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A numerical simulation was performed to investigate the performance of oil-injected twin screw air compressor with the thermodynamic process of compression between the oil and air phases. A generalized approach method for numerical simulation was applied which implies the computation of screw compressor thermodynamic process. Numerical analyses were performed using a three-dimensional model with SST...
Tip clearance between the screw rotor and rotor housing in self-priming vacuum pump is an important factor affecting the performance of the pump. In this study, the effect of asymmetrical tip clearance on the performance of self-priming pump was numerically investigated with various values of aspect ratio of lower tip clearance and upper tip clearance in rotor housing. Numerical analysis was also...
In this paper, design optimization for mixed-flow pump impellers has been studied using a commercial computational fluid dynamics (CFD) code and design-of-experiments (DOE). The design variables of meridional plane and vane plane development were defined for impeller design. The blade shape of impeller was designed using traditional method that the inlet and exit angles are connected smoothly. First,...
An air amplifier makes air flow increased by ejecting a small amount of air, which results in the Coanda effect: A tendency of keeping fluids attached to an adjacent surface while the air flow is passing along the wall boundary. In this paper, the flow characteristics of an air amplifier were investigated with various flow and geometrical conditions. In particular, various values of the Coanda nozzle...
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