Abstract
The present work discusses the effects of self-throttling in conjunction with air throttling on the scramjet combustor performance. Ethylene fueled cavity-strut based combustor is considered and LES simulations are performed to gain insight on influence of Mach number, inlet temperature, self-throttling and air throttling on combustion performance. Our study shows substantial improvement both in mixing and combustion efficiency of the combustor. This is evident from the flow characteristics like shock, vortices, recirculation zones, mixing length and penetration depth. It is found that pressure profile is distributed more uniformly across the combustor with minimum pressure losses. Complete mixing is attained relatively earlier as a result of intense shock-shear interactions. Furthermore, the enhancement in the combustion performance is greater at higher Mach number. The increase in static pressure is found to be a strong function of the inlet Mach number and temperature also. The separate study on effect of initial temperature indicates the mixing length is the shortest with the maximum fuel penetration at inlet temperature of 700 K beyond which the performance deteriorates. It is seen that air throttling is found to be more effective when self-throttling works in tandem alongside having a direct bearing on the combustor performance.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
