Journal ArticleDOI
On the Pressure Losses Due to the Tip Clearance of Centrifugal Blowers
Masahiro Ishida,Yasutoshi Senoo +1 more
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In this paper, the authors measured the pressure distribution along the shroud of three types of centrifugal impeller at seven different values of tip clearance each and found that the change of input power due to a change in tip clearance is related to the effective blockage at the impeller tip.Abstract:
The pressure distribution along the shroud is measured for three types of centrifugal impeller at seven different values of tip clearance each. The change of input power due to a change of tip clearance is related to the effective blockage at the impeller tip. Since the change of input power is little for the test cases, the variation of local pressure gradient along the shroud is mostly attributed to the change of local pressure loss. The local pressure loss is related to the local tip clearance ratio and to the local pressure gradient based on the deceleration of relative velocity in the impeller. Since the local pressure gradient is largest near the throat of the impeller, for many impellers the clearance ratio at the throat is used as the representative value. The tip clearance loss is related to the clearance ratio and the pressure rise based on the deceleration of relative velocity in the impeller. A good correlation is observed in all cases at various flow rate.read more
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Journal ArticleDOI
Performance Characteristics of a Centrifugal Pump Impeller With Running Tip Clearance Pumping Solid-Liquid Mixtures
Tahsin Engin,Mesut Gur +1 more
TL;DR: The effect of the clearance between the impeller tip and the casing and the solid concentration, density and mean diameter on the performance of an unshrouded centrifugal pump impeller handling solid-liquid mixtures is investigated in this article.
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Effects of splitter blades on the flows and characteristics in centrifugal impellers
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Impeller Geometry Suitable for Mini Turbo-Pump
TL;DR: In this article, the authors investigated the suitable impeller geometry for a mini turbo-pump, defined as the size having impeller diameter between around 5 mm and 50 mm.
Journal ArticleDOI
Study of tip clearance effects in centrifugal fans with unshrouded impellers using computational fluid dynamics
TL;DR: In this paper, a three-dimensional computational fluid dynamics (CFD) simulation of the flowfield in three different unshrouded centrifugal fan impellers with varying tip clearances is presented.
Journal ArticleDOI
Effects of tip clearance and impeller geometry on the performance of semi-open ceramic centrifugal fan impellers at elevated temperatures
TL;DR: In this paper, three semi-open centrifugal fan impellers have been designed and fabricated using ceramic materials to provide high resistance to temperature, and experiments have been conducted to investigate the performance characteristics of these impellers and the deteriorations in their performance due to varying tip clearance.
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