Boles BULLETIN Sept 16 2013

International Scientific and Technical Conference September 21-25

SYPT‘15 – System.Pumps.Turbines Voronezh, Russia

Pump Inducer Design with CFturbo®

Аlexander Nikulin

Axis Engineering,

St.-Petersburg (Russia)

Gero Kreuzfeld

CFturbo Software & Engineering GmbH

Dresden (Germany)

www.cfturbo.com© CFturbo® Software & Engineering GmbH page 2

SYPT 2015Pump Inducer Design with CFturbo®

Content

CFturbo® company 3CFturbo® software 5Development process for Turbomachinery components 10Example: Rocket engine pump with inducer 12

Online CFturbo® Demo

www.cfturbo.com© CFturbo® Software & Engineering GmbH page 3

SYPT 2015Pump Inducer Design with CFturbo®

CFturbo® company – Overview

• CFturbo® Software & Engineering GmbHGerman company was established in September 2008

• Headquarter in Dresden, Munich office

• Distributors for key markets in Europe, China, India, Korea, UK, USA and Russia >> Axis Engineering, St. Petersburg

• 20 employees

• Full engineering supplier for Conceptual Turbomachinery Design Software, related CAE-consulting, CAD-services and prototyping

www.cfturbo.com© CFturbo® Software & Engineering GmbH page 4

SYPT 2015Pump Inducer Design with CFturbo®

CFturbo® company – Business Areas

CFturbo® Software & Engineering GmbH

Engineering CAD & Prototyping

• Turbomachinery Design

• CFD/FEA Simulation

• Optimization

• 3D-CAD

• Prototyping

• Testing

CFturbo® Software

• Conceptual Design Software

• Automated Workflows

www.cfturbo.com© CFturbo® Software & Engineering GmbH page 5

SYPT 2015Pump Inducer Design with CFturbo®

• CFturbo® is a modern, powerful and very user-friendly software toolfor Conceptual Turbomachinery Design

• Impeller typesRadial & mixed-flow, Axial

• Blade shapes3D, 2D, Circular, Ruled surface,Radial elements, Helical, …

• On the market since 2005

• More than 120 active clientsaround the globe

CFturbo® Software

ImpellerStatorsVolutes

for

PumpsVentilatorsCompressorsTurbines

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SYPT 2015Pump Inducer Design with CFturbo®

CFturbo® Software – Examples Pumps

Axial Mixed-flow Radial (with inducer)

www.cfturbo.com© CFturbo® Software & Engineering GmbH page 7

SYPT 2015Pump Inducer Design with CFturbo®

CFturbo® Software – Example Radial Pump Stage with Return Channel

www.cfturbo.com© CFturbo® Software & Engineering GmbH page 8

SYPT 2015Pump Inducer Design with CFturbo®

CFturbo® Software – Examples Compressors & Turbines

Compressor withruled surface blades

Turbine (VTG) withradial element blades

Axial turbine(rotor & stator)

www.cfturbo.com© CFturbo® Software & Engineering GmbH page 9

SYPT 2015Pump Inducer Design with CFturbo®

CFturbo® Software – How it works

CFturbo®

New / improved3D geometry

Fundamental fluid equationsBernoulli, Euler equation,

Mass, Momentum , Energy conservation,

Velocity triangles, …

Empirical functionsPublicly available knowledge,

In-house know-how;Can be customized…

Existing, externalgeometry

Reference geometryfrom CFturbo

Machine design pointm, H/Δp, RPM,

Fluid properties,Inlet conditions

www.cfturbo.com© CFturbo® Software & Engineering GmbH page 10

SYPT 2015Pump Inducer Design with CFturbo®

Development process for Turbomachinery components

Design Simulation & Validation Product

ConceptualDesign

CFturbo®

MeshingANSA, AutoGrid, ANSYS,Pointwise, TurboGrid, …

3D-CADCATIA, Creo, Inventor, NX,SolidWorks, SpaceClaim, …

ProductOptimizationinteractiv or automatic

ExperimentsRapid Prototyping,Testing, Validation

CFD/FEA SimulationSTAR-CCM+, ANSYS-CFX,FINE/Turbo, PumpLinx, …

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SYPT 2015Pump Inducer Design with CFturbo®

Interfaces to important CFD-codes for Turbomachinery simulation

Create seamless interfaces to allow automated workflows and optimization

ANSYS ANSYS-CFX

Numeca FINE/Turbo

STAR-CCM+

Simerics MP/ PumpLinx

FloEFD

ANSYS Meshing

AutoGrid, HexPress

CD-adapco

Simerics

Mentor Graphics

[Open Source]

CFturbo®

… ……

Conceptual Design Meshing Simulation

OpenFOAMSnappy HexMesh

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SYPT 2015Pump Inducer Design with CFturbo®

Example: Interface CFturbo® – PumpLinx

PumpLinx• Automated binary-tree mesh• Cartesian mesh based on

closed surface models (STL)• Very fast CFD-Solver• Direct simulation start

from CFturbo

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SYPT 2015Pump Inducer Design with CFturbo®

Example: Rocket engine pump with inducer (PumpLinx)

662m3/h

662m3/h

800m3/h

Velocity Static Pressurem/sPa

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400m3/h

700 m3/h

600m3/h

800m3/h

Example: Vapor fraction area simulation (PumpLinx)

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0

20

40

60

80

100

120

140

160

300 400 500 600 700 800 900

To

tal

pre

ssu

re d

iffe

ren

ce [

bar]

Flow rate [m3/h]

TRWC_500k_3bar TRWC_1Mio_1.77bar

TRWC_1Mio_3bar STNC_1Mio_1.77bar

STNC_1Mio_3bar STNC_500k_3bar_LOX

STNC_2Mio_1.77bar STNC_2Mio_3bar

Example: Performance curves with cavitation modeling (PumpLinx)

Tota

l pre

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re d

iffe

ren

ces

wer

e co

mp

ute

d b

etw

een

ind

uce

r in

let

and

vo

lute

ou

tlet

WITHOUTCAVITATION

WITH CAVITATION

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SYPT 2015Pump Inducer Design with CFturbo®

Online CFturbo® Demo – Conceptual Design of an Inducer Pump

Design Point Defintion

Dp = 185 barQ = 200 m³/hn = 30 000 rpmFluid : Water