Abstract
Recent experimental studies with visualizing flame images revealed that the occurrence of LFI (Low Frequency Instability 100Hz) in hybrid rocket co mbustion is significantly related with the coupling of pressure and combustion fluctuations of around 500 Hz band in the post chamber. The co mbustion gas which containing the unburned fuel and small-scale vortices generated on the fuel surface flows into the post-chamber. Therefore, a co mplicated turbulent structure as well as additional co mbustion of the unburned fuel should take an important role of init iating the LFI process somehow. The purpose of this study is to implement chemical reaction together with the wall blowing effect in numerical calculation and to monitor the oscillatory characteristics of reactive flow in the post chamber.
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