An approximate formula for the capacitance-void fraction relationship for annular flows

作者：Kim Sin^*; Lee Jeong Seong; Kim Kyung Youn; Kang Kyung Ho; Yun Byung Jo

来源：Measurement Science and Technology, 2009, 20(12): 125404.

DOI：10.1088/0957-0233/20/12/125404

• void fraction
• concentric annular flow
• capacitance
• capacitance void meter

A capacitance method is applied to measure the space-averaged void fraction in concentric annular flows. From the analytical solution of the governing electrical field equations, the expression for the capacitance in terms of a given void fraction is derived. Also, a closed form formula to predict the void fraction from the capacitance measurement is proposed. The relationship between the capacitance and the void fraction is successfully compared with static phantom experiments.

• 出版日期2009-12