H114 EFFECTS OF LIQUID VISCOSITY ON FLOW CHARACTERISTICS IN GAS LIQUID TWO-PHASE FLOW(Liquid film flow)

概要

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In order to clarify the effects of liquid viscosity on the flow characteristics of annular flow, the structure of a gas-liquid interface and the flow rates of droplets entrained with gas were measured simultaneously for three kinds of liquids with different kinematic viscosities of 1.0, 3.2 and 9.9μm^2/s. The time-spatial traces of liquid film thickness, as measured by five holdup probes arranged axially, are presented and it is found that the inception of disturbance waves occurs at the Reynolds number of Re_l = 200 or at the non-dimensional liquid film thickness of t_<fm>^+ = 6.5. Furthermore, the flow rates of the entrained droplets are presented for each kind of liquid and it is clarified that the droplets occur before the inception of the disturbance waves with an increase in the kinematic viscosity of the liquid. The present results are compared with the published criteria in the inception of the droplets and a new criterion is proposed.
一般社団法人日本機械学会の論文
2000-10-01