Abstract
A determinate mathematical compressible-flow model, with different velocity profiles applicable in the relevant governing equations for a constant-area ejector without diffuser, was formulated. The twelve governing equations were reduced to a single implicit equation for the primary variable P 0. The flow parameters of the primary, secondary and mixed flow can be calculated directly using the solved value of P 0. Some empirical data for an existing system with a duct area ratio of 0·9643 of the secondary flow to the mixed flow were compared with predicted values. The comparisons show that the one-dimensional compressible-flow analysis gives a fairly good agreement. A shock-like jump phenomenon of the ejector flow was observed experimentally in a previous paper and was also found theoretically in the present study. The performances of a stationary ejector, with different inlet area ratios, and secondary-to-primary stagnation pressure ratios are discussed.
Published Version
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