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Experimental and numerical aerodynamic investigation of a prototype vehicle
Akansu, Selahaddin Orhan,Akansu, Yahya Erkan,Dagdevir, Toygun,Daldaban, Ferhat,Yavas, Feridun Techno-Press 2015 Wind and Structures, An International Journal (WAS Vol.20 No.6
This study presents experimental and numerical aerodynamic investigation of a prototype vehicle. Aerodynamics forces examined which exerted on a prototype. This experimental study was implemented in a wind tunnel for the Reynolds number between $10^5-3.1{\times}10^5$. Numerical aerodynamic analysis of the vehicle is conducted for different Reynolds number by using FLUENT CFD software, with the k-$\varepsilon$ realizable turbulence model. The studied model aims at verifying the aerodynamic forces between experimental and numerical results. After the Reynolds number of $2.8{\times}10^5$, the drag coefficient obtained experimentally becomes independent of Reynolds number and has a value of 0.25.
Experimental and numerical aerodynamic investigation of a prototype vehicle
Selahaddin Orhan Akansu,Yahya Erkan Akansu,Toygun Dagdevir,Ferhat Daldaban,Feridun Yavas 한국풍공학회 2015 Wind and Structures, An International Journal (WAS Vol.20 No.6
This study presents experimental and numerical aerodynamic investigation of a prototype vehicle. Aerodynamics forces examined which exerted on a prototype. This experimental study was implemented in a wind tunnel for the Reynolds number between 105-3.1x105. Numerical aerodynamic analysis of the vehicle is conducted for different Reynolds number by using FLUENT CFD software, with the k-ε realizable turbulence model. The studied model aims at verifying the aerodynamic forces between experimental and numerical results. After the Reynolds number of 2.8x105, the drag coefficient obtained experimentally becomes independent of Reynolds number and has a value of 0.25.
EXPERIMENTAL STUDY ON AN SI ENGINE FUELLED BY LPG/ACETYLENE MIXTURES
Gursel Cinar,Abdelrahman Eldamanhory,Selahaddin Orhan Akansu,Huseyin Enes Fil,Mehmet Ilhan Ilhak 한국자동차공학회 2020 International journal of automotive technology Vol.21 No.5
In the current time, sustainability and development of internal combustion engines is subjected to two kinds of threats which are fossil fuel depletion and environmental pollution. So, considerable efforts in the world have been exerted to develop and introduce alternative gaseous fuels to replace conventional fuel by partial or total replacement. In this study, the effect of adding acetylene to LPG-fuelled SI engine has been examined. This addition was with flow rates of 500, 750 and 1000 g/h for 25 % load and 1000 g/h for 50 % load, respectively. An experimental investigation has been carried out on 4 stroke, 4- cylinder, water-cooled spark ignition (SI) engine at constant speed (1500 rpm). Also, performance and emissions parameters have been tested at different excess air coefficients (λ = 0.8, 1, 1.2 and 1.7). As a result, it has been found optimum conditions which are the addition of 750 g/h acetylene for 25 % load (almost 41 % of the LPG-acetylene mixture at λ = 1.2) and 1000 g/h for 50 % load (almost 36 % of the LPG-acetylene mixture at λ = 1.5). In addition, hydrocarbon (HC) and carbon monoxide (CO) emissions decreased, while NO emissions increased when compared to that of baseline LPG operation.