Open AccessNumerical Study of Shock Train in the Isolator of Scramjet Engine
Author(s) -
Jing Fang,
Xiao Yao,
Guan Lin Fang
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/887/1/012031
Subject(s) - isolator , scramjet , combustor , shock (circulatory) , mechanics , aerospace engineering , fluent , computational fluid dynamics , inlet , engineering , combustion chamber , mechanical engineering , combustion , physics , chemistry , electrical engineering , medicine , organic chemistry
The isolator of scramjet engine has to separate the combustor from the inlet so that the scramjet can keep working stably. The steady-state flow field structure, the shock train shape and the starting position of the symmetrical model of isolator under different backpressure ratio are obtained by numerical simulation of commercial software fluent. Using the user-defined function to simulate the pressure fluctuation caused by the irregular heat release in the combustion chamber, the motion of the shock train in the isolation section is obtained. It is found that the start position of the shock train is larger than that of the steady state simulation, which provides a reference for the design of the combustion chamber.