Forced Convection Heat Transfer to Gaseous Hydrogen at High Heat Flux and High Pressure in a Smooth, Round, Electrically Heated Tube

Abstract

Thus, the inclusion of combustion does not modify the local phase velocity of waves. The third on the left side of Equation [12] is a term which comes from the interaction of a pressure oscillation with the combustion processes. If the [2/ — yP(df/dP)] is positive, the amplitude of a pressure wave suffers exponential damping as the wave passes through the combustion region. On the other hand, if the friction coefficient is negative, the amplitude of a pressure wave increases in an exponential fashion as the wave traverses the combustion region. Hence, a condition for the unstable growth of a wave is