spray_diagnostic_solutions_212[1].pdf

7/27/2019 Spray_diagnostic_solutions_212[1].pdf

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SPRAY DIAGNOSTIC SOLUTIONSState-of-the-art optical measurements systems


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Use of PDA for diesel injection sprayanalysis in a high-pressure chamber.Courtesy of Achates Power Inc. FuelInjection Lab, US.

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Partnering with Dantec Dynamics

Dantec Dynamics is your ideal partner for spray measure-ment solutions. As our customer, you will benefit from:

The most complete range of particle diagnostic instru-

ments, from robust turn-key systems to advanced,

customized systems, to meet your current and futuremeasurement requirements.

Our commitment to continuous product innovationincorporating the latest technology and backed by ISO

9000 certified quality assurance programmes.

The support of our highly trained staff in a company withmore than 50 years of experience in providing state-of-the-

art measurement solutions. A partnership with the world's leading supplier of spray

measurement solutions, with several thousand installed

systems around the globe at research labs, universities, and

numerous industrial sites. Local support from our five subsidiary companies and a

competent network of global distributors.

Sprays or atomized liquids are used everywhere, both in our

daily lives and in industry. They facilitate precise fuel injection for

our car engines and more efficient use of fertilizers for our crops;

they allow us to produce food and powder using drying processes,

as well as inhalers for many kinds of medicines. In all of theseapplications, validating and improving atomization methods

requires precise and complete characterization of the spray

dynamics: droplet size, velocity, concentration, mass distribution,

mass flux, and spray shape.

Characterize your Spray

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Phase Doppler Analysis (PDA)

Features Simultaneous size and velocity measurements of each

droplet No prerequisite assumptions on size and velocity

distributions

Highest measurement accuracy and resolution Online, real-time results

Principles

Interferometric technique

Point measurement

Applications Spherical and homogeneous droplets over a wide size

range

High droplet concentration

Shadow SizerFeatures

Simultaneous droplet size, shape and velocity measure-ments in a chosen area

No restrictions on droplet shape, composition or sizedistributions

Principles Imaging of particles using diffuse backlighting (LED or

laser) Advanced algorithms to detect particles, calculate

diameter, area, volume, and velocity

Applications

Liquid droplets, ligaments or bubbles Droplets with inclusions or various compositions

Match Your Spray Application with a Dantec Dyna

Droplet size

Time/sizecorrelationDroplet velocity

Droplet/wallinteraction

Mixingphenomena

Droplet shape

Size/velocitycorrelation

Spatialdistribution

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Spray Geometry

Features Spray pattern and plume geometry parameters

Tip penetration Cone angle and symmetry

Centre of gravity and area

Principles

Imaging with backlight illumination or laser light sheet Data processing and analysis via dedicated imaging

software

Applications

Fuel injection Pharmaceutical inhalers

Interferometric Particle Imaging (IPI)

Features Simultaneous size and velocity measurements of individual

droplets in a plane Global data with high accuracy

Principles Interferometric with laser sheet

Dual cameras for accurate particle tracking velocity

Applications

Spherical, homogeneous, and transparent droplets Diluted-liquid atomizers

cs Solution

aporation

Turbulence

Volume flux/concentration

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Time-resolved fuel injection measurements by PDA

The measurement of very dense sprays from sources such ashigh-pressure fuel injectors has until recently been limited.

Our HiDense PDA solution - which includes a dedicated

receiver, high-power transmitter, small measurement volume,unmatched BSA signal processor and extensive software

- now allows access to this important data.

The graphs below show individual and averaged fuel dropletsize and velocity as a function of time after injection.

Measurement results and documentation

Dantec Dynamics' PDA software includes temporal and

spatial distribution, statistical calculations such as meandiameter (D10), volume mean diameter, Sauter mean

diameter (D32), flux and concentration, as well as extensivemeasurement validation criteria, so that measurement results

can be documented. This information is available in

numerous formats, including tabular, histograms, profilesand spatial distributions.

Sample Results

Top: individual drop size and velocity.Bottom: corresponding time-binned (50 sec) averaged values.

Size cumulative histogram with Rosin-Rammler fit.

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Whole-field size and velocity measurements withDynamicStudio IPI and Shadow Sizer

The Interferometric Particle Imaging (IPI) and shadow sizing

techniques use cameras and a laser light sheet (IPI) or a back-

light illumination (Shadow Sizer).Images are collected and analyzed by Dantec's Dynamic-

Studio software imaging platform to extract size and velocitydata of each particle in the imaged area, thus enabling you

to perform extensive spatial, temporal and statistical analysisof the sprays.

Spray geometry parametersThe spray is illuminated by a pulsed light source to freeze

the motion and the images are stored on a PC. TheDynamicStudio software platform handles the hardware syn-

chronisation, data storage and image analysis.

The example shown is a snapshot in false colour of a multi-

hole fuel injector spray before combustion. For each spray,the penetration length, spray axis, cone and spread angles

are measured.

Shadow image, left: the droplet and liquid ligament are identifiedthanks to advanced image analysis algorithms allowing discardingout of focused droplets. The droplet shape and orientation informa-tion is then extracted. Courtesy of SLA TU Darmstadt. IPI image,right: the droplet size is measured from the interferometric fringepatterns.

Fuel injector spray geometry by Mie scattering analysis.

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About Dantec Dynamics

Worldwide representation

Dantec Dynamics is the leading provider of laser optical measurement systems and sensors.

Since 1947 we have provided solutions for customers to optimize their component testing

and products. Our large number of customers benefit from our quality solutions within:

From our six offices and more than 30 representatives worldwide we

approach our customers individually. We examine the specific needs

and find the best solution for you. For us you are a long-term partner

in improving efficiency, safety and quality of life.

A list of representatives is available at our website.

DENMARK (headquarters)

Dantec Dynamics A/S

[email protected]

FRANCE

Dantec Dynamics S.A.S.

[email protected]

GERMANY

Dantec Dynamics GmbH

[email protected]

JAPAN

Dantec Dynamics K.K.

[email protected]

UNITED KINGDOM

Dantec Dynamics Ltd.

[email protected]

USA

Dantec Dynamics Inc.

[email protected]

www.dantecdynamics.com

Fluid Mechanics

Particle Characterization

Combustion Diagnostics

Thermal Comfort

Microfluidics

Paper Process Optimization

Strain, Stress & Vibration

Non-destructive Testing

Disatac Tachometers

The specifications in this document are subject to

change without notice.

Dantec Dynamics is trademark of Dantec Dynamics A/S.

Publication No.: 212_v5

Dantec Dynamics a Nova Instruments company

spray_diagnostic_solutions_212[1].pdf

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