SLIDE 1
SLIDE 2 Industries stries & A Applic licat ations ions
Aerospace
- High Lift Devices
- Landing Gear
- ECS
- Jet and turbo noise
Automotive
- Wing mirror
- Sunroof noise
- HVAC systems
- Turbo chargers
- Cooling fans
- Exhaust systems
- Interior transmission
Building Environment
Electronics cooling
- Fan noise
- Air conditioning
Power Generation
- Pipe / duct / cavity resonances
- Compressor / turbine / combustor
Marine
- Propeller noise
- Cavitation
- Hull/propeller/rudder interaction
SLIDE 3 STAR-CCM+ CM+ Aeroac acoust
ics Capabilit bilities ies
Flow & Propagation
CURLE (Surface) PROUDMAN (volume) GOLDSTEIN (2D-axisymertric) LEE Analogy LILLEY Analogy FW-H Tonal blade passing
LES DES
FW-H Propagation
Simulation Options
Steady state Unsteady
Broadband Correlations Synthesized Direct Direct Simulation of Noise Propagation
Steady-state and Transient Post- Processing
Mesh Frequency Cut-off Point & Surface FFTs Point & Surface Inverse FFTs Direct export to Acoustics and SEA codes
Aeroacoustics
Band Stop & Pass Filters and Finite Impulse Response (FIR) Wave-number analysis including Cross Spectral Analysis for Phase and Coherence Uniform grid mapping and Export to MATLAB Non-conformal mapping to structures codes
Compressible Non-reflective Turbulence
SLIDE 4
HVAC, C, ECS, S, Duct t ventilation ilation and disc schar arge ge
AIAA2012-2068
SLIDE 5 Deba bati tin, , K, EC ECCOMA MAS S CFD 2006 2006
ECS S and electr tronic
ling
Elbow with flow straightener Plenum Inlet Bulk Velocity Outlet Pressure on all holes on each shelve Restrictor
SLIDE 6 Deba bati tin, , K, EC ECCOMA MAS S CFD 2006 2006
ECS S and electr tronic
ling
SLIDE 7 Deba bati tin, , K, EC ECCOMA MAS S CFD 2006 2006
ECS S and electr tronic
ling
SLIDE 8 Deba bati tin, , K, EC ECCOMA MAS S CFD 2006 2006
ECS S and electr tronic
ling
SLIDE 9 Ext xtern ernal al Aeroa
coust ustic ic Excitation itation and Intern ernal al Noise se Tran ansm smission ission (also, lso, see later) er)
Surface FFT (dB) at 500Hz (top) and 1000Hz (bottom)
AIAA2012-2205 AIAA2012-2206 SAE2013-01-0640
SLIDE 10
Turbo bo compressor ressor Noise se
GT2012-70028
SLIDE 11 HVAC C – blower er, , distr tribu ibutor
, ducts, s, flaps ps
SAE13-01-0856
SLIDE 12 Pipe e net etwor
k singing ging
AIAA2012-2171
SLIDE 13 Sunroo
f/side-windo window w buffeti eting g – real l vehicle le effects ts
Uncorrected Correlated
Alumin iniu ium Persp rspex MDF
– Wall compl mplian ance ce effec ects ts
mplian ant t wal walls s (above right) ght)
relati tions ns for wal wall comp mplianc nce e (below right ht)
– Leaka kages ges
SAE2013-01-1012
SLIDE 14 Acoust stic ic Tramsmission amsmission Loss s - muffler flers
L lextruded Douter Dinner
1D GT-POWER STAR-CCM+ (unfiltered) STAR-CCM+ (low pass filter) Transmission Loss (dB)
Pure Acoustical Transmission Loss
– Including porous media – In the presence of flow Productio
t by y InDeS eSa Ideali ealise sed d geome
try test by CD-ada adapco
SLIDE 15 Aerospa
ce: : Airframe frame and Jet et noise se
SLIDE 16
Traili ailing ng edge self lf noise se @ Re ~ 2x105
SLIDE 17
Propeller peller noise se – vortex x wake e interaction eraction
SLIDE 18 Hydroac
– Sound propagation in compressible liquid media – Multi-phase phenomena (bubble growth/collapse) – Hull boundary layer noise with LES (Re~107-108)
SLIDE 19 Focus s on Transient ansient and Aeroa
coustics
– LES-type turbulence model
tions
maras as, , k-ε, k-ωSST)
tion n scheme blendi ding ng
wall resolved) ed)
– Advanced wall treatment
nsens nsitive
– Non-reflecting boundaries for ideal gases – Acoustic far-field damping in compressible liquids – Full Compressibility
eracti ction n bet etween the flow and acoustics stics
– Espec ecia ially lly for cavi vity ty /duct t reson sonanc ances es
– Efficient implicit transient solver
nd order
r space and time discreti scretisati sation
– Spectral Analysis
nts and surfac aces es
ss spectra ctra – coherence nce and phase se
quency ncy and Wave Number r Fouri rier r analysis sis
SLIDE 20 Direct ect Propagat pagation ion in STAR-CC CCM+
– Mesh requirement
- 20 cells per acoustic wavelength ( λ= c / f )
– In ambient air, you need cells of ~15mm to propagate a signal at 1000Hz – Domain size = 1000D, (~10 λ ) – Double precision code
– Ideal-gas non-reflective in/outflow boundaries – Compressible liquid far-field acoustic reflecting-avoidance treatments
SLIDE 21 – STAR results capture the acoustic sources for propagation via
wkings ngs (far-field eld pro ropagati tion n of compact sources) – STAR offers coupling to 3rd party propagation codes:
AN
, Virtu tual.L al.Lab.A .Acou
tics
– Aero-VibroAcoustics
ng FVS in STAR-CC CCM+
t to SEA and FEA
100 0 Hz 500 0 Hz 3150 50 Hz Over erall all
Propagat pagation ion – FW FW-H H and 3rd
rd party
ty code expor
SLIDE 22 Introdu
ction to 1D (line) ine) WaveNumber mber Analysis ysis
Φc(k,ѡ)
ѡ k k0=ѡ/c0 kc=ѡ/Uc
Φ0 (k, ѡ)
Φc(k,ѡ)
ѡ k k0=ѡ/c0 kc=ѡ/Uc
Φ0 (k, ѡ)
Bremne mner and Wilby AIAA-200 2002-255 2551
Wave venumber (rad/m) /m)
SLIDE 23 1D wave number er analysis lysis on attac ached hed and separat arated ed zones es
a+ a- u- a+ a- u+
AIAA2012-2205 AIAA2012-2206 SAE2013-01-0640
SLIDE 24
2D wave number er analysis lysis at disc scre rete e freque uencies cies
Convectiv ctive e ridge ge Ac Acoustic tic circl cle
SLIDE 25
Separat arating g the acoustic stic conten ent
SLIDE 26
Total al and acoust stic ic power input ut to vibrat ration ion analysis ysis
SLIDE 27 Widely dely applicable able modellin
g for flow w noise se predic dicti tion
Continued ntinued invest stment ent towar ards ds
– answering current needs – driving future expectations
in n Aeroacous
ics and towar ards ds AeroV
ibroacou
stics ics THA HANK NK YOU OU for your ur KIND ND ATTEN ENTION TION
Summa mmary
SLIDE 28
