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提出一种基于滑速比的计算模型,用于高含气率工况下气相流量的计算和预测,并采用伽马射线探测器加文丘里管的测量技术方案进行了实验验证.实验结果表明,对体积含气率在92％～100％的工况,新模型的高含气率气-液两相流流量的预测结果与真实气相流量相对误差保持在±10％以内.“,”In this paper, a slip ratio based calculation model was developed to predict the gas mass flow rate under high gas volume fraction conditions, which was verified against an experimental investigation with a Venturi meter and a gamma ray attenuation system. Experiments showed that the new model could accurately predict the gas mass flow rate with the relative errors less than ±10％ when the gas volume fraction ranging from 92％ to 100％.