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Communication Dans Un Congrès Année : 2015

Active control of the leakage flow by air injection into the rotational shroud or the fixed carter of an axial fan composed of hollow blades

Tarik, Azzam
  • Fonction : Auteur
Richard Paridaens
  • Fonction : Auteur
Florent Ravelet
Mahmoud Mekadem
  • Fonction : Auteur
Sofiane Khelladi
Hamid Oualli
  • Fonction : Auteur
Farid Bakir

Résumé

In axial fan, the static pressure difference between the suction and the pressure side of the impeller produces a leakage flow through the blade and the casing. This secondary flow occurs in the opposite direction of the working flow and has a negative impact on the overall performances. It tends to reduce the pressure coefficient, the efficiency and the fan operating range while increasing the noise level. That is why many studies dealt with ways to reduce this leakage flow. In this paper, the study focusses on the control of the secondary flow by air injection. Two ways to control this flow are compared. In a first case, the air is ejected from the fixed casing and in a second case the air exit from the rotating shrouds. In both configurations, the ejected air has a direction to counter the leakage flow. To realize the second configuration, a new method to build fan with hollow blades was developed. This new kind of fan allows having internal flows which could exit by any area of the fan. The results obtained by the active controls on the fan characteristic and the efficiency are presented in this article.
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Dates et versions

hal-03444722 , version 1 (23-11-2021)

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  • HAL Id : hal-03444722 , version 1

Citer

Tarik, Azzam, Richard Paridaens, Florent Ravelet, Mahmoud Mekadem, Sofiane Khelladi, et al.. Active control of the leakage flow by air injection into the rotational shroud or the fixed carter of an axial fan composed of hollow blades. CFM 2015 - 22ème Congrès Français de Mécanique, Aug 2015, Lyon, France. ⟨hal-03444722⟩

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