Semi-empirical Combustion Efficiency Prediction of an Experimental Air-Blasted Tubular Combustor

Authors Abstract
Content
The preliminary gas turbine combustor design process uses a huge amount of empirical correlations to achieve more optimized designs. Combustion efficiency, in relation to the basic dimensions of the combustor, is one of the most critical performance parameters. In this study, semi-empirical correlations for combustion efficiencies are examined and correlation coefficients have been revised using an experimental air-blasted tubular combustor that uses JP8 kerosene aviation fuel. Besides, droplet diameter and effective evaporation constant parameters have been investigated for different operating conditions. In the study, it is observed that increased air velocity significantly improves the atomization process and decreases droplet diameters, while increasing the mass flow rate has a positive effect on the atomization—the relative air velocity in the air-blast atomizer increases and the fuel droplets become finer. Furthermore, experimental results gave a maximum deviation of 1.5% in the combustion efficiency using the revised correlations. Finally, in conclusion, the reaction rates are the main contributor to the inefficiency of the tubular combustor due to the high aerodynamic loads related to the combustor dimension and operating conditions.
Meta TagsDetails
DOI
https://doi.org/10.4271/01-13-02-0012
Pages
12
Citation
Topal, A., and Turan, O., "Semi-empirical Combustion Efficiency Prediction of an Experimental Air-Blasted Tubular Combustor," Aerospace 13(2):143-153, 2020, https://doi.org/10.4271/01-13-02-0012.
Additional Details
Publisher
Published
Oct 19, 2020
Product Code
01-13-02-0012
Content Type
Journal Article
Language
English