A determinate model of thrust-augmenting ejectors (Q2564109)

A theoretical analysis of the compressible flow through a constant-area jet-engine ejector in which a primary jet mixes with ambient fluid from a uniform free stream is pursued. The problem is reduced to a determinate mathematical one by prescribing the ratios of stagnation properties between the primary and secondary flows. For some selections of properties and parameters, more than one solution is possible, and the meaning of these solutions is discussed by means of asymptotic expansions.