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本文通过理论分析和试验资料,浅述了在絮凝池模型试验时应当首先考虑的两个问题:试验模型和原型的几何相似关系以及絮凝池的相似准数。这是模型试验结果推广放大的前提条件。通过对不同几何尺寸的絮凝池中絮凝现象的观察对比和有效能耗试验,笔者指出了前人提出的GT、GTC_0、G_0TC_0等几种无因次准数组合之间的异同,并认为以它们作为絮凝池的相似准数均不能反映几何尺寸对絮凝过程的影响,因而有必要对相似准数问题进行进一步探讨。
In this paper, through theoretical analysis and experimental data, two issues that should be considered first in the flocculation tank model test are briefly described: the geometric similarity between the experimental model and the prototype, and the similarity of the flocculation tank. This is the precondition for the extension of model test results. Through observation and comparison of the flocculation phenomena in different flocculation tanks with different geometrical dimensions and effective energy consumption experiments, the author points out the similarities and differences among several non-dimensionality-predictive combinations such as GT, GTC_0, and G_0TC_0 proposed by previous researchers and considers them to be similar to each other. The similarity of the flocculation pool can not reflect the influence of geometric size on the flocculation process, so it is necessary to further discuss the problem of similarity.