Fluid Tool Research Articles

Researching of airflow circulation system in wood drying kiln based on array fans

This paper investigates the airflow circulation system based on array fans for wood drying kiln process incorporating the simulation of airflow patterns, velocity and pressure distributions. A description of the array-based airflow circulation system is presented, furthermore, by setting the mesh size, grid unit and boundary conditions appropriately with fluid tools and using the renormalisation group (RNG) k-e turbulence model theory, simulation experiments are established. The results are evaluated to demonstrate that the designed system can improve working efficiency and wood drying rate; in addition, it can also avoid the defects and energy wasting. The system developed in this study may be applied in industrial wood-drying kilns, with a clear potential for improved quality and increased speed of drying.

Modelling of airflow circulation systems in wood drying processes

The quality and uniformity of the wood drying are determined greatly by the airflow distribution, airflow velocity, pressure, temperature, humidity in the drying kiln and these factors are significant to the fluidics research on wood drying wind circulation systems. In this paper, an airflow-coupling model and a stack centre model for wood drying wind circulation systems are studied by using renormalisation group k-e turbulence model and wall-function method, the unified modelling theory is used to predict the changing of airflow section distribution, airflow velocity, pressure and temperature in the columned structure. In addition, the emulation researches on the airflow-coupling model and wind-resistance model which is built based on the wind-resistance experiments are done by using fluid tool. Experimental results show that the proposed modelling approach for wood drying wind circulation is feasible and effective.