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Experimental study and prediction of two-phase flow pattern distribution diagrams in multi-channel cylinder dryer, TAPPI Journal July 2023
ABSTRACT: The multi-channel cylinder dryer (MCD) is designed to improve heat transfer. Although there are numerous research studies on the pressure drop, heat transfer characteristics, and flow pattern in static state of MCD, there is little research on the flow pattern in the rotating state. In this paper, the distribution of flow pattern in MCD under different rotating speeds and steam mass flow rates is studied. Furthermore, the logistic regression method (LR) is used to predict the flow pattern diagrams. The results show that in the front section of the flow channel, the flow pattern is basically annular flow, which is not affected by mass flow rate and rotating speed. On the other hand, wavy flow, vortex flow, slug flow, and bubble flow can be observed when the fluid enters the middle and the end section. The higher the rotating speed and the steam mass flow rate, the more the flow pattern tends to be an annular and wavy flow. At the end of the passage, the flow pattern is mainly slug flow. The predicted flow pattern diagrams are in good agreement with the experimental result, and to obtain an effective flow pattern in the middle and the end section of the flow channel, the influence of increasing rotating speed is greater than that of increasing steam mass flow rate. However, the specific rotating speed, steam mass flow rate, and other parameters should still be set by combining with the actual situation. This work can provide some references for the further study of MCD flow characteristics.
Application of Cross Directional Multivariable Prediction Control to Linerboard Machines, 2008 PAPERCON Conference
Application of Cross Directional Multivariable Prediction Control to Linerboard Machines, 2008 PAPERCON Conference
Application of a Multivariable Control Technique on Supercalenders, 2008 PAPERCON Conference
Application of a Multivariable Control Technique on Supercalenders, 2008 PAPERCON Conference
Comparison Between North American and Imported Sheet Fed Offset Printing Papers, 2008 PAPERCON Conference
Comparison Between North American and Imported Sheet Fed Offset Printing Papers, 2008 PAPERCON Conference
THE RELATIONSHIP BETWEEN PIGMENT PROPERTIES, PAPER STRUCTURE AND THE SHOW-THROUGH OF PRINTED COLOUR, 2008 PAPERCON Conference
THE RELATIONSHIP BETWEEN PIGMENT PROPERTIES, PAPER STRUCTURE AND THE SHOW-THROUGH OF PRINTED COLOUR, 2008 PAPERCON Conference
Active Dryer Control For Sheet Break Recovery, 2008 PAPERCON Conference
Active Dryer Control For Sheet Break Recovery, 2008 PAPERCON Conference
An Innovative Approach to Higher Brightness and Whiteness, 2008 PAPERCON Conference
An Innovative Approach to Higher Brightness and Whiteness, 2008 PAPERCON Conference
Press Rebuilds for Improved Pressing Efficiency, 2008 PAPERCON Conference
Press Rebuilds for Improved Pressing Efficiency, 2008 PAPERCON Conference
Water Release from Fractionated Stock Suspensions. 1. Effects of the Amounts and Types of Fiber Fines, 2008 PAPERCON Conference
Water Release from Fractionated Stock Suspensions. 1. Effects of the Amounts and Types of Fiber Fines, 2008 PAPERCON Conference
Single nip presses and the benefits of innovative press fabric designs, 2008 PAPERCON Conference
Single nip presses and the benefits of innovative press fabric designs, 2008 PAPERCON Conference