An Investigation of the Flow and Global Performance in a Water-Jet Axial Flow Pump Based on CFD and Inverse Design Method

Volume 1: Symposia, Parts A and B ◽

10.1115/fedsm2005-77116 ◽

2005 ◽

Author(s):

Hong Gao ◽

Wanlai Lin ◽

Fangming Ye

Keyword(s):

Flow Field ◽

Radial Distribution ◽

Axial Velocity ◽

Design Method ◽

Water Jet ◽

Design Flow ◽

Inverse Design ◽

Cfd Modeling ◽

Global Performance ◽

Inverse Design Method

A new inverse design method based on non-constant distribution of circulation and axial velocity along the radial direction is used to design a pump impeller and a stator. The radial distribution of axial velocity at the design flow rate is calculated when an empirical radial distribution of circulation is given. CFD modeling of the global performance and the detailed flow field is performed using TASCflow software. A standard k-ε turbulence model combined with standard wall functions is used. A special mixing plane approach is employed to simulate the rotator-stator coupling flow field. The global performances of the water-jet pump, the radial distribution of velocity components at the exit of the impeller are also measured. Good agreement of the global performance, such as the pressure rise, the power and the efficiency, between CFD and experiment is obtained. The detailed velocity fields from inviscid analysis, CFD and experiment are compared and investigated.

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A Compressible Three-Dimensional Inverse Design Method Based on the Streamline Curvature Approach and Clebsch Formulation for Radial and Mixed Flow Turbomachines

Volume 3: Thermal-Hydraulics; Turbines, Generators, and Auxiliaries ◽

10.1115/icone20-power2012-54805 ◽

2012 ◽

Author(s):

Xiao Pei Tian ◽

Peng Shan

Keyword(s):

Flow Field ◽

Inverse Method ◽

Design Method ◽

Inverse Design ◽

Periodic Flow ◽

Mixed Flow ◽

3 Dimensional ◽

Streamline Curvature ◽

Through Flow ◽

Inverse Design Method

The through-flow inverse design method based on the streamline curvature approach is nowadays a widely used quasi-3-dimensional blades design method for radial and mixed flow turbomachines. The main limitation of this method is using the flow field on the mean stream surface S2,m to approximate the actual 3-dimensional flow field. Without an effective description of the periodic flow, it is impossible for this method to realize exactly the prescribed circumferentially averaged swirl rVθ. Is there any way to develop this classical through-flow inverse method to a 3-dimensional one conveniently? The answer is yes. A new compressible 3-dimensional inverse design method for radial and mixed flow turbomachines is presented in this paper. This new 3-dimensional inverse method provides a convenient and effective way to obtain the periodic flow field for the streamline curvature through-flow inverse method. Meanwhile, compared with another type of similar 3-dimensional inverse method firstly described by Tan etc. based on Stokes stream functions and Monge potential functions from the Clebsch formulation to calculate the circumferentially averaged flow and the periodic flow respectively, this new method has its own advantages. In order to assess the usefulness of the new method, four centrifugal impellers are designed under the same design specifications by four different inverse methods respectively. They are two quasi-3-dimensional streamline curvature through-flow inverse methods without and with a slip factor model, a 3-dimensional approximated inverse approach based on stream functions and Monge potential functions and the 3-dimensional inverse method presented here. The performances of the four impellers yielding from a RANS commercial solver are compared. The capabilities of the four methods to realize the target circumferentially averaged swirl are also studied.

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Matching Optimization of a Mixed Flow Pump Impeller and Diffuser Based on the Inverse Design Method

Processes ◽

10.3390/pr9020260 ◽

2021 ◽

Vol 9 (2) ◽

pp. 260

Author(s):

Mengcheng Wang ◽

Yanjun Li ◽

Jianping Yuan ◽

Fareed Konadu Osman

Keyword(s):

Flow Field ◽

Design Method ◽

Inverse Design ◽

Pump Efficiency ◽

Optimization Strategy ◽

Mixed Flow ◽

Pump Impeller ◽

Circulation Distribution ◽

Inverse Design Method ◽

Flow Pump

When considering the interaction between the impeller and diffuser, it is necessary to provide logical and systematic guidance for their matching optimization. In this study, the goal was to develop a comprehensive matching optimization strategy to optimize the impeller and diffuser of a mixed flow pump. Some useful tools and methods, such as the inverse design method, computational fluid dynamics (CFD), design of experiment, surrogate model, and optimization algorithm, were used. The matching optimization process was divided into two steps. In the first step, only the impeller was optimized. Thereafter, CFD analysis was performed on the optimized impeller to get the circulation and flow field distribution at the outlet of the impeller. In the second step of optimization, the flow field and circulation distribution at the inlet of the diffuser were set to be the same as the optimized impeller outlet. The results show that the matching optimization strategy proposed in this study is effective and can overcome the shortcomings of single-component optimization, thereby further improving the overall optimization effect. Compared with the baseline model, the pump efficiency of the optimized model at 1.2Qdes, 1.0Qdes, and 0.8Qdes is increased by 6.47%, 3.68%, and 0.82%, respectively.

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On the role of three-dimensional inverse design methods in turbomachinery shape optimization

Proceedings of the Institution of Mechanical Engineers Part C Journal of Mechanical Engineering Science ◽

10.1243/0954406991522167 ◽

1999 ◽

Vol 213 (1) ◽

pp. 27-42 ◽

Cited By ~ 20

Author(s):

M Zangeneh ◽

A Goto ◽

H Harada

Keyword(s):

Flow Field ◽

Inverse Method ◽

Design Method ◽

Three Dimensional ◽

Design Guidelines ◽

Secondary Flows ◽

Inverse Design ◽

Vaned Diffuser ◽

Oil Flow ◽

Inverse Design Method

The application of a three-dimensional (3D) inverse design method in which the blade geometry is computed for a specified distribution of circulation to the design of turbomachinery blades is explored by using two examples. In the first instance the method is applied to the design of radial and mixed flow impellers to suppress secondary flows. Based on our understanding of the fluid dynamics of the flow in the impeller, simple guidelines are developed for input specification of the inverse method in order to systematically design impellers with suppressed secondary flows and a more uniform exit flow field. In the second example the method is applied to the design of a vaned diffuser. Again based on the understanding of the detailed flow field in the diffuser obtained by using 3D viscous calculations and oil flow visualizations, simple design guidelines are developed for input specification to the inverse method in order to suppress corner separation. In both cases the guidelines are verified numerically and in the case of the diffuser further experimental validation is presented.

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Suppression of Secondary Flows in a Mixed-Flow Pump Impeller by Application of 3D Inverse Design Method: Part 1 — Design and Numerical Validation

Volume 1: Turbomachinery ◽

10.1115/94-gt-045 ◽

1994 ◽

Cited By ~ 1

Author(s):

M. Zangeneh ◽

A. Goto ◽

T. Takemura

Keyword(s):

Flow Field ◽

Design Method ◽

Secondary Flows ◽

Inverse Design ◽

Experimental Comparison ◽

Suction Surface ◽

Mixed Flow ◽

Pump Impeller ◽

Inverse Design Method ◽

Flow Pump

This paper describes the design of the blade geometry of a medium specific speed mixed flow pump impeller by using a 3D inverse design method in which the blade circulation (or rVθ) is specified. The design objective being the reduction of impeller exit flow non-uniformity by reducing the secondary flows on the blade suction surface. The paper describes in detail the aerodynamic critria used for the suppression of secondary flows with reference to the loading distribution and blade stacking condition used in the design. The flow through the designed impeller is computed by Dawes viscous code, which indicates that the secondary flows are well suppressed on the suction surface. Comparison between the predicted exit flow field of the inverse designed impeller and a corresponding conventional impeller indicates that the suppression of secondary flows has resulted in substantial improvement in the exit flow field. Experimental comparison of the flow fields inside and at exit from the conventional and the inverse designed impeller is made in part 2 of the paper.

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An investigation of the flow and overall performance in a water-jet axial flow pump based on computational fluid dynamics and inverse design method

Proceedings of the Institution of Mechanical Engineers Part A Journal of Power and Energy ◽

10.1243/09576509jpe476 ◽

2008 ◽

Vol 222 (5) ◽

pp. 517-527 ◽

Cited By ~ 1

Author(s):

H Gao ◽

W L Lin ◽

Z H Du

Keyword(s):

Fluid Dynamics ◽

Computational Fluid Dynamics ◽

Design Method ◽

Axial Flow ◽

Water Jet ◽

Inverse Design ◽

Overall Performance ◽

Inverse Design Method ◽

Axial Flow Pump ◽

Flow Pump

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Suppression of Secondary Flows in a Mixed-Flow Pump Impeller by Application of Three-Dimensional Inverse Design Method: Part 1—Design and Numerical Validation

Journal of Turbomachinery ◽

10.1115/1.2836700 ◽

1996 ◽

Vol 118 (3) ◽

pp. 536-543 ◽

Cited By ~ 42

Author(s):

M. Zangeneh ◽

A. Goto ◽

T. Takemura

Keyword(s):

Flow Field ◽

Design Method ◽

Three Dimensional ◽

Secondary Flows ◽

Inverse Design ◽

Suction Surface ◽

Mixed Flow ◽

Pump Impeller ◽

Inverse Design Method ◽

Flow Pump

This paper describes the design of the blade geometry of a medium specific speed mixed flow pump impeller by using a three-dimensional inverse design method in which the blade circulation (or rVθ) is specified. The design objective is the reduction of impeller exit flow nonuniformity by reducing the secondary flows on the blade suction surface. The paper describes in detail the aerodynamic criteria used for the suppression of secondary flows with reference to the loading distribution and blade stacking condition used in the design. The flow through the designed impeller is computed by Dawes’ viscous code, which indicates that the secondary flows are well suppressed on the suction surface. Comparison between the predicted exit flow field of the inverse designed impeller and a corresponding conventional impeller indicates that the suppression of secondary flows has resulted in substantial improvement in the exit flow field. Experimental comparison of the flow fields inside and at exit from the conventional and the inverse designed impeller is made in Part 2 of the paper.

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Design Optimization of Strongly Interacting Diffuser Pump Stage

ASME-JSME-KSME 2011 Joint Fluids Engineering Conference: Volume 1, Symposia – Parts A, B, C, and D ◽

10.1115/ajk2011-05019 ◽

2011 ◽

Author(s):

Mehrdad Zangeneh ◽

Kasra Daneshkhah

Keyword(s):

Flow Field ◽

Design Optimization ◽

Design Method ◽

Inverse Design ◽

Centrifugal Impeller ◽

Strongly Interacting ◽

Pump Stage ◽

Inverse Design Method ◽

Stage Efficiency

In this paper the flow field in a diffuser pump stage consisting of a centrifugal impeller and a radial diffuser is investigated by using unsteady computations. The time-averaged unsteady results are used to understand the main sources of loss in the stage. Then 3D inverse design method used to redesign the impeller and diffuser blades in order to improve the stage efficiency.

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