TURBOdesign Pumps & Fans
TURBOdesign Suite provides tools to designers to put them in direct control of aerodynamic design to streamline every step of the design process for turbomachinery components.
Our Pumps & Fans packages
TURBOdesign Compressors & Turbines
TURBOdesign Suite provides tools to designers to put them in direct control of aerodynamic design to streamline every step of the design process for turbomachinery components.
Our Compressors and Turbines packages...
TURBOdesign Optima
TURBOdesign Suite provides tools to designers to put them in direct control of aerodynamic design to streamline every step of the design process for turbomachinery components.
TURBOdesign Optima is our automatic optimization package
3D Blade Design
Our turbomachinery design toolkits include one on 3D blade design...
Meanline Design
TURBOdesign Suite provides tools to designers to put them in direct control of aerodynamic design to streamline every step of the design process for turbomachinery components.
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Volute/Scroll Geometries
TURBOdesign Suite provides tools to designers to put them in direct control of aerodynamic design to streamline every step of the design process for turbomachinery components.
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Multi-Objective Optimization
TURBOdesign Suite provides tools to designers to put them in direct control of aerodynamic design to streamline every step of the design process for turbomachinery components.
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Design Targets
Investigate detailed flow structure and loss mechanism in a diffuser pump and redesign the impeller and diffuser blade to reduce losses and improve stage efficiency.
Deliverables
Redesigned geometry of the impeller and diffuser.
Impact
Based on unsteady flow predictions the redesigned stage showed up to 4 points improvement in efficiency.
In this project the client asked ADT to perform a hydrodynamic design optimization of a strongly interacting diffuser pump stage using the inverse design code TURBOdesign1. The focus of the design was to minimize the hydrodynamic loss generation particularly in the diffuser channels. Figure 1 shows the pump diffuser arrangement.
The project was divided into several tasks. Initially a detailed flow analysis of the existing pump diffuser was performed. Due to strong interaction between the impeller and the diffuser blade rows, ADT performed a full stage unsteady flow analysis in order to understand the flow structure and loss generation mechanism in the machine. Based on the analysis study, it was found that the majority of loss generation occurred in the diffuser channel. A redesign of the impeller blades was performed using TURBOdesign1 in order to minimize the secondary flow losses in the impeller and reach a more uniform flow condition at the impeller exit and diffuser inlet. Unsteady flow analysis confirmed that the new impeller had a higher efficiency and also resulted in more circumferentially and axially uniform exit flow distribution.
The diffuser redesign was followed by prescribing a modified thickness and loading distribution in the inverse design code TURBOdesign1 so that an optimised flow in the diffuser channel was obtained. Unsteady flow analysis in the pump stage was then performed using the redesigned impeller and diffuser blades.
The results showed up to 4 points improvement in stage efficiency was obtained in the redesign configuration. Flow details comparison show an optimised flow field in the diffuser, see Fig. 2 and 3.