The Sturm Group offers efficient solutions and systems at the highest level. CADFEM carried out flow analyses to optimize a special design of a blow-off system for the removal of residual dust before the painting of car bodies, under various conditions.
The complex cleaning systems require not only calculations for power-efficient blowers, but also data for designs that guarantee a uniform discharge pressure to the required specifications.
The flow conditions within the blow-off system were calculated with Ansys CFX on a half symmetry model.
Due to the very exact prediction of the flow behavior, precisely fitting and energetically optimized blowers can be used. This reduces not only the purchase costs, but also the operating costs considerably.
Constantly growing demands on the quality and cleanliness of products require increasingly complex cleaning systems from today's industrial parts cleaning suppliers. This requires not only power-efficient blowers, but also designs that guarantee a uniform blow-off pressure to the required specifications. In order to meet these requirements, a blow-off system for removing residual dust before painting car bodies should be investigated and optimized by means of flow analyses.
The simulations and the knowledge about the flow behaviour of the plant obtained from them form the basis for improving the flow control. This is particularly helpful if, as in this case, a special version of a plant is involved for which previous empirical values can only be used to a limited extent. On the basis of the simulation results, the pressure loss between inlet and outlet can be further reduced and the even flow distribution and high outlet speed of the air at the slot nozzles can be guaranteed. Due to the very exact prediction of the flow behavior, precisely fitting and energetically optimized blowers can be used. This reduces not only the initial costs but also the operating costs considerably.
The flow conditions within the blow-off system were calculated with Ansys CFX on a half symmetry model (Figure 2). For this analysis a mass flow was specified at the inlet, which is generated by a previously selected fan. The calculations provided the velocities and pressures at the outlet nozzles. Thus, it was possible to check whether the selected fan meets the requirements. Since the calculations provided the flow conditions in the entire duct and not only at the outlet nozzles, concrete suggestions for improving the flow in the duct could be made. As a result, the formation of eddies could be identified and prevented by appropriate design modifications.