Flame and emissions characteristics of Jet A-1 blended with biodiesel of waste cooking oil using lean pre-vaporized premixed combustion technique

Belal, Belal Y.; Attia, Ali M.A.; El-Batsh, Hesham M.; Moneib, H.A.

doi:10.21608/bjest.2018.445225

Flame and emissions characteristics of Jet A-1 blended with biodiesel of waste cooking oil using lean pre-vaporized premixed combustion technique

Document Type : Research Article

Authors

¹ Mechanical Engineering Department, Benha Faculty of Engineering, Benha University, Benha, Qalubia, Egypt

² Mechanical Power Engineering Department, El-Mattaria Faculty of Engineering, Helwan University, Cairo, Egypt

10.21608/bjest.2018.445225

Abstract

Lean Pre-vaporized Premixed (LPP) combustion concept would be the perfect promising solution for clean liquid fuel combustion aiming to meet the current stringent emission norms. This approach was rarely studied for the combustion of blended fuels having a portion of biodiesel. The current work presents the results of an experimental study about the impact of blending 20 % vol. biodiesel produced from waste cooking oil methyl ester (WCOME) with Jet A-1 (symbolized as B20) on the flame characteristics of LPP combustion. The WCOME was prepared by the transesterification method using ultrasonic to reduce the time of the production process. The flame was stabilized using a high swirl burner with swirl number SN=0.55 configuration characterized by the formation of central recirculation zone. The temperature of the fuel/air mixture entering the combustion chamber was kept constant at 250 °C with equivalence ratio φ = 0.75 for all tested cases. The results of the present study revealed that the local flame temperature distribution of B20 was slightly lower than that of Jet A-1. It can be concluded that, the biodiesel addition to Jet A-1 has a great effect on local and global emission characteristics of LPP combustion where CO and NOx emissions of B20 at the combustor exit were decreased significantly by 70% and 58%, respectively, compared to those of pure Jet A-1 fuel. Thus, the Jet A-1 fuel can be replaced by B20 without any modifications in the combustor design as they have similar temperature distribution and great emission reduction.

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