Proposal of a method to measure aerodynamic forces without using force sensors in wind tunnel testing of tumbling plates
| Autor: | Mitsuo Ishiguro, Yoshiaki Miyake |
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| Rok vydání: | 2021 |
| Předmět: | |
| Zdroj: | Journal of the Institute of Industrial Applications Engineers. 9:75-84 |
| ISSN: | 2187-8811 2188-1758 |
| DOI: | 10.12792/jiiae.9.75 |
| Popis: | A new wind tunnel test method is proposed to measure the aerodynamic forces act on the tumbling plate and the tension of the tow string in the wind tunnel not by using force sensors but by measuring the tow position. The tumbling phenomenon is considered to be an important phenomenon for aircraft flight safety because of the possibility of falling objects from aircrafts reaching far away or for knowing the behavior of falling roof tiles blown off by strong winds. Therefore, many tests to measure the force act on the tumbling plate in wind tunnel have been conducted. However, since the rotation of the test piece is accompanied by difficulties ex. support interference, movement restrictions, etc. However, according to present method, the aerodynamic forces act on the tumbling plate in wind tunnel can be measured optically in a non-contact manner, and an expensive force sensor is not required. Furthermore, it is also effective under conditions such as low wind velocity, in which the aerodynamic forces are buried in the measurement accuracy of the force sensors. This paper explains this wind tunnel test method from the viewpoint of dynamic balance and reports the results of verification wind tunnel test in which the effectiveness of this method was confirmed. |
| Databáze: | OpenAIRE |
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