Novel ejector model with experimental validation

According to the turbulent flow behavior in the ejector, a critical circle at the entrance of mixing chamber is introduced, where the Mach number of entrained flow gets 1. Based on the characteristic of velocity distribution in a pipe, a 2D function is adopted to approximate the real velocity distribution inside the ejector. An overall energy conservation equation is used to complete the ejector mathematic model. Compared with the existing 1D models, the new model with the 2D velocity distribution function is more accurate. In addition, the new model is very simple which only consists of 8 algebraic equations and can be conveniently utilized for the performance prediction, and the effectiveness of the model is validated by the experiments.