蒸汽喷射压缩器的研究受到实验条件及成本的限制,多采用数值模拟的方式进行,为了提高研究效率经常对模型进行有效简化.通过对完整的三维模型、一种简化的三维模型及五种简化的二维模型进行数值模拟对比研究,结果表明,由于内部流场不对称,简化的三维模型所得结论不可信,五种简化的二维模型结果基本一致,但由于实体不是严格的回转体,二维模型仍不能完全等同三维模型,只能在定性研究中适用.%The most common research method of steam ejector is numerical simulation. In order to improve the effi-ciency of the research,the model needs to be simplified. Through a complete 3D model,a simplified 3D model and five kinds of simplified 2D model for numerical simulation comparison,the results show that the conclusion made through the simplified 3D model is not credible because of the asymmetric internal flow field. The results are rough-ly consistent through the five kinds of simplified 2D model. But because the object is not a standard rotating body, the 2D model is not completely equivalent with the 3D model. So the simplified 2D model can only be applied in the qualitative research where the accuracy is not high.
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