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文库首页行业研究行业报告FLUENT Rotating Machinery Analysis-07 Post Processingg.pdf

FLUENT Rotating Machinery Analysis-07 Post Processingg.pdf

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FLUENT Rotating Machinery Analysis-07 Post Processing

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Tb P t iTb P t i

process

Advanced FLUENT CFD TrainingAdvanced FLUENT CFD Training

ANSYS, Inc. Proprietary

FLUENT User Services Center

www.FLUENTusers.com

Advanced FLUENT Training v6.3

Rotating Machinery July 2008

Overview



c post-

rocess

z Surface and volume integrals

z Torques, forces, and power

z Contour and vector plotting

z Particle paths

 Turbo-specific post-processing in FLUENT

z Turbo topology

z Turbo coordinates

z Turbo post-processing tools

7-2

ANSYS, Inc. Proprietary

FLUENT User Services Center

www.FLUENTusers.com

Advanced FLUENT Training v6.3

Rotating Machinery July 2008

Surface and Volume Integrals

Sf d l



ace an

ume

integrals provide basic

quantitative analysis of

rotating machinery CFD

rotating

machinery

CFD

solutions

 Compute averages, fluxes,

min max and integral

min

max

and

integral

sums for any field function

on any cell / boundary zone

or isosurface

isosurface

 Calculations can be

automated through journal

files

7-3

ANSYS, Inc. Proprietary

files

FLUENT User Services Center

www.FLUENTusers.com

Advanced FLUENT Training v6.3

Rotating Machinery July 2008

Torques and Forces

FR idi d



orce

eports prov

ntegrate

forces and moments on zone

surfaces

Rbd



otor torque can

e compute

the moment component aligned

with the axis vector as follows:

Sl t ll t ll

or wa

zones

z Set Moment Center to rotational

axis origin

Print moment vector and take dot

moment

vector

and

take

dot

product with rotational axis

vector

7-4

ANSYS, Inc. Proprietary

⋅=

FLUENT User Services Center

www.FLUENTusers.com

Advanced FLUENT Training v6.3

Rotating Machinery July 2008

Computing Rotor Power

Rihdf



otor power

s t

e pro

uct o

the rotor torque and the

rotational speed

 Sign convention

= TorquePowe

z Positive value indicates that

the fluid is supplying energy

to the rotor (e.g. turbine)

N i l i di h

egat

ve va

cates t

the rotor is supplying energy

to the fluid (e.g. compressor

Example: Rotor 37 Axial Compressor

axis = + z

tor

(

1 blade

)

= +23.315 N·m

7-5

ANSYS, Inc. Proprietary

pp)

q( )

speed = -1800 rad/sec

power (1 blade) = -41.967 kW

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