An Experimental Investigation on the Erosion of a Helico-Axial Pump With Gas Presence

Experimental and Numerical Investigations of a Low-Cost Axial Pump Design for the Drainage of Flooded Areas

Volume 1A, Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery ◽

10.1115/fedsm2017-69308 ◽

2017 ◽

Author(s):

Sebastian Wulff ◽

Evgenii Palamarchuk ◽

Raja Abou Ackl ◽

Stephan Haeusler ◽

Paul Uwe Thamsen

Keyword(s):

Experimental Investigation ◽

Low Cost ◽

Blade Design ◽

Cfd Analysis ◽

Flow Conditions ◽

Pump Design ◽

Numerical Investigations ◽

Axial Pump ◽

Implementation Effect ◽

Flooded Areas

This paper presents the optimization of an existing low-cost axial pump for drainage of flooded areas with respect to the efficiency, by means of a CFD analysis and experimental investigation. The numerical simulations helped to analyze the flow conditions inside the pump, to understand the stator implementation effect and to verify the blade design. Based on the results, constructive suggestions were derived for the design of the impeller and the diffuser.

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Experimental Investigation of the Wake Decay Process in an Axial Pump With Varied Rotor-Stator Axial Spacings

Volume 1A, Symposia: Keynotes; Advances in Numerical Modeling for Turbomachinery Flow Optimization; Fluid Machinery; Industrial and Environmental Applications of Fluid Mechanics; Pumping Machinery ◽

10.1115/fedsm2017-69044 ◽

2017 ◽

Author(s):

Han Xu ◽

Mengyu Wang ◽

Donghai Jin ◽

Dakun Sun ◽

Xingmin Gui ◽

...

Keyword(s):

Experimental Investigation ◽

Particle Image Velocimetry ◽

Particle Image ◽

Decay Process ◽

Compressor Stage ◽

Reversible Process ◽

Axial Pump ◽

Piv Measurement ◽

Image Velocimetry ◽

Stator Blade

For a compressor stage, the mechanism of wake recovery leads the rotor wakes to decay in a reversible process through the stator passage. Based on this theory, the rotor-stator axial spacing is believed to be a significant factor bound up with the wake mixing loss. In this paper, the wake decay processes in a tiny axial pump with varied rotor-stator axial spacings are studied using particle image velocimetry (PIV) measurement. PIV results indicate that the rotor wakes interact with the stator blade and generate flow regions with elevated turbulence. This interaction is enhanced when the axial spacing is close. The attenuation process of the disturbance kinetic energy (DKE) and the relative wake depth demonstrate that the axial spacing significantly affects the proportion of the wakes that decay in the stator passage. Close rotor-stator axial spacing is proposed to increase the recovery rate of the rotor wakes. Supplementary CFD computation is conducted to certify that the experimental results are universal for pumps with and without splitters.

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