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International Journal of Aerospace Engineering
Volume 2016 (2016), Article ID 7604279, 14 pages
http://dx.doi.org/10.1155/2016/7604279
Research Article

Parametric Study of Fuel Distribution Effects on a Kerosene-Based Scramjet Combustor

Science and Technology on Scramjet Laboratory, National University of Defense Technology, Changsha, Hunan 410073, China

Received 11 January 2016; Revised 30 May 2016; Accepted 2 June 2016

Academic Editor: James J. McGuirk

Copyright © 2016 Jun Yang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Generally, the overall performance of scramjet combustor is greatly impacted by the fuel distribution scheme. The current paper mainly conducted a comprehensive parametric study of the impact of fuel distribution on the overall performance of a kerosene-based scramjet combustor. Herein, a 3D supersonic combustor with a recessed cavity and four injection orifices was taken into consideration. The combustor’s performance was analyzed by 3D RANS model. The fuel equivalence ratio for each injection port was taken as the design variables. And the combustion efficiency, the total pressure recovery coefficient, and the drag coefficient were chosen as the objective functions. Some novel data mining methods including DOE technique, Kriging approximation model, interaction analysis, and main effects analysis methods were employed to conduct the parametric study. The distributed fuel injection scheme was optimized by nondominated sorting genetic algorithm. The results show that three objective functions were remarkably affected by both of the total fuel equivalence ratio and the fuel distribution scheme. The objective functions cannot reach the optimal solution at the same time, and there must be a tradeoff among the objective functions.