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impellers
Cavitation in semi-open centrifugal impellers for a miniature pump
      
Cavitation in miniature pumps was investigated experimentally for two semi-open centrifugal impellers.
      
Although both impellers had the same blade cross-section, one impeller had a two-dimensional blade, while the other had a leaned blade.
      
Three impellers (I, II, III) having same outer diameter, but different radius ratio and blade angles were employed for the investigation.
      
The total pressure developed by the impellers in each case is found to be maximum at a circumferential position of around 270°.
      
The total and static pressures at the inlet of impellers are more or less same regardless of impeller and tongue geometry, but they vary considerably at exit of the impellers.
      
Turbo-pump with isolated two stage impellers for future rocket engine (Trial to drive impellers independently)
      
To suppress the cavitation in the impellers and to make the turbo-pump lives longer, the inducer was separated from the main impeller and both impellers were driven independently.
      
The performance of the pump and the flow conditions around the impellers were investigated experimentally and the following results were obtained.
      
(2)The rotational speeds of both impellers can be controlled independently in order to suppress simultaneously the cavitation not only in the main impeller, but also in the inducer.
      
do not correlate directly if the mixing systems (impellers-baffles) are dissimilar.
      
Momentum transfer in an agitated vessel with off-centred impellers
      
Momentum transfer was investigated in an unbaffled agitated vessel of inner diameter 0.3 m equipped with different off-centred impellers.
      
Effects of type and number of impellers and liquid viscosity on the power characteristics of mechanically agitated gas-liquid sy
      
Effect of the type and number of high-speed impellers installed on a common shaft on the power characteristics was investigated in water and glucose solutions of different concentration.
      
The relative power consumption was compared for different configurations of the impellers.
      
High-temperature brazing of steel impellers of centrifugal compressors using autovacuum heating
      
In bioreactors, the filamentous or clump mycelia increase the viscosity of the medium, wrap around impellers, and block the nutrient transportation, leading to a decrease in production efficiency and bioreactor performance.
      
In bioreactors, the filamentous or clump mycelia increase the viscosity of the medium, wrap around impellers, and block the nutrient transportation, leading to a decrease in production efficiency and bioreactor performance.
      
These suggested minimal power drops with aeration for dual CD-6 impellers and hybrids containing the CD-6 impeller design.
      
 

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