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本刊1984年第1期介绍了节流孔板计算程序。但在高压电厂均采用节流喷嘴来测量主蒸气流量,为此,编写了节流喷嘴计算程序。同时,根据我国现行标准 GB2624—81对原孔板计算程序又作了修改一并列入,以方便用户。本程序在紫金Ⅱ型微机上进行了实例验算,其精度满足要求。在一般微机上均可使用。程序中所使用之公式及有关规定均以现行国际标准 ISO5167—1980为依据。该国际标准与我国现行标准 GB2624—81(即国际标准 ISO/R541—1967)的主要规定基本一致。但它提供了统一的流出系数等计算公式,为应用计算机计算节流装置创造了有利条件。
This issue in 1984 No. 1 introduced the orifice calculation program. However, high-pressure power plants are used to measure the main steam throttle orifice flow, for which, the preparation of a throttle nozzle calculation program. At the same time, according to China’s current standard GB2624-81 on the original orifice calculation procedures have also been modified included, in order to facilitate users. The program in the Zijin Ⅱ type computer carried out an example of checking, its accuracy to meet the requirements. In the general computer can be used. Procedures used in the formula and the relevant provisions are based on the current international standard ISO5167-1980 as the basis. The international standards and our current standard GB2624-81 (that is, the international standard ISO / R541-1967) the main provisions are basically the same. But it provides a uniform outflow coefficient and other calculation formulas, which have created favorable conditions for the application of computer-based throttling device.