Transcript planches tupolev - uni

ENSMA - Optical measurements / LES-4-LPP
« ORACLES rig »
Long exposure time
40 10-3 s
Symmetrical shape
Short exposure time
(2 10-3 s)
Symmetrical shape
Pulsating
behavior
LIF on OH
very short exposure
time : (100 10-9 s)
Digitization
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Page 1
QinetiQ - Fuel Injector Measurements / LowNox III
Measurement techniques and
technology demonstrated:
• Internal gas species, smoke and
temperature profile mapping
ASC combustor
• Combustor wall heat flux and smoke
measurements
• Combustion instability detection using
high frequency response transducers
• Enhanced convective cooling tiles on
combustor walls provided effective wall
cooling
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Page 2
QinetiQ - Fuel Injector Measurements / LowNox III
Air
meter
Main features:
• 16 bar operating pressure
Working
section with
optical
windows
Air in
• Mean air flow velocity >100m/s
• Steady state operation
• Liquid can be kerosene or water
•Can study swirling and non-swirling
flows
Settling
chamber
Fuel
injector
• Support high speed photography, laser
light sheet and PDA techniques
Exhaust
chamber
High Pressure Fuel Injector Test Rig
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Page 3
QinetiQ - Fuel Injector Measurements / LowNox III
Generic fuel injector
study in LOWNOXIII
Programme
PDA instrument and atomiser rig
Laser light sheet flow
visualisation
120
120
100
100
80
60
Idle
Take off
Climb out
Cruise
60
Descent
Approach
Idle
U Velocity (m/s)
Sauter Mean Diameter ( mm)
80
Take off
Climb out
40
Cruise
Descent
Approach
20
40
0
-40
20
-30
-20
-10
0
10
20
30
40
-20
-40
0
-40
-30
-20
-10
X Position (mm)
0
10
20
30
40
X Position (mm)
Axial velocity of jet
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Sauter mean diameter of droplets
Page 4
Onera - PDA on a stream of monosized droplets / LowNox III
« Parametric Study of Autoignition »
Combustion chamber
Vd
2 < C0 = Sd / Dd < 7
30µm < Dd < 400µm
Metering
ghole  0
+
-
Seal ring
torique
piezoelectric
ceramic
Thermocouple
~
Liquid
Electric
energizer
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Page 5
Onera - PDA on a stream of monosized droplets / LowNox III
« Parametric Study of Autoignition »
1.0
P=5 bar T=300K
5 bar
10 bar
0.9
15 bar
(D10 / D0 )2
0.8
20 bar
Série5
0.7
Linéaire
(Série5)
Slope
-K
0.6
0.5
0.4
0.3
0
0.5
1
1.5
2
Normalized droplets lifetime t/D0 (s/mm2)
FLAME LENGTH VERSUS PRESSURE
( Tair = 300 K ; Vair = 0.175 m/s )
160
140
FL (mm) = 430. P (bar)
Flame Length (mm)
120
-0.67
2
R = 0.9957
100
80
60
40
20
0
0
5
10
15
20
25
Pressure (bar)
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Page 6
Onera - Optical analysis of premixed injection systems / LowNox III
« Autoignition & Flashback»
Performed : PDA, LDV, photoelectric cells
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Page 7
ITS Karlsruhe - IR extinction for fuel spray experiments / LowNox III
Development of a measurement technique
• design of optical setup
• development of a tomographic deconvolution algorithm for circular cross-sections
vapour concentration profile
optical density
deconvolution
r
y
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Page 8
ITS Karlsruhe - IR extinction for fuel spray experiments / LowNox III
local concentrations of gaseous kerosene in a premix-duct :
• influence of temperature on fuel evaporation
• Influence of fuel type on local air fuel ratio
AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ.
O. Penanhoat - Snecma
Page 9