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本文在附面层理论分析和平面叶栅损失计算的基础上,做一些合理的近似简化以后,应用最优化理论,提出了叶栅叶型背弧上最优流速分布的数值计算方法。其计算结果和前人用理论计算方法得到的结果比较符合。本方法有适合工程设计中应用的特点。本文在二元、不可压缩假设下,通过对叶型背弧环量等参数的适当处理,提出了一套较完整的、根据叶型背弧上最优流速分布等条件求解叶栅叶型的优化设计方法,并且将此方法编成电子计算机程序。本文在新型轴流通风机设计中采用优化方法设计叶栅叶型,经初步试验证实,此方法是行之有效的。
Based on the theoretical analysis of surface layer and the calculation of plane cascade loss, this paper makes some reasonable approximation simplifications. After applying the theory of optimization, a numerical method for calculating the optimal velocity distribution on the blade backspin is proposed. The calculation results are in good agreement with those obtained by predecessors using theoretical calculation method. This method has the characteristics suitable for engineering design. In this paper, under the binary and incompressible assumptions, a proper set of parameters such as the amount of back arc loop is put forward, and a more complete set of parameters is obtained according to the optimal velocity distribution on the back arc of the blade Optimize the design method, and compile this method into a computer program. In this paper, a new method of designing axial flow fan is adopted to optimize the design of the cascade blade. After preliminary tests, this method is proved to be effective.