Abstract
Recently, many studies on annular mist flows have been reported. Most of them focus on a flow which has been fully developed or has reached its equilibrium state. On the flow in the non-equiliblium state, however, there are only a very few systematic studies. But two-phase flow phenemena in actual industrial devices are often in non-equilibrium. Therefore it is necessary to accumulate and analyze the fundamental data on the flow in non-equilibrium, in order to improve the efficiency of instruments connected with a two-phase flow, and to assure the generality and validity for the experimental data on two-phase flow. In the light of the above-mentioned facts, the author scrutinized some gas-liquid mixing methods in a two-component, annular mist flow closely related to the non-equilibrium length. The gas-liquid mixing devices involved can be classified into the following six classes: porous sinter, annular slot, center single jet, multi-jet, multi-hole and air-blast atomizer. Next, a variety of items relevant to the study of mixing methods, such as mixing devices, experimental conditions and measuremetns and details of some of those involved in this field of research, are set out in a table. Finally, some examples of flow behavior in the non-equilibrium region of an annular mist flow are looked at briefly.
