A simple and approximate method is worked out on changing working states to the characteristic of steam falling away from some back stages of a turbine in the working state of the little volume flow.
本文针对汽轮机末几级在小容积流量工况下产生脱流的特点，结合工程实例推导出一种简单近似的变工况核算方法。
The grain characteristic of falling dust and different height surface and their relationship were analyzed by the field observation data.
研究以野外观测为主要手段，分析了不同高度大气降尘与不同下垫面沙粒的粒度特征及二者间的关系。
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