喷雾,液滴中液滴速度,喷雾液滴粒径检测方案(干涉仪)

THREE-DETECTORAPPROACH Spray Interactions With Turbulence First PDPAdeveloped andbuilt by W.D.Bachalo andM.J. Houser. AMCOX 品 智滤 AEROMETRICB， INC ( 2. 1983. IRM II II Schematic of Phase Doppler Optics Transmitter Lens Beamsplitter Invention of the PDPA.W.D.Bachalo 1982.Receiver Lens Laser -= 0 Probe Volume Frequency and PhaseSignal Processor Photodetectors 012 MEASUREMENT DETECTORS013 MEASUREMENT DETECTORS 360 PHASE D1D2 D3 180 d1 DIAMETER DetectorArrangement NUMBER ACTUAL SIZE DISTRIBUTION lln DIAMETER Invention of the 3Ddetector approachfor extending the NUMBER MEASURED SIZE DISTRIBUTION measurement range and signal validation， lm W.D. Bachalo 1982. DIAMETER PDI SIGNAL PROCESSING： Not all signals are easy to detect and process Signals produced by small particles and particles passing near theedge of the beam will have low SNR ·Burst detection and signal processing systems based on SNR are ableto detect and recover these signals using their unique sinusoidalcharacter ·Being able to detect and measure all drops maintains the dynamicrange capability 中州w. -15 Invention of digital signal detection methods for reliable detection and processing of Doppler signals， K. Ibrahim and W.D. Bachalo 1989. VARIATION OF THE SAMPLE VOLUMEWITH DROP SIZE First recognition of the need to correct theGaussian Beam Effectsampling statistics for the change in sampleCauses a change in the effectivevolume with drop size (probe volumesampling cross-section as acorrection， PVC)，W.D.Bachalo and M.J.function of drop sizeHouser，1984.Must be accuratelycharacterized to normalize theLASER BEAMsampling statisticslNTENSITY PROFILEPartially achieves desired affectof reducing sample volume sizewith decreasing drop sizeComplicates definitionof samplingcross-sectionalarea Drop Drag in a Polydispersion Drag Correlation Validations First measurements of droplet drag in a turbulent spray flowenvironment， R. Rudoff， S.V. Sankar， and W.D. Bachalo 1988. Size Velocity Correlation Diameter， um First measurements of particle response in a turbulent spray flow， S.V. Sankar， R. Rudoff， and W.D. Bachalo 1989. Droplet Response to Turbulence 1.1 x/D=7.r=0 Re=50，000 0.9 Urms Velocitv Vrnms Velocity 0.7 0.5 0.3 0.1 0 4 8 12 16 20 24 28 Diameter (micrometersl First measurements of particle response in a turbulent spray flow， S.V. Sankar， R. Rudoff， and W.D. Bachalo 1989. First measurements of time-dependant behavior of sprays in a turbulent flow， W.D. Bachalo， R. Rudoff， and S.V. Sankar 1988. Spray Flame Measurements Using the PDPA Spray flame measurements at Sandia National Laboratories using anAerometrics PDPA. C. Edwards. R. Rudoff， and W.D. Bachalo 1990. Spray Flame Configuration Understanding the pointmeasurement response ofparticle clusters passing thesamplevolume (Eulerianreference frame). Understanding complex spraybehaviorin aswirl stabilizedflame using anAerometrics PDPA， W.D. Bachalo 1988. Rainbow First use of the rainbow angle to measure the temperature ofindividual drops in a spray flame， W.D. Bachalo 1992. Solid-cone pressure atomizerwith a flow rate of 0.5 ： Uncontined and non-swirled. Boiling point of hexadecane isabout 287 deg. C. Spray flame measured usingthe integrated RainbowThermometer and PDPAS.V.Sankar and W.D. 3 2.5 2 1.5 0.5 0 Bachalo1992. Figure shows the dependence of droplettemperature on dropletdiameter for aparticular axial velocity. The solid lines aresecond order regressionfits. Larger drops havelower temperature thansmaller drops. First simultaneous measurements of drop size，velocity， and temperature in aspray flame， S.V. Sankar and Diameter (microns W.D. Bachalo 1994. Figure shows thedependence of droplettemperature on dropletvelocity for a specificdroplet size class. Solid lines are secondorder regression fits. Fast moving droplets havelower temperature thanslow moving droplets. First simultaneousmeasurements of drop size， velocity， andtemperature in a sprayflame， S.V. Sankar and W.D.Bachalo 1994. (~25msec) Velocity (m/s) ~6msec Aircraft Icing Probe in the NASA Icing Research Tunnel Aerometrics PDPA Flight Probe in the NASA IcingResearch Tunnel. E.J. Bachalo， S.V. Sankar， and W.D. Bachalo 1988 1D-PDPA Icing probe installed atBF Goodrich Aircraft Icing Wind Tunnel First PDPA Flight Probe for Aircraft IcingTunnel Spray measurements， W.D.Bachalo， E.J. Bachalo， and S.V. Sankar 1988. Dual 1D-PDPA Icing probes First Planar Optical Patternator developed for fuel injector spray characterization， S.V.Sankar and W.D. Bachalo 1994. Images obtained by Mie scattering and fluorescence 20304050607080 90100 Fluorescence and Mie Scattering images of the spray used to obtain D S.V. Sankar and W.D.Bachalo 1994. 1.01.21.41.61.82.02.22.42.6 Division color table Radial variation of the SMD at an axial location Z=75 mm. Comparisons of PDS and PDPA measurements， W.D. Bachalo 1994. New Compact Bench Top PDI， 1-D， 2-D or 3-D Velocity components First self- contained Phase 川服 Doppler TANK CLEANING Light Rinse to High Impact Washing NoxtlesIS - fhid-prives sacries - hisher inpact rinaing it menseks a Interferometer -Metarerivew wahers - tight impact cheaning it terver eoet ·Tuhise wnhers -masimam inpact cleaning it ven CTes (PDI)) using diode pumped solid state Tank C lasers， Artium Technologies， Tank Cleaning Inc.， 2005. MX9 First self-contained PDI instrument using a diode pumped solid state lasers with capability of measuring 3 velocity components simultaneously， Artium Technologies， Inc.， 2001.