ESDU 93022:2011

ESDU 93022 introduces a FORTRAN program (ESDUpac A9322) for
ejectors in which the primary and secondary flows are of
non-reacting miscible liquids. Inlet conditions for both primary
and secondary flows can be either a constant pressure source or
provided by a pump. In the latter case, it is assumed that the head
can be expressed as a quadratic in pump speed and flow rate. Two
procedures are provided: a Design Procedure and a Performance
Prediction Procedure. For Design, the input is a selection of entry
and exit pressures and flow rates, together with estimates of loss
coefficients in the primary and secondary inlets, mixing duct and
diffuser and fluid properties. The program optimises the ejector,
calculating the primary nozzle, secondary inlet and ejector exit
dimensions. For Performance, the ejector dimensions are input
together with the loss coefficients and fluid properties and a
range of entry flow conditions; the program calculates flow
conditions throughout the ejector and at exit. The equations on
which the program is based are fully specified, the input format
required is set out in clear tables, and two worked examples
illustrate the use of the procedures.