methodology development of air intake orifice noise prediction · conclusion & next steps next...
TRANSCRIPT
Page 1 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
Hüseyin Berk Özcan & Seçkin Kum
European GT-SUITE Conference 2018
08.10.2018
Methodology Development of Air Intake Orifice Noise Prediction
Page 2 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
OUTLINE
• Description of Work
• CAE Work Flow Chart
• Results
• Conclusion & Next Steps
Page 3 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
Description of Work
Page 4 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
AIR INTAKE SYSTEM & DYNO MEASUREMENTS & TRANSMISSION LOSS TEST
AirSt
ackp
ipe
Probe Type Microphone Three pressure
sensor with 120’ angle.
Intake orifice Microphone
Stackpipe Orifice Adaptor
Compressor inlet adaptor
GEM 3D
Page 5 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
TRANSMISSION LOSS CORRELATION
Cleaning CAD model at Hyper Mesh in order to
create proper model at Gem 3D
Importing part to GEM 3D and modelling porperly for
1D analysis
Convert 3D model to 1D model for Transmission
Loss Analysis
1D Transmission Loss Analyse Results Controlling with transmission loss test
results
• There are two major parts which are the most complex to be modeled.
• Stackpipe and air-cleaner box (ACB) have complex shape.
• About 150 iterations were done to obtain correlated stackpipe TL.
• 128 iterations were done for ACB correlation.
Page 6 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
TRANSMISSION LOSS BENCH SETUP
GEM3D
• CAD data is cleaned up and meshed by using HyperMesh Software.
Microphone
LocationsMicrophone
Locations
TL test bench is simulated on 1D Model.
Mean velocity ~ 1m/s
Velocity Amplitude ~ 0.1 m/s
• Then, discretized to 1D model by using GEM3D Soft.
CAD DATA HyperMesh
Page 7 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
CAE Work Flow Chart
Page 8 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
INTAKE ORIFICE NOISE GT-SUITE ROADMAP
Step-1 Step-2 Step-3
CAE correlation with
Trasmission Loss Test
Engine Performance Model
Correlation According to Dyno
Data which was taken from
Dyno.
Acoustic Correlation of
Engine Performance Model
According to Dyno Data
Stackpipe TL
Correlation
Air Cleaner
Box TL
Correlation
Acoustic
Compressor
Modelling
Step-4
Intake Orifice Noise
Correlation @3EO&@6EO
According to New
Dynamometer Data
Completed
New Test is awaited
Page 9 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
ION PREDICTION PHASE BY USING GT&LMS
LMS
LMS AIS Model
Probe Type Microphone
Test input from X1
Calibration Dyno
3EO&6EO of air intake orifice noise results can be
predicted at X1 phase with compressor inlet data which is
taken from calibration dyno.
GT Intake Orifice
Noise Prediction
Engine Performance
ModelGT AIS Model
3EO&6EO of air intake orifice noise results can be
predicted very early stages of program because engine
performance model could be used for acoustic pulsations
Page 10 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
Results
Page 11 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
STACKPIPE TRANSMISSION LOSS RESULT COMPARISON
GT & LMS results shows similar trends almost all frequency range but «Test» data only gives information about peak locations.
GT & LMS correlation (CAE to CAE) is observed for both software.
10 dB
0
10
20
30
40
50
60
0 50 100 150 200 250 300 350
dB
Frequency [Hz]
LMS GT Test
6EO Zone3EO Zone
Cut-off frequency of TL
test bench.
STACKPIPE
50 Hz
Page 12 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
AIS FULL SYSTEM CAE TO CAE TL COMPARISON
Cut-off frequency
of TL test bench.
6EO Zone3EO Zone
10 dB
60 Hz
Page 13 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
INTAKE ORIFICE NOISE PREDICTION
3EO ION Comparison GT&Test
40
45
50
55
60
65
70
75
80
85
800 1000 1200 1400 1600 1800 2000
dB
(A)
RPM
3EO Intake Orifice Noise CAE & Test Comparison
M1 Vehicle Results Dyno Test GT Results
5 dB
Compressor inlet pulsations could be different
than real values due to unknown compressor
inlet microphone location in dyno test.
GT results are decreasing while dyno test data
increase.This incompatibility could be occured
due to engine radiated noise effect.
100 rpm
Page 14 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
INTAKE ORIFICE NOISE COMPARISON
Compressor Inlet 3EO SPL Comparison
80
85
90
95
100
105
110
115
120
125
800 900 1000 1100 1200 1300 1400 1500 1600 1700 1800
dB
(A)
RPM
Compressor Inlet 3EO SPL Comparison Test vs CAE
Mic.5mm Distance from Center Test Mic.Pipe Center
CAE results are decreased after 1250rpm.
5 dB
100 rpm
Page 15 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
DYNO TEST RESULTS
Intake Orifice Noise With Different Microphone Locations
Changing microphone location has significant effect on sound pressure between 900-1300rpm range,
which means engine radiated noise is became more dominant after 1300 rpm.
Microphone is positioned at
25cm , 10cm and 5cm from
stackpipe orifice
5 dB100 rpm
dB
(A)
Page 16 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
Conclusion & Next Steps
Page 17 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
CONCLUSION & NEXT STEPS
TestedTested
Compressor is modelled as an acoustic
compressor and it is implemented to 1D engine
performance model in order to increase
correlation but, SPL at firing orders for the
current compressor geometry that gave no
added value as GT have seen that on other
engines. (studied with GT-Support)
Dyno test is required
with latest design
prototype of AIS in
order to increase
confidence level of
test data and to
achieve ION
correlation.
Page 18 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
CONCLUSION & NEXT STEPS
Next Steps
Engine
Compressor inlet pressure
pulsations values in model should
be matched with test data.
New test will be done by
considering compressor inlet
microphone location.
Engine encapsulation will be done
at dynamometer test in order to
isolate engine radiated noise from
intake orifice noise to obtain more
accurate results.
AIS
New transmission loss rig is
needed which has lower cut off
frequency (30Hz) in order to
measure more accurate AIS
transmission loss values at lower
frequency range.
If the 3EO pressure pulsations at
compressor inlet is not correct in
the GT Model, ION can be
compared back to back by using
different designs.
Page 19 of 18
Originator: bozcan3, skum, acetin8
Date: 8 October 2018
Herkese Açık | Public
19
Thank You!
Hüseyin Berk ÖZCANEngine Performance & Energy Management
Engineer
Seçkin KUMPT NVH Development
Engineer