Effects of Fuel-Lean primary rocket on bypass ratio in RBCC ejector mode

Bin Bin Lin, Hong Liang Pan, Fei Qin, Guo Qiang He, Xiang Geng Wei, Lei Shi

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

10 Scopus citations

Abstract

As ejector modes of RBCC exist from takeoff to low supersonic flight speed and play an important role in the engine performance, a high bypass ratio is hence expected in order to improve the specific impulse. Basically, the bypass ratio varies with the primary rocket mixture ratio which results in a DAB or SMC mode in RBCC, hence CFD study was conducted in the paper to investigate the effects of fuel-lean primary rocket on the bypass ratio. The results showed that the bypass ratio increased when the primary rocket operated at fuel-lean conditions, on the contrary, a lower bypass ratio was resulted from a higher pressure in the combustion chamber. Studies were found also that second-fuel injection showed advantages by optimizing in positions and amounts on bypass ratio.

Original languageEnglish
Title of host publication50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014
PublisherAmerican Institute of Aeronautics and Astronautics Inc.
ISBN (Electronic)9781624103032
DOIs
StatePublished - 2014
Event50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and exhibit 2014 - Cleveland, United States
Duration: 28 Jul 201430 Jul 2014

Publication series

Name50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference 2014

Conference

Conference50th AIAA/ASME/SAE/ASEE Joint Propulsion Conference and exhibit 2014
Country/TerritoryUnited States
CityCleveland
Period28/07/1430/07/14

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