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本文阐述了利用Υ射线的吸收原理,解决模型试验中高速含沙水流掺气浓度的测试方法和技术问题。初步分析了该法测量掺气浓度的误差,由放射性测量引起掺气浓度的误差小于±0.25%。此法为非接触式测量,不发生干扰流态现象,而且测量迅速、可靠。
This paper describes the testing methods and technical problems of using γ-ray absorption principle to solve the aeration concentration of high-speed sandy flow in model tests. The error of the method for measuring the concentration of the gas is analyzed preliminarily. The error of the gas concentration caused by the radioactivity measurement is less than ± 0.25%. This method is non-contact measurement, does not interfere with the flow phenomenon, and the measurement quickly and reliably.