Scramjet technology is one of the revolutionary technologies of the
hypersonic industry. The scramjet engine uses air-breathing propulsion technology,
which has been proven to be the most promising technology for high Mach number
flights. The paper focuses on the status, key challenges and future scope of the scramjet
engines. This paper presents an extensive literature review of the experimental and
computational studies carried out by various researchers around the globe. In this
paper, the current developments in scramjet technology and its future scope are
precisely stated. It is concluded from the review that the flow inside the scramjet
combustor is very complex and sensitive. The understanding of the turbulence,
boundary layer formation and separation, physics of the flow, and the physiochemical
processes involved in combustion still require extensive dedication of researchers in the
near future to address the stated problems.
Keywords: Boundary layer interaction, Flame structure, Mach number, Supersonic combustion.
