Abstract
To get the effects of chamber width on the H2/Air rotating detonations, several models with different widths have been investigated. By using a one-step chemical reaction model, one wave is induced in all models. The chamber width has a significant effect on the flow field. When the chamber width is small, the variation of the flow field with the radius is not obvious. But when the width increases, the curvature of the detonation wave reflecting between the inner and outer walls at the head would become enlarged. The height of the detonation wave both on the inner wall and the outer wall has been presented. When the width reaches a limited value, the detonation wave cannot sustain on the inner wall. The normal velocity is used to characterize the detonation wave. The normal velocities on the outer wall and average diameter are almost the same. The former one is approximately the CJ value.
Highlights
Tangential combustion instability is the most serious problem in the development of liquid rocket engine
The rotating detonation in a tangential direction induced by the leading wave during the process of combustion is an important factor to form this type of tangential instability
The results show that the chamber width has a significant effect on the detonation wave
Summary
Tangential combustion instability is the most serious problem in the development of liquid rocket engine. Smirnov et al [5, 6] studied on the rotating detonation in a ramjet engine They investigated on the peculiarities of the ignition process and transition stage towards the rotating detonation wave mode in a D unsteady-state problem statement. The results validate the possibility of rotating detonation in a ramjet engine and enrich the detonation wave theory Their model is a coaxial annular combustor all the same. To compare the differences of wave between the annular and hollow chambers, it is very important to capture the flow field in the transition geometry. To reveal the physical mechanism more accurately, simulations are carried out to investigate the effect of chamber width on H2/Air rotating detonation. It is hoped to enrich the detonation wave theory and make a contribution to understanding the structure in the transition chamber
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