Influence of nozzle structure on steam ejector performance

In order to optimize the ejector performance, the internal flow field of steam ejector is simulated by using Fluent software. In this paper, by using the single factor variable method, we will study nozzle’s structure to improve ejector performance and to reduce the ejector energy loss, which make the ejector work normally. When studying the nozzle, the other structure of the ejector should remain unchanged. The results indicate that there is an respectively optimum Figure of the nozzle convergent length, the nozzle throat length and the nozzle divergent length to make ejection coefficient reach its maximum value. In addition, the nozzle throat diameter have also an optimum value, which makes ejector performance reach its tip.