This study refers to an experimental analysis on swirling flow in some shapes of bent diffuser ducts. The study has been carried out for the purposes of investigating the correlation between the rotational intensity of the flow, the main geometrical characteristics of the diffusers and their performance. The cases of a cone, a costant section elbow followed by the previous cone, and a duct obtained by combining the latter with another cone positioned upstream have been studied. It has been seen that an appropriate value for the rotational intensity of the flow, which is not a particularly high value, in all the types studied, determines the advantage in the pressure recovery coefficient. When, on the other hand, the rotational intensity assumes higher values, a considerable reduction in the coefficient itself is experienced.
Experimental Analysis on Swirling Flow and Performance of Bent Diffuser Ducts / Cantore, Giuseppe; R., Bettocchi; D., Moro. - STAMPA. - (1990), pp. 260-268. (Intervento presentato al convegno 1st International Symposium on Experimental and Computational Aerothermodynamics of Internal Flows tenutosi a Beijing, China nel 8-12 Luglio 1990).
Experimental Analysis on Swirling Flow and Performance of Bent Diffuser Ducts
CANTORE, Giuseppe;
1990
Abstract
This study refers to an experimental analysis on swirling flow in some shapes of bent diffuser ducts. The study has been carried out for the purposes of investigating the correlation between the rotational intensity of the flow, the main geometrical characteristics of the diffusers and their performance. The cases of a cone, a costant section elbow followed by the previous cone, and a duct obtained by combining the latter with another cone positioned upstream have been studied. It has been seen that an appropriate value for the rotational intensity of the flow, which is not a particularly high value, in all the types studied, determines the advantage in the pressure recovery coefficient. When, on the other hand, the rotational intensity assumes higher values, a considerable reduction in the coefficient itself is experienced.
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