Title: Advancements in the design and development of scramjet engine: an overview

Authors: Muhammad Ahmad

Addresses: Department of Aerospace Engineering, College of Aeronautical Engineering, National University of Sciences and Technology, Islamabad, 44000, Pakistan

Abstract: This study aims to overcome the difficulties associated with operating scramjet engines at hypersonic speeds, including the short time required for fuel-air mixing and combustion. A thorough review process is used, with an emphasis on cutting-edge approaches including transverse and cavity-based fuel injection systems. The main conclusions show that cavity-based methods improve mixing efficiency and combustion stability, particularly those with many cavities and geometric changes. Techniques for transverse injection that make use of shock waves and shear layers have the potential to improve mixing and stabilise flames while lowering pressure loss. These developments offer vital information for creating novel scramjet designs that guarantee effective combustion, more thrust, and enhanced performance all around. Through sustained improvement in fuel-air mixing technologies, the study emphasises the relevance of these discoveries for furthering hypersonic aeronautical exploration and transportation.

Keywords: scramjet; fuel injection; combustion efficiency; mixing rate; flame stabilisation.

DOI: 10.1504/IJASSE.2025.145206

International Journal of Aerospace System Science and Engineering, 2025 Vol.1 No.2, pp.95 - 132

Received: 12 Jul 2024
Accepted: 02 Feb 2025
Published online: 25 Mar 2025 *

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