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Perturbation of localised ultra-clean air delivery systems

Abstract : The perturbations of localised ultra-clean air delivery systems due to continual access of operators to handle products have been investigated. It was exhibited that the keystone of localised air delivery systems was a turbulent mixing layer modeling the interface between the polluted and the clean air. Furthermore the obstacle penetrating into the clean air flow was represented by a generic shape, the circular cylinder. Hence the problem of perturbation was approached by studying the interaction between the wake of a circular cylinder and a turbulent plane mixing layer. From the analysis of experimental results a local injection of contaminant has been highlighted. Actions to prevent that pollution were deduced and studied on the Progressive Flux, a localised delivery system developped by the Cemagref. The inherent drawback of uni-directional flow systems was demonstrated and explained.
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https://hal.inrae.fr/hal-02583805
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Submitted on : Thursday, May 14, 2020 - 10:40:42 PM
Last modification on : Wednesday, October 20, 2021 - 3:22:08 AM

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  • HAL Id : hal-02583805, version 1
  • IRSTEA : PUB00015742

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Dominique Heitz, C. Braud, P. Georgeault, J. Delville, G. Arroyo. Perturbation of localised ultra-clean air delivery systems. Food Factory of the futur, 2nd International Conference, Laval, 6-8 October 2004, 2004, Laval, France. pp.4. ⟨hal-02583805⟩

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