude of 15,240 m (50,000 ft or 50 kft). This rig represents an economical way to simulate these altitude conditions with the use of a steam ejector that can cover a wide pressure range and Mach number. As demonstrated with test results and properties for the various biofuel/Jet A-1 blends, significant improvements were noted for a number of these drop-in biofuel blends because of their higher reactivity as reflected in their higher content of long-chain paraffins.

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