SPRAY DIAGNOSTIC SOLUTIONS State-of-the-art optical measurements systems

Use of PDA for diesel injection spray analysis in a high-pressure chamber. Courtesy of Achates Power Inc. Fuel Injection Lab, US.

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 these applications, 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 Partnering with Dantec Dynamics...

Match Your Spray Application with a Dantec Dynam Droplet size Size/velocity correlation Time/size correlation Droplet velocity Droplet shape Spatial distribution Mixing phenomena Droplet/wall interaction Phase Doppler Analysis (PDA) Shadow Sizer 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 Features • Simultaneous droplet size, shape and velocity measurements in a chosen area • No restrictions on droplet shape, composition or size...

mics Solution Turbulence Volume flux/ concentration Spray Geometry Interferometric Particle Imaging (IPI) Features • Spray pattern and plume geometry parameters • Tip penetration • Cone angle and symmetry • Centre of gravity and area Features • Simultaneous size and velocity measurements of individual droplets in a plane • Global data with high accuracy Principles • Imaging with backlight illumination or laser light sheet • Data processing and analysis via dedicated imaging software Applications • Fuel injection • Pharmaceutical inhalers Principles • Interferometric with laser sheet • Dual cameras...

Sample Results Time-resolved fuel injection measurements by PDA The measurement of very dense sprays from sources such as high-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 droplet size and velocity as a function of time after injection. Top: individual drop size and velocity. Bottom: corresponding time-binned (50 µsec) averaged...

Whole-field size and velocity measurements with DynamicStudio IPI and Shadow Sizer The Interferometric Particle Imaging (IPI) and shadow sizing techniques use cameras and a laser light sheet (IPI) or a backlight illumination (Shadow Sizer). Images are collected and analyzed by Dantec's DynamicStudio software imaging platform to extract size and velocity data of each particle in the imaged area, thus enabling you to perform extensive spatial, temporal and statistical analysis of the sprays. Shadow image, left: the droplet and liquid ligament are identified thanks to advanced image analysis algorithms...

About Dantec Dynamics 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: Fluid Mechanics Thermal Comfort Strain, Stress & Vibration Particle Characterization Non-destructive Testing Combustion Diagnostics Paper Process Optimization Disatac Tachometers Worldwide representation From our six offices and more than 30 representatives worldwide we approach our customers individually. We examine...