In order to validate numerical models or to calibrate model constants, fundamental experiments are necessary. In order to be not dependent on experimental data from literature a pneumatic test rig was designed. In a modular concept we are able to conduct various experiments in a particle laden gas flow. A fan provides gas velocities up to 40m/s. According to application particles of different size and mass can be feed in by a vibrating chute or an injector lance. After passing the experimental modules in the channel gas and particle flows are separated by a cyclone (Fig.1). The basic operating conditions of the test rig (fluid velocity, pressure losses, temperature, particle loading etc.) are controlled by an I/O system based on a PLC.
Various equipment is available for investigating fluid and particle flows. The available measurement methods are covering:
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Experimental Fluid Mechanics
- Particle image velocimetry (PIV): System with two cameras for stereo PIV or combined PIV/LIF (laser induced fluorescence) measurements.
- Online particle sizing and counting: The system based on white light diffraction has two sensors and is therefore able to measure e.g. before and after a cyclone quasi-simultaneously to investigate separation efficiency.
- High speed camera: B/w camera with 2.000 fps at full resolution and up to 120.000 fps at reduced resolution.
- Constant temperature anemometry (CTA): System with two channels an various wire and film probes for measurements in gases and liquids.
Focus for future research will be light diffraction for particle sizing in low laden flows and optical image analysis for highly laden particle flows.
