A New Approach to Designing the S-Shaped Annular Duct for Industrial Centrifugal Compressor

Yurko, I; Bondarenko, G. A.

doi:10.1155/2014/925368

Cited by 6 publications

(10 citation statements)

References 12 publications

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“…Hence, total pressure loss and non-uniformity of the flow are directly related to the slope (radial offset) and curvature of the S-shaped duct. An S-shaped duct design space is usually defined by the four main geometrical parameters like mean radius ratio ( R r ), an area ratio ( Ā r ), radial offset or slope ( ̄ ), and plane of inflection ( S ) [36]. Since an S-shaped duct acts as a transition component between low-and high-pressure compressor, inlet dimensions such as inlet hub radius ( R hi ), inlet shroud radius ( R si ), and inlet height (h inlet = R si − R hi ) are fixed by the existing upstream low-pressure compressor.…”

Section: Problem Definitionmentioning

confidence: 99%

“…The S-shaped duct is designed as per the design methodology described by Yurko and Bondarenko [36]. R SO and R ho are known as outlet shroud and hub radius, respectively, and can be calculated by solving Eqs.…”

Section: Problem Definitionmentioning

confidence: 99%

“…(3). Hub and shroud contours of the S-shaped duct are drawn by using third order parametric Bezier curve [36]; therefore, only four points are just sufficient to define the complete shape of the Bezier curve. Furthermore, both wall shape can be expressed in terms of the cubic curve using Cartesian coordinates (x, y) and a parameter 't' and represented by Eqs.…”

Section: Problem Definitionmentioning

confidence: 99%

See 2 more Smart Citations

Design optimization of S-shaped compressor transition duct using particle swarm optimization algorithm

Sharma

Baloni

2020

SN Appl. Sci.

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A high-bypass turbofan engine transfers air from low-to the high-pressure compressor through an S-shaped transition duct. Minimization of the total pressure loss and maximization of uniform flow are key factors to ensure the maximum performance of the S-shaped transition duct. The conventional design approach is time-consuming and does not guarantee an optimal solution. Hence, the present article is based on the application of optimization for the S-shaped compressor transition duct. The optimization is carried out on the basis of shape parameters to minimize objectives namely pressure loss coefficient and non-uniformity with the reduction of length of the S-shaped transition duct. The 2-D axisymmetric approach of computational fluid dynamics is used as a design tool for performance evaluation with optimization techniques. The simulation model is validated with the available experimental results of the literature. The correlation between the response and independent variables is established with the help of the second-order polynomial response surface methodology. Further, individual optimization is carried out for single-objective consideration using particle swarm optimization and gray wolf optimization algorithms. As the results of single-objective optimization depict the conflicts between both objectives, later optimization using multi-objective particle swarm optimization and multi-objective gray wolf optimization algorithms is carried out. The performance metrics are obtained and compared. The 'TOPSIS' method is applied to get best solution out of multiple solutions. The optimized duct reduced pressure loss coefficient and non-uniformity index by 28.14% and 43.33% with a reduction of 6.37% of length compared to baseline S-shaped duct.

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Section: Problem Definitionmentioning

confidence: 99%

Section: Problem Definitionmentioning

confidence: 99%

Section: Problem Definitionmentioning

confidence: 99%

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Design optimization of S-shaped compressor transition duct using particle swarm optimization algorithm

Sharma

Baloni

2020

SN Appl. Sci.

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“…where n is the order of Bezier curve. The main advantages of these curves are easy parametrization of contours, smooth curvature change, and the possibility of creating meridional contours of any shape using the minimum number of control points [19]. The third-order (cubic) Bezier curve was applied for setting the shape of the hub in hydrodynamic coupling.…”

Section: Meridional Shape Of Blade Hubmentioning

confidence: 99%

Design optimization of hydrodynamic coupling applying response surface method combined with CFD technique

Nejadali

2020

J Braz. Soc. Mech. Sci. Eng.

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Hydrodynamic coupling is a type of fluid machinery that uses fluid kinetic energy to transmit power. In this paper, meridional profile optimization of fully filled fluid coupling was performed to improve transmitted torque. The response surface method, a global optimization method, combined with CFD was introduced to find optimum meridional profile of blades. The torque coefficient was applied as an objective function. The response surface method was adopted with three design variables: hydraulic diameter ratio of blades, central core position, and meridional profile of the hub. Results showed that the best diameter ratio occurred at d/D =0.67. To specify an optimal position for the central core, a dimensionless parameter (b/d) was introduced. With regression analysis, it was found that the optimal point occurs at about b/d =0.37. It was confirmed with the results of contour and vector plots. Three types of curves (circular, elliptical, and cubic Bezier curve) were employed to optimize the meridional shape of blades. The circular curve was applied in the design of the hub in the reference geometry. Relative to the circular curve hub, the use of elliptic curve had no significant effect on the objective function. Two dimensionless parameters, l 1 /d and l 2 /d, were defined to investigate the effect of Bezier curves on the performance of hydrodynamic coupling. The optimum values for design variables of l 1 /d and l 2 /d were obtained 0.80 and 0.88, respectively.

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“…It is well known that total pressure loss and non-uniformity of the flow within the S-shaped duct are directly related to the slope (radial offset or length) and curvature. An S-shaped duct design space has four main geometrical parameters such as mean radius ratio R r , an area ratio Ā r , radial offset or slope ( ̄ ) and plane of inflection S [24]. An S-shaped duct is an intermediate component of low-and high-pressure compressor, hence inlet dimensions such as inlet hub radius R hi , inlet shroud radius R si and inlet height h inlet = R si − R hi are fixed by the existing upstream low-pressure compressor.…”

Section: Problem Definitionmentioning

confidence: 99%

Design optimization of a compressor transition S-shaped duct using a teaching–learning-based optimization algorithm

Sharma

Baloni

2019

J Braz. Soc. Mech. Sci. Eng.

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A high bypass turbofan aero-engine delivers compressed air from the low-pressure to the high-pressure compressor through a compressor transition duct. Weight and design space limitations impel to its S-shaped design. Despite that, the compressor transition duct has to guide the flow very carefully to the high-pressure compressor without disturbances and flow separations. Hence, the present paper is devoted to elaborate on the application of the proposed heuristic optimization technique known as multi-objective teaching-learning-based optimization (MO-TLBO) algorithm in the area of S-shaped transition compressor duct. The present algorithm is applied for obtaining the optimum design of the S-shaped duct while minimizing the total pressure loss coefficient and non-uniformity index at the S-shaped duct outlet. These objectives are also optimized independently and as a multi-objective consideration as well. Because of the conflicting nature of the objective functions, a Pareto-optimal curve is also presented for a successful trade-off between the objectives. Pareto-optimal curve gives flexibility to the designer for selecting the best set of the parameters based on the objectives. Successful execution of the proposed MO-TLBO algorithm is examined by comparing the optimum results acquired by the multi-objective genetic algorithm and comparisons divulge that the TLBO algorithm can be successfully practiced to obtain the optimized design of compressor transition S-shaped duct. Optimized duct shows the reduction in total pressure loss and non-uniformity by 28.80% and 36.67%, respectively, despite the reduction of 14.74% in overall length.

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A New Approach to Designing the S-Shaped Annular Duct for Industrial Centrifugal Compressor

Cited by 6 publications

References 12 publications

Design optimization of S-shaped compressor transition duct using particle swarm optimization algorithm

Design optimization of S-shaped compressor transition duct using particle swarm optimization algorithm

Design optimization of hydrodynamic coupling applying response surface method combined with CFD technique

Design optimization of a compressor transition S-shaped duct using a teaching–learning-based optimization algorithm

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