POA * ONLINE SUBSCRIPTION ONLY

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 constant pressure 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 Performance Prediction. For the first the input is a selection of entry and required exit pressures and flow rates, together with estimates of loss coefficients in the primary and secondary nozzles, mixing duct and diffuser. The program will optimise the ejector, calculating the primary nozzle, secondary inlet and ejector exit dimensions. For the second case, the ejector dimensions are input together with the loss factors again and a range of entry flow conditions and the program will calculate 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 both procedures. The program is provided in a complied form as ESDUpac A9322 and is incorporated into VIEWpac 9322A.