D3.4 - Multimode Laser Doppler Velocimeter for Flow Measurements in the Manifold of a Fuel Cell Stack
- AMA Conferences 2015
2015-05-19 - 2015-05-21
- Proceedings SENSOR 2015
- D3 - Optical Measurement Technology
- S. Burgmann, M. Kinaci - Zentrum für BrennstoffzellenTechnik GmbH (ZBT), Duisburg (Germany), F. Schmieder, L. Büttner, J. Czarske - Technische Universität Dresden (Germany)
- 560 - 565
Fuel cell stack performance strongly depends on the uniformity of the flow distribution over the fuel cells. Typically, numerical flow simulations are used to design the small flow geometries of a stack but experimental validation of the simulated flow is mostly lacking. To measure the flow distribution within these small geometries a specific Laser Doppler Velocimeter has been developed that uses light with low spatial coherence (multimode light) and fluorescent tracer particles. A spatial resolution of less than 100 μm even close to the wall is achieved. Comparing the measurement results of this MM-LDVsensor with other experimental and numerical data revealed a very good agreement for a model configuration. Therefore, this tested and validated sensor was applied to the flow within the real geometry of a fuel cell stack manifold to gain a deeper knowledge of the flow configuration and to generate a benchmark for CFD-based fuel cell design.