Scopus İndeksli Yayınlar Koleksiyonu / Scopus Indexed Publications Collection

Permanent URI for this collectionhttps://hdl.handle.net/11147/7148

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  • Conference Object
    Citation - Scopus: 2
    Experimental Spray Investigation of Biodiesel Fuels Derived From Corn Oil and Canola Oil
    (ISRES Publishing, 2019) Ulu,A.; Cellek,S.B.; Rodriguez,A.D.; Ozkol,U.
    Spray characteristics of fuels are one of the most important factors for engine research owing to their relationship between performance output and emission level. The aim of this study was to investigate the spray behavior of biodiesel fuels derived from corn oil and canola oil, utilizing a piezo injector. Effects of ambient pressure and injection pressure on spray characteristics like spray penetration length and spray cone angle were investigated in a constant volume combustion chamber. Ambient and injection pressures were in range of 0-15 bar and 600-1000 bar, respectively. As a result of this study, sampled biodiesel fuels have longer penetration and smaller spray angles. This can be explained by having higher viscosities resulting in slower evaporation and atomization. © 2024, ISRES Publishing. All rights reserved.
  • Article
    Citation - WoS: 9
    Citation - Scopus: 11
    Experimental Investigation of Spray Characteristics of Ethyl Esters in a Constant Volume Chamber
    (Springer, 2022) Ulu, Anılcan; Yıldız, Güray; Özkol, Ünver; Rodriguez, Alvaro Diez
    Abstract: Biodiesels are mainly produced via the utilization of methanol in transesterification, which is the widespread biodiesel production process. The majority of this methanol is currently obtained from fossil resources, i.e. coal and natural gas. However, in contrast with methanol, biomass-based ethanol can also be used to produce biodiesels; this could allow the production line to become fully renewable. This study aimed to investigate the spray characteristics of various ethyl ester type biodiesels derived from sunflower and corn oils in comparison to methyl esters based on the same feedstocks and reference petroleum-based diesel. Spray penetration length (SPL) and spray cone angle (SCA) were experimentally evaluated in a constant volume chamber allowing optical access, under chamber pressures of 0, 5, 10 and 15 bar and injection pressures of 600 and 800 bar. Sauter mean diameter (SMD) values were estimated by using an analytical correlation. Consequently, ethyl esters performed longer SPL (2.8–20%) and narrower SCA (5.1–19%) than diesel under ambient pressures of 5 and 10 bar. Although the SMD values of ethyl esters were 48% higher than diesel on average, their macroscopic spray characteristics were very similar to those of diesel under 15 bar chamber pressure. Moreover, ethyl esters were found to be very similar to methyl esters in terms of spray characteristics. The differences in SPL, SCA and SMD values for both types of biodiesels were lower than 4%. When considering the uncertainty (± 0.84%) and repeatability (±5%) ratios, the difference between the spray characteristics of methyl and ethyl esters was not major.