A multi-time-delay approach for correction of the inherent error in single-component molecular tagging velocimetry
| Autor: | Patrick Hammer, Ahmed Naguib, Shahram Pouya, Manoochehr Koochesfahani |
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| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Measurement Science and Technology. 24:105302 |
| ISSN: | 1361-6501 0957-0233 |
| DOI: | 10.1088/0957-0233/24/10/105302 |
| Popis: | A technique is proposed to correct the bias error associated with one-component molecular tagging velocimetry (1c-MTV). 1c-MTV is typically used to capture the velocity component normal to a single or multiple lines of tagged fluid molecules with very high spatial resolution. However, the measurements are affected by an inherent error, which arises from the presence of a velocity component parallel to the lines. In the present study, a Taylor-series-based approach is used to derive a general mathematical expression for this error. The derived expression, which is validated using simulated MTV measurements in laminar channel flow with suction/blowing, is used as the basis for introducing a correction method involving the acquisition of MTV images at multiple time delays. To examine the effectiveness of this ‘multi-time-delay’ approach for correcting 1c-MTV data, an experiment is conducted whereby a known bias error is deliberately imposed on measurements in laminar channel flow. The corrected measurements agree with the true velocity profile to better than 2%, thus validating the correction method. |
| Databáze: | OpenAIRE |
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