The role of approximate analytical results in the study of two-phase flow in nozzle

Abstract

The small slip approxitnation to the theory of two-phase flow in rocket nozzles is reviewed to show that the inaccuracies associated with drag and heat transfer laws, and those associated with the fundamental approximation, are independent and that the former may be removed algebraic1y. Selected applications ofthe approximate theory are discussed to indicate that these stress the nature of the dependence of the results upon the relevant physical parameters and the possible consequence of scaling laws, rather than numerical accuracy too often limited by inaccurate initial data. It is suggested that approximate analytical results may offer much more assistance to the rocket engineer than has yet been used to advantage.