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根据五十年代初建立起来的叶轮机械三元流动通用理论,本文提出一个根据多排叶片的S_2中心流面的计算结果提供某一个叶片排的S_1流面计算所需的上、下游流场条件的方法。这个方法也适用于提供对多个叶片排中某一个叶片排的S_1流面上的叶栅进行实验工作时所需的叶栅上、下游条件。本文给出的算例表明:这种方法可以使S_2中心流面计算得到的叶片排上、下游间隙站上的气流参数基本上不因拿掉它的上、下游叶片排而受到影响;同时还表明,使用本方法后得到的S_1流面计算结果与通常的处理方法得到的S_1流面计算结果在叶片的前缘处有明显的差别。
According to the universal theory of turbomachinery ternary flow established in the early 1950s, this paper presents a flow field condition for the calculation of the S_1 flow surface of a blade row based on the calculation results of the S_2 central flow surface of the multi-row blade Methods. This method is also suitable for providing upstream and downstream cascades for experimental work on cascades on the S_1 flow surface of a blade row of a plurality of blade rows. The numerical example given in this paper shows that this method can make the airflow parameters on the upstream and downstream clearance stations calculated from the S_2 central flow surface basically not be affected by the removal of its upstream and downstream vane rows; meanwhile, It shows that the calculated results of S_1 flow surface obtained by using this method are obviously different from the results of S_1 flow surface obtained by the conventional method at the leading edge of the blade.