ESDU 86030 gives step-by-step calculation procedures@ based on performance charts@ for the optimum design of steam/liquid and steam/gas ejectors. For steam/gas ejectors the data are derived from a wide range of experimental results@ but for steam/liquid ejectors there were insufficient data and a theoretical analysis was used. For steam/liquid ejectors a performance prediction method is included that allows off-design behaviour to be estimated. Practical examples using the methods illustrate their application. Mechanical design considerations for the components (primary nozzle@ mixing chamber@ contraction or diffuser) are described@ and the use of annular or multi-nozzle arrangements is considered. Application by multi-staging is discussed. Operating problems in start-up or shut-down are introduced@ together with consideration of instability and noise. Limits imposed by the onset of cavitation and vapour binding are outlined for steam/liquid use. ESDU 94046 introduces a program@ ESDUpac A9446@ that implements the method outlined here.
ESDU 86030 A-2007 history
2007ESDU 86030 A-2007 Ejectors and jet pumps. Design for steam driven flow.