| Téléchargement | - Voir la version finale : Evaluation of ASTM D6424 standard for knock analysis using unleaded fuel candidates on a six cylinder aircraft engine (PDF, 2.8 Mio)
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| DOI | Trouver le DOI : https://doi.org/10.1177/14680874211008703 |
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| Auteur | Rechercher : Ebrahimi, Khashayar; Rechercher : Gordon, DavidIdentifiant ORCID : https://orcid.org/0000-0002-7999-8234; Rechercher : Canteenwalla, Pervez1; Rechercher : Koch, Charles R.Identifiant ORCID : https://orcid.org/0000-0002-6094-5933 |
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| Affiliation | - Conseil national de recherches du Canada. Aérospatiale
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| Bailleur de fonds | Rechercher : National Research Council of Canada; Rechercher : Transport Canada; Rechercher : Mitacs; Rechercher : Canadian Owners and Pilots Association; Rechercher : Environment and Climate Change Canada |
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| Format | Texte, Article |
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| Sujet | aircraft piston engine; knock; knock indexes; ASTM D6424; unleaded fuel candidates |
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| Résumé | The ASTM D6424 standard is used for general aviation piston engine knock detection and is tested for unleaded fuel candidates. Issues are discussed regarding the identification of knocking cycles, filtering frequency bands, and the effects of down-sampling for this knock detection technique. The knock tests were performed on the Continental TSIO-520-VB engine at 12,000 ft for take-off and cruise conditions using three different fuels, the standard leaded 100LL avgas and two unleaded fuel candidates. The ASTM D6424 knock detection method has its own particular disadvantages, which are detailed and compared to other knock detection methods including the third derivative of pressure signal and discrete wavelet transform. Updates to the standard include a minimum sampling rate of 0.2 CAD. Additionally, the current standard does not contain recommendations for filtering the cylinder pressure which results in over detection of knocking cycles with the two new aviation fuel candidates tested. Recommendations are provided regarding the pressure signal processing prior to ASTM D6424 knock-characterization. |
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| Date de publication | 2021-04-08 |
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| Maison d’édition | SAGE Publications |
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| Licence | |
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| Dans | |
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| Langue | anglais |
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| Publications évaluées par des pairs | Oui |
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| Exporter la notice | Exporter en format RIS |
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| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
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| Identificateur de l’enregistrement | 658dc31e-ed91-4107-9316-c7f9f9821e3e |
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| Enregistrement créé | 2023-11-16 |
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| Enregistrement modifié | 2023-11-16 |
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