Abstract
In order to solve the problem of uneven air inlet flow in the guide channel of autoclave, three optimization schemes for the guide plate were proposed. The flow field in the guide channels of autoclave was simulated and analyzed by the realizable k-epsilon turbulence model and dynamic boundary method. The results show that the three optimization schemes have a certain effect on solving the problem of uneven air inlet flow in each guide channel, but some of them also have some negative effects. The integration of the three optimization schemes effectively increases the total air inlet flow of the guide channels; the increase ratio reaches 4.15%, improves the flow-field characteristics at the outlet of the guide channels and greatly reduces the difference in the air inlet flow in the left and right guide channels; the difference ratio drops from 62.61% to 5.37%.
Highlights
Autoclave is a large horizontal pressure vessel, which is widely used in industries that require high temperature or pressure production process, such as heavy metal smelting, refractory brick immersion coal infiltration, heating or cooling of composite glass, cable vulcanization, medicine, aerospace industry, insulation materials and military industries, etc
Through the simulation analysis of the air inlet flow characteristics of the guide channels and the air flow characteristics at the outlet of the guide channels in the autoclave under each scheme, the following conclusions are drawn: (1) Optimization scheme 1 solves the problem of the large difference in the air inlet flow of the left and right guide channels in the autoclave by reducing the air inlet flow of the left guide channel and increasing the air inlet flow of the right guide channel
Optimized scheme 1 causes a slight increase in the total air inlet flow of the guide channels in the autoclave, and at the same time causes a certain decrease in the air inlet flow of the middle guide channel
Summary
Autoclave is a large horizontal pressure vessel, which is widely used in industries that require high temperature or pressure production process, such as heavy metal smelting, refractory brick immersion coal infiltration, heating or cooling of composite glass, cable vulcanization, medicine, aerospace industry, insulation materials and military industries, etc. The uniformity of the air inlet flow of each guide channel in the autoclave and the velocity characteristics of the air at the outlet of the guide channels have a very important influence on the overall flow-field characteristics and temperature-field distribution characteristics in the autoclave. The heating row and the cooling row located near the two sidewalls in the autoclave heat or cool the air to realize the control of the temperature in the autoclave It can be seen from the above analysis of the air distribution and flow directions that the flow-field characteristics in the autoclave, especially the air inlet flow characteristics in the guide channels and the flow characteristics of the air at the outlet of the guide channels, have a very important influence on the change efficiency and uniformity of the temperature field in the autoclave. The dynamic boundary method is used to simulate the rotation of the fans in actual work of the autoclave and the air suction and discharge process caused by the rotation with the fans
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