Analysis of flow field characteristics of drying box and selection of air knife


The following is a brief guide on drying box flow field characteristic analysis and air knife selection:

Analysis of flow field characteristics of drying box:

Flow field modeling: Use computational fluid dynamics (CFD) software, such as ANSYS Fluent, COMSOL Multiphysics, etc., to conduct three-dimensional modeling of the flow field inside the drying box.

Boundary condition settings: Define the boundary conditions inside and outside the drying oven, including inlet wind speed, temperature, humidity, etc., as well as the pressure conditions at the outlet.

Physical parameter settings: Set the physical parameters of the gas, such as density, viscosity, thermal conductivity, etc., as well as the thermal power of the heat source (heater).

Mesh generation: Generate an appropriate mesh to carefully delineate the interior of the drying oven, especially around heat sources and areas where moisture may accumulate.

Simulation and analysis: Run CFD simulation to obtain data such as flow field distribution, temperature distribution and humidity distribution during the drying process.

Interpretation of results: Analyze the simulation results to identify potential humidity accumulation areas, uneven temperature distribution and other issues to provide guidance for optimizing the design of the drying oven.

Air knife (air curtain) selection:

Air knife type: According to the size and shape of the drying box, select the appropriate air knife type. The common ones are parallel air knives and cross air knives.

Wind speed control: Determine the required wind speed range. The wind speed needs to be strong enough to form an effective wind curtain, but not so high that it consumes too much energy.

Air knife layout: Based on the drying box geometry and flow field analysis results, select an appropriate air knife layout to ensure air curtain coverage during the entire drying process.

Number of air knives: According to the size of the drying box and drying needs, determine the required number of air knives to achieve uniform air drying effects.

Control method: Considering the control method of the air knife, the work of the air knife can usually be automatically adjusted according to temperature, humidity or drying time.

Energy efficiency: During the selection process, attention should be paid to the energy efficiency of the air knife and its impact on the overall drying process.

Build quality: Choose a reliable air knife manufacturer to ensure reliable quality and performance.

In short, when analyzing the flow field characteristics of the drying box, combined with the results of computational fluid dynamics simulation, the air flow and heat transfer during the drying process can be better understood, so that the air knife layout can be selected and optimized in a targeted manner. To improve drying efficiency and quality.

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