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Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology

Aviation gasoline contains tetraethyl lead to aid on knocking in spark-ignited aircraft engines. Tetraethyl lead in aviation gasoline is the cause of severe health effects and is considered as human carcinogenic compound. Piston aviation fuels initiative evaluated 245 unleaded fuels, but none could...

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Main Authors: Kumar, T., Mohsin, R., Majid, Z. A., Ghafir, M. F. A., Wash, A. M.
Format: Article
Published: Elsevier Ltd. 2020
Subjects:
TP Chemical technology
Online Access:http://eprints.utm.my/id/eprint/86430/
https://dx.doi.org/10.1016/j.apenergy.2019.114150
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spelling my.utm.864302020-09-09T07:09:48Z http://eprints.utm.my/id/eprint/86430/ Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology Kumar, T. Mohsin, R. Majid, Z. A. Ghafir, M. F. A. Wash, A. M. TP Chemical technology Aviation gasoline contains tetraethyl lead to aid on knocking in spark-ignited aircraft engines. Tetraethyl lead in aviation gasoline is the cause of severe health effects and is considered as human carcinogenic compound. Piston aviation fuels initiative evaluated 245 unleaded fuels, but none could match all the performance regulations of aviation gasoline. In this study, optimisation of the knock-limited performance of 83 leaded/unleaded/blends was carried out. The input parameters were the fuels and engine speed. The output parameters were knock-limited data of brake horsepower, torque, brake mean effective pressure, brake specific fuel consumption and average air-to-fuel ratio. The engine speed was varied at 2350–2700 and the fuels were varied at eighty-three levels. The design matrix was selected based on one factor of response surface methodology which contained 581 experimental runs. Analysis of variance was performed on the models to validate the robustness of the model tested. Engine speed, type of fuel and average air-to-fuel ratio were set to be in range while brake horsepower, torque and brake mean effective pressure were maximised and brake specific fuel consumption was minimised. Confirmation test was carried out to validate the predicted and actual outcomes. Results indicated that when the engine was run with a speed of 2700 RPM, RSM AVGAS 100LL MS gave optimum solution with corresponding brake horsepower, torque, brake mean effective pressure, brake specific fuel consumption and average air-to-fuel ratio values of 292.837 Hp, 777.557 Nm, 1099.521 kPa, 0.271 kg/kW h and 13.044 respectively with a desirability of 0.972. The results indicated future focus of similar research into optimization of mid and low octane unleaded alternatives. Elsevier Ltd. 2020-02 Article PeerReviewed Kumar, T. and Mohsin, R. and Majid, Z. A. and Ghafir, M. F. A. and Wash, A. M. (2020) Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology. Applied Energy, 259 . ISSN 0306-2619 https://dx.doi.org/10.1016/j.apenergy.2019.114150 DOI:10.1016/j.apenergy.2019.114150
institution Universiti Teknologi Malaysia
building UTM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Teknologi Malaysia
content_source UTM Institutional Repository
url_provider http://eprints.utm.my/
topic TP Chemical technology
spellingShingle TP Chemical technology
Kumar, T.
Mohsin, R.
Majid, Z. A.
Ghafir, M. F. A.
Wash, A. M.
Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology
description Aviation gasoline contains tetraethyl lead to aid on knocking in spark-ignited aircraft engines. Tetraethyl lead in aviation gasoline is the cause of severe health effects and is considered as human carcinogenic compound. Piston aviation fuels initiative evaluated 245 unleaded fuels, but none could match all the performance regulations of aviation gasoline. In this study, optimisation of the knock-limited performance of 83 leaded/unleaded/blends was carried out. The input parameters were the fuels and engine speed. The output parameters were knock-limited data of brake horsepower, torque, brake mean effective pressure, brake specific fuel consumption and average air-to-fuel ratio. The engine speed was varied at 2350–2700 and the fuels were varied at eighty-three levels. The design matrix was selected based on one factor of response surface methodology which contained 581 experimental runs. Analysis of variance was performed on the models to validate the robustness of the model tested. Engine speed, type of fuel and average air-to-fuel ratio were set to be in range while brake horsepower, torque and brake mean effective pressure were maximised and brake specific fuel consumption was minimised. Confirmation test was carried out to validate the predicted and actual outcomes. Results indicated that when the engine was run with a speed of 2700 RPM, RSM AVGAS 100LL MS gave optimum solution with corresponding brake horsepower, torque, brake mean effective pressure, brake specific fuel consumption and average air-to-fuel ratio values of 292.837 Hp, 777.557 Nm, 1099.521 kPa, 0.271 kg/kW h and 13.044 respectively with a desirability of 0.972. The results indicated future focus of similar research into optimization of mid and low octane unleaded alternatives.
format Article
author Kumar, T.
Mohsin, R.
Majid, Z. A.
Ghafir, M. F. A.
Wash, A. M.
author_facet Kumar, T.
Mohsin, R.
Majid, Z. A.
Ghafir, M. F. A.
Wash, A. M.
author_sort Kumar, T.
title Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology
title_short Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology
title_full Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology
title_fullStr Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology
title_full_unstemmed Experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology
title_sort experimental study of the anti-knock efficiency of high-octane fuels in spark ignited aircraft engine using response surface methodology
publisher Elsevier Ltd.
publishDate 2020
url http://eprints.utm.my/id/eprint/86430/
https://dx.doi.org/10.1016/j.apenergy.2019.114150
_version_ 1677781176774819840
score 13.211869

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