Experimental and numerical investigations on controlled parameter selection methods for kerosene-fueled scramjet

Guiqian Jiao; Wenyan Song; Xianglong Zeng; Qiang Fu; Wei Tang; Hantao Li

doi:10.1515/tjj-2023-0087

Article

Experimental and numerical investigations on controlled parameter selection methods for kerosene-fueled scramjet

Guiqian Jiao , Wenyan Song , Xianglong Zeng , Qiang Fu , Wei Tang and Hantao Li

Published/Copyright: January 25, 2024

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From the journal International Journal of Turbo & Jet-Engines Volume 41 Issue 4

Abstract

In order to determine the optimal wall pressure location as the controlled parameter for kerosene-fueled scramjet, a combined approach of numerical simulation and experimental analysis was employed. The results indicate that with an increase in the equivalence ratio of kerosene, the combustor exhibits consecutive modes, including pure scramjet mode, dual-mode scramjet mode, dual-mode ramjet mode, and pressure disturbance to the isolator inlet mode. The peak pressure ratios corresponding to the mode transition boundaries are 1.95, 3.26, and 3.57, with respective isolator outlet Mach numbers of 1.62, 1.0, and 0.74. The equivalence ratio corresponding to mode transition increases with an increase in the combustor inlet total temperature. Considering the dynamic characteristics of wall pressures at different locations, the position at x/L = 0.46 demonstrates the best linearity, highest sensitivity, and greater stability. Hence, it is the most suitable choice as the controlled parameter for fuel flow in this kerosene-fueled scramjet.

Keywords: scramjet; kerosene fuel; control laws; controlled parameters; mode transition; wavelet coherence

Corresponding author: Wenyan Song, School of Power and Energy, Northwestern Polytechnical University, Xi’an 710072, Shaanxi, China, E-mail: wenyan_song@nwpu.edu.cn

Research ethics: Not applicable.
Author contributions: The authors have accepted responsibility for the entire content of this manuscript and approved its submission.
Competing interests: The authors states no conflict of interest.
Research funding: None declared.
Data availability: Not applicable.

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Received: 2023-10-07

Accepted: 2024-01-07

Published Online: 2024-01-25

Published in Print: 2024-12-17

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Articles in the same Issue

https://doi.org/10.1515/tjj-2023-0087

Keywords for this article

scramjet; kerosene fuel; control laws; controlled parameters; mode transition; wavelet coherence