aeronet 2 - workshop “measurement technology” - cluster lect vienne 19/20 sept. 2001 - technical...

AERONET 2 - workshop “Measurement Technology” - cluster LECT Vienne 19/20 Sept. 2001 - Technical Univ. O. Penanhoat - Snecma

ENSMA - Optical measurements / LES-4-LPP « ORACLES rig »

Digitization

Long exposure time40 10-3 sSymmetrical shape

Short exposure time (2 10-3 s)Symmetrical shape

LIF on OHvery short exposuretime : (100 10-9 s)

Pulsating behavior


QinetiQ - Fuel Injector Measurements / LowNox III

Measurement techniques and technology demonstrated:

• Internal gas species, smoke and temperature profile mapping

• 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

ASC combustor


High Pressure Fuel Injector Test Rig

Main features:

• 16 bar operating pressure

• Mean air flow velocity >100m/s

• Steady state operation

• Liquid can be kerosene or water

•Can study swirling and non-swirling flows

• Support high speed photography, laser light sheet and PDA techniques

Air in

Settling chamber

Fuelinjector

Workingsection with

optical windows

Exhaustchamber

Airmeter




PDA instrument and atomiser rig

0

20

40

60

80

100

120

-40 -30 -20 -10 0 10 20 30 40

X Position (mm)

Sa

ute

r M

ea

n D

iam

ete

r (

mm

)

Idle

Take off

Climb out

Cruise

Descent

Approach

-40

-20

0

20

40

60

80

100

120

-40 -30 -20 -10 0 10 20 30 40

X Position (mm)

U V

elo

city (

m/s

)

Idle

Take off

Climb out

Cruise

Descent

Approach

Generic fuel injector study in LOWNOXIII Programme

Laser light sheet flow

visualisation

Axial velocity of jet

Sauter mean diameter of

droplets


piezoelectricceramic

Vd

30µm < Dd < 400µm

2 < C0 = Sd / Dd < 7

Meteringghole

0

Liquid

Seal ringtorique

+-

Electricenergizer

~

Thermocouple

Onera - PDA on a stream of monosized droplets / LowNox III

Combustion chamber

« Parametric Study of Autoignition »


P=5 bar T=300K

0.3

0.4

0.5

0.6

0.7

0.8

0.9

1.0

0 0.5 1 1.5

Normalized droplets lifetime t/D02 (s/mm2)

(D10

/ D

0 )2

5 bar

10 bar

15 bar

20 bar

Série5

Linéaire(Série5)Slope -K

FLAME LENGTH VERSUS PRESSURE( Tair = 300 K ; Vair = 0.175 m/s )

FL (mm) = 430. P (bar) -0.67

R2 = 0.9957

0

20

40

60

80

100

120

140

160

0 5 10 15 20 25

Pressure (bar)

Fla

me

Len

gth

(m

m)

Onera - PDA on a stream of monosized droplets / LowNox III « Parametric Study of Autoignition »


Onera - Optical analysis of premixed injection systems / LowNox III « Autoignition & Flashback»

Performed : PDA, LDV, photoelectric cells


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

deconvolution

optical density vapour concentration profile

y r


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...

Documents

penanhoat snecma page

measurement techniques

chamber fuel injector

fuel spray experiments

generic fuel injector

onera pda

s pulsating behavior

pda techniques air