一、绪言 两相流道中某一截面上的平均截面含气率α是两相流动和沸腾传热研究中的一个重要参数。学者们提出了许多计算α的数学模型,但因它与流型、热流密度,质量含气率及流动方向等都密切相关,依靠理论模型进行计算目前尚有局限性,因此α的实验测定仍然十分重要。本法可用于连续测量,对流型影响甚微,灵敏度高,而量测惯性小。 I. INTRODUCTION The average section gas content α of a section in a two-phase flow channel is an important parameter in the study of two-phase flow and boiling heat transfer. Scholars have put forward many mathematical models for calculating α, but because of its close relationship with flow pattern, heat flux, mass gas content and flow direction, there are still some limitations based on the theoretical model, so the experimental determination of α is still Very important. This method can be used for continuous measurement, convection-type little influence, high sensitivity, and measurement inertia.