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Nataraj􀀁 and V P Arunachalam  \nDepartment of Mechanical Engineering, Government College of Technology, Coimbatore, Tamil Nadu, India The manuscript was received on 19 April 2005 and was accepted after revision for publication on 25 May 2006. DOI: 10.1243/09576509JPE184  \nAbstract: This article discusses a research methodology for performance enhancement of centrifugal pump through Taguchi’s parametric design concept. The objective is to find an optimum impeller design and geometry that makes the pump functionally reliable for winning customer’s confidence. Computational fluid dynamic (CFD) analysis has been done to knowhow the flow pattern changes in the impeller when the pump is required to run at different operating conditions. The streamline analysis from CFD plots gives informative pictures of the flow field, which help the designer understand how the effect of deviation made in the impeller design specifications significantly influence the pump performance. CFD results match well with the predictions of the pump performance at the duty point as regard to head, discharge, and efficiency of the prototype model. The study infers that the CFD prediction tallies with Taguchi’s experimental results.  \nKeywords: pump impeller, performance enhancement, orthogonal array, design of experiments, signal–noise ratio, analysis of variance, response analysis, computational fluid dynamic analysis  \n1 LITERATURE REVIEW  \nThe design of hydraulic machinery involves a lot of parameters that are interdependent and, in turn, iterative, which makes the problem at hand more complex for the human brain to manipulate [1–3] . However, the innovation in computational fluid dynamic (CFD) field has made it possible to simulate and visualize some of the features of flow through rotating machines that would be difficult to measure experimentally [4–8] . The importance of pumps in hydraulic field had been sensed by mankind over the 20th and 21st centuries (see References) . The global market of today is flooded with plenty of varieties, types, and sizes of pumps. In spite of its age, even today the design of pumps has not  \n􀀁 Corresponding author: Department of Mechanical Engineering, Government College of Technology, No. 70, New Quarters, Coimbatore, Tamil Nadu 641 013, [India. email:](India. email:) m_natanuragct@ [yahoo.com](yahoo.com)  \nattained the saturation stage. In fact, pump design compatible with the production environment had been a major challenge to researchers. Particularly, researchers along with engineers had been striving to improve the design of impellers with the specific attention directed to enabling the enhancement of pump performance [9–11] . Li [12] formulated a method for analysing the performance of centrifugal oil pump, whereas Li etal. [13] analysed in their work the influence of a number of impeller blades on the performance of centrifugal oil pumps.  \nPerformance prediction procedures for centrifugal and axial flow turbomachines have been widely published by several researchers [14–18] since the early days of turbomachine design, whereas those for mixed flow machines are not well established in the open literature because of the industrial sources being classified as competition-sensitive by every industry. Sarkar [19, 20] presented the performance prediction method for a mixed flow impeller on the basis of the two-dimensional cascade theory, extending Howell’s [14] calculation for the analysis of axial  \nJPE184 \\# IMechE 2006 Proc. IMechE Vol. 220 Part A: J. Power and Energy  \nDownloaded from [pia.sagepub.com](pia.sagepub.com) at University of Bath-The Library on June 28, 2015  \nflow turbomachines. Oh and Chung [21] developed an automated design code to find the optimum values of design variables versus specific speed based on the mean streamline analysis for centrifugal pump. With the recently emerged powerful quality design t","cbCaieuxleNYThIy","https://ap.wps.com/l/cbCaieuxleNYThIy","pdf",1515550,18,"English","# Abstract\n# Literature Review\n## CFD and Design of Experiments Approach\n## Taguchi Orthogonal Arrays and Virtual Model Analysis","[{\"question\":\"What is the main objective of the study on the centrifugal pump impeller?\",\"answer\":\"The study aims to find an optimum impeller design and geometry that improves pump performance and functional reliability.\"},{\"question\":\"How does CFD contribute to the performance enhancement process?\",\"answer\":\"CFD analysis evaluates changes in flow patterns and streamline behavior at different operating conditions, helping connect impeller design deviations to performance effects.\"},{\"question\":\"What role does Taguchi’s method play in the research methodology?\",\"answer\":\"Taguchi’s orthogonal array-based design of experiments is used to determine near-optimal impeller parameters, which are then validated using CFD and compared with experimental predictions.\"}]","Optimizing impeller geometry for performance enhancement of a centrifugal pump - Taguchi quality concept | PDF",45]