--- title: How to Perform a Multi-Objective Design Optimization on Mixed-Flow Pumps? description: Get to know how to performance a multi-objective design optimization on mixed-flow pumps. Download the entire publication today! image: https://blog.adtechnology.com/hubfs/2021%20Publications/Publications/Multi-Objective%20Design%20Optimization%20of%20a%20Mixed-Flow%20Pump/Blog_banner_MixedFlow_Pump_Publication.png --- [![](https://blog.adtechnology.com/hs-fs/hubfs/logo-4.png?width=239&height=66&name=logo-4.png)](http://adtechnology.com) # How to Perform a Multi-Objective Design Optimization on Mixed-Flow Pumps? By [Mehrdad Zangeneh](https://blog.adtechnology.com/author/mehrdad-zangeneh) [3D Inverse Design](https://blog.adtechnology.com/topic/3d-inverse-design) [Pumps & Hydraulic Turbines](https://blog.adtechnology.com/topic/pumps-hydraulic-turbines) [TURBOdesign Suite 2020](https://blog.adtechnology.com/topic/turbodesign-suite-2020) May 19, 2021 High specific speed mixed-flow pumps, which are widely used at drainage pumping stations or power plants, often have performance curve instability characterized by positive slope in flow-head curve (stall characteristic) at low flow rate. However, customers demand non-stall characteristics to operate the pumps in stable condition over a wide range of flow rate. Moreover, there are additional requests such as high efficiency from the viewpoint of energy saving in recent years and low shut-off shaft power and/or head to reduce motor capacities or flange sizes. The authors had been developing mixed-flow pumps to meet the demands, however we have learned that the characteristics (stall, efficiency and shut-off shaft power) are in relation of trade-offs. As a result, it is difficult to optimize these performance characteristics by conventional way such as trial and error approach by modifying geometrical parameters and so it is necessary to establish a new design approach. ![Flow chart of the optimization design](https://blog.adtechnology.com/hs-fs/hubfs/2021%20Publications/Publications/Multi-Objective%20Design%20Optimization%20of%20a%20Mixed-Flow%20Pump/Flow%20chart%20of%20the%20optimization%20design.png?width=300&name=Flow%20chart%20of%20the%20optimization%20design.png)*Fig 1 - Flow chart of the optimization design.* [As described in the paper](https://info.adtechnology.com/adt-publication-multi-objective-design-optimization-mixed-flow-pump), there are not so many reports about optimization design of pumps, much less multi-objective optimization about performance characteristics. The authors have been working on multi-objective optimization strategy of mixed-flow pump design by means of three-dimensional inverse design approach, CFD, DoE, response surface model and MOGA. Steady CFD is applied to leverage the approach on the actual design process. This paper describes the multi-objective optimization approach for customizing performance characteristics of high specific speed mixed-flow pumps (Ns=1300). The objectives are pump efficiency, shut-off shaft power/head and instability characteristics. This strategy helps pump designers customize a new pump for specified flow-head characteristics in a short time.   ### [![Download the Publication](https://no-cache.hubspot.com/cta/default/2115715/306b2078-ecce-43bd-891d-4776e8baa8f3.png)](https://cta-redirect.hubspot.com/cta/redirect/2115715/306b2078-ecce-43bd-891d-4776e8baa8f3) Share This Post [![Share on Facebook](https://blog.adtechnology.com/hubfs/ADT%20Blog/Social%20Icons/5e0f3c78452ae7d40a6dbfff_002-facebook-logo.svg)](http://www.facebook.com/share.php?u=https%3A%2F%2Fblog.adtechnology.com%2Fhow-to-perform-a-multi-objective-design-optimization-on-mixed-flow-pumps%3Futm_medium%3Dsocial%26utm_source%3Dfacebook) [![Share on LinkedIn](https://blog.adtechnology.com/hubfs/ADT%20Blog/Social%20Icons/5e0f3c78452ae70fe46dc000_001-linkedin-logo.svg)](http://www.linkedin.com/shareArticle?mini=true&url=https%3A%2F%2Fblog.adtechnology.com%2Fhow-to-perform-a-multi-objective-design-optimization-on-mixed-flow-pumps%3Futm_medium%3Dsocial%26utm_source%3Dlinkedin) [![Share on Twitter](https://blog.adtechnology.com/hs-fs/hubfs/ADT%20Blog/Social%20Icons/5e0f3c78452ae7625c6dbffd_home-socicon1.png?width=24&name=5e0f3c78452ae7625c6dbffd_home-socicon1.png)](https://twitter.com/intent/tweet?original_referer=https%3A%2F%2Fblog.adtechnology.com%2Fhow-to-perform-a-multi-objective-design-optimization-on-mixed-flow-pumps%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&url=https%3A%2F%2Fblog.adtechnology.com%2Fhow-to-perform-a-multi-objective-design-optimization-on-mixed-flow-pumps%3Futm_medium%3Dsocial%26utm_source%3Dtwitter&source=tweetbutton&text=How%20to%20Perform%20a%20Multi-Objective%20Design%20Optimization%20on%20Mixed-Flow%20Pumps%3F) [![Share on Email](https://blog.adtechnology.com/hubfs/ADT%20Blog/Social%20Icons/001-envelope.svg)](mailto:?subject=Check%20out%20https%3A%2F%2Fblog.adtechnology.com%2Fhow-to-perform-a-multi-objective-design-optimization-on-mixed-flow-pumps%3Futm_medium%3Dsocial%26utm_source%3Demail%20&body=Check%20out%20https%3A%2F%2Fblog.adtechnology.com%2Fhow-to-perform-a-multi-objective-design-optimization-on-mixed-flow-pumps%3Futm_medium%3Dsocial%26utm_source%3Demail) ### Mehrdad Zangeneh Mehrdad Zangeneh is Founder and Managing Director of Advanced Design Technology and professor of Thermofluids at University College London. 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