Browsing by Author "Sürmen, Ali"
Now showing items 1-10 of 10
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CFD-based investigation of the effectiveness of a novel longitudinal ventilation concept in tunnels
Altay, Merve; Sürmen, Ali (Avestia Publishing, 2017)[No abstract available] -
Development of a variable-profile cam to enhance the volumetric efficiency of IC engines
Sürmen, Ali; Arslan, Ridvan; Kopmaz, Osman; Avci, Atakan; Karagoz, Irfan; Karamangil, M. Ihsan (INDERSCIENCE ENTERPRISES LTD, 2017)In this study, it is aimed to develop a new concept camshaft for continuously variable valve timing (CVVT). The concept is based on obtaining a curvilinear cam surface by integrating a number of conventional cam contours. ... -
Effect of the relative positions of vehicular blockage on the smoke flow behaviour in a scaled tunnel
Altay, Merve; Sürmen, Ali (Elsevier Sci Ltd, 2019)Ventilation is an efficient method to keep the fire induced smoke dispersion under control in tunnel fires. Critical ventilation velocity (Uc), defined as the minimum longitudinal velocity to prevent smoke back flow from ... -
Enhancing the heavy load performance of a gasoline engine converted for LPG use by modifying the ignition timings
Erkus, Baris; Karamangil, M. Ihsan; Sürmen, Ali (PERGAMON-ELSEVIER SCIENCE LTD, 2015)This paper presents the results of the experiments conducted on a spark-ignition (SI) engine fuelled with liquefied petroleum gas (LPG) by varying the ignition timing at the excess air coefficients of 1.0 and 1.3. Experiments ... -
Experimental investigation of performance and emission improvement by altering ignition timing with use of E10 ethanol blend in SI engine
Karamangil, Mehmet İhsan; Turkoz, N.; Erkus, B.; Sürmen, Ali (Elsevier, 2013)In this study, the best ignition timing for an SI engine with the use of E10 ethanol blend was experimentally investigated. Ignition timing was retarded successively by 2 degrees up to 6 degrees at most (denoted as -2, -4 ... -
Experimental investigation of the effect of E85 on engine performance and emissions under various ignition timings
Türköz, Necati; Erkuş, Bariş; Karamangil, M. Ihsan; Sürmen, Ali; Arslanoǧlu, Nurullah (Elsevier Ltd, 2014)In this study, we experimentally investigated the best ignition timing in an SI engine using an E85 ethanol blend by altering the timing angle with respect to gasoline use regarding the output performance parameters such ... -
MATHEMATICAL MODELING OF HC EMISSIONS RELEASED by OIL FILM for GASOLINE and GASEOUS FUELS
Karamangil, M. Ihsan; Yenice, Seckin; Kaynakli, Omer; Sürmen, Ali (Gazi Universitesi, 2014)Oil film on cylinder liner has been suggested as a major source of engine-out hydrocarbon emissions. In this study, a mathematical modeling for the rate of absorption/desorption of the fuel in the oil film has been developed ... -
Mathematical modeling of hydrocarbon emissions from oil film for different fuels
Karamangil, M. Ihsan; Sürmen, Ali; Yenice, Seckin (Elsevier, 2014)Oil film on the inner surface of the cylinder liner is one of the major sources of the vehicle-out HC emissions as fuel vapor is absorbed by the oil film under high pressure and then released after late expansion stroke ... -
Modelling and Performance Analysis of an Electric Vehicle Powered by a PEM Fuel Cell on New European Driving Cycle (NEDC)
Işıklı, Fırat; Sürmen, Ali; Gelen, Ayetül (Springer Science and Business Media Deutschland GmbH, 2021)Modelling of a complete polymer electrolyte membrane fuel cell (PEMFC) power systems and performance of the models when subjected to common driving cycle are important research issues. In this study a complete PEMFC system, ... -
Tünel yangınlarının modellenmesi ve etkin parametrelerin modellemedeki gerçekçiliğinin incelenmesi
Altay, Merve (Bursa Teknik Üniversitesi, 2017)Bütün dünyada taşıt trafiğindeki artış oranı sebebiyle karayolu tünellerinin inşası ve karmaşıklığı giderek artmaktadır ve tünellerin güvenliği devlet adamları, araştırmacılar ve mühendisler arasında ilgi odağı olmuştur. ...
