Heat Transfer Amplification due to Transverse Mode Oscillations

摘要

The goal of this research is to estimate the magnitude of heat transfer amplification due to combustion instability in the first tangential mode. A theoretical investigation introduced a model consisting of a quasi-steady-state description of the oscillating flow. An experimental facility was constructed, and a few sets of experiments were conducted. The results show that transverse pressure oscillations can increase heat transfer to the walls up to about twofold for pressure oscillations of 50% of the mean pressure. Thus, substantial amplification of heat transfer should be expected in combustors operating under instability conditions. This effect may be particularly crucial in liquid-propellant rocket engines.