Study on influence of forced vibration of cooling channel on flow and heat transfer of hydrocarbon fuel at supercritical pressure

The cooling channel of a scramjet is the fundamental structure active thermal protection for an engine. Till now, studies have focused mainly on steady-state flow and heat transfer process in channel. However, vibration intensity engine increases sharply as flight speed increases, because which, exchange mechanisms based under stable conditions cannot be applied vibration. In this study, experimental methods are used to study characteristics forced hydrocarbon fuel at supercritical pressure. addition, influences different frequencies amplitudes analyzed. research results show that pressure, when temperature below critical inner wall above temperature, external vibrations would enhance pressure unstable, suppress instability while strengthening exchange.