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前言在三元叶轮的设计中,进口流场确定的正确与否是一个极为重要的问题,它直接影响到整个机组的制冷量和效率,虽然国内很多单位对三元流动理论进行了大量的研究工作,在理论上、计算方法上都取得了很大成绩,但是大多数工作都是在理想模型的基础上进行的,与实际情况仍存在一定的差别,特别是强后弯的离心式三元叶轮,由于叶片进口部分位于叶轮的喉部(见图1),该处正处于速度发生变化的区域,流动情况比较复杂,差别也就更大,这导致目前在
Preface In the design of the ternary impeller, the correctness of the inlet flow field is an extremely important issue, which directly affects the cooling capacity and efficiency of the entire unit. Although many units in China have done a lot of research on the ternary flow theory Work, in theory, calculation methods have made great achievements, but most of the work is based on the ideal model, and the actual situation there are still some differences, especially after the strong Bending centrifugal ternary Impeller, the blade inlet part is located in the throat of the impeller (see Figure 1), where the speed is changing the area, the flow is more complicated, the difference is greater, which led to the current