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| Titel: |
Self-sustained Oscillation Phenomena of Fluidic Flowmeters |
| Auteur: |
K. Yamamoto F. Hiroki K. Hyodo |
| Verschenen in: |
Journal of visualization |
| Paginering: | Jaargang 1 (2002) nr. 4 pagina's 387-396 |
| Jaar: |
2002-09-06 |
| Inhoud: |
In order to clarify the metering characteristics of the fluidic flowmeters employing self-sustained oscillation, the oscillating jets in a feedback oscillator and a target oscillator were visualized and the differential pressures across the jets were measured. The experiment clarified that the fluidic oscillators could be classified into three types, i.e., feedback type, reflection type and recirculation type oscillators. The jet oscillation was caused by external feedback control pressures in the feedback type oscillator. On the other hand, the internal feedback pressure difference, produced mainly by a partly reflected jet flow from the target, sustains the jet's oscillation in the reflection type oscillator. In the recirculation type oscillator, the jet oscillation was caused by the internal feedback pressure difference produced by a jet flow recirculating along the side wall of the target oscillator under the influence of the reflected jet flow. The jet oscillation of the target oscillator was influenced by forced pulsation of the jet flow as follows. The strength of the reversed jet flow and reflected jet flow was affected directly with the pulsation of the jet and a synchronization phenomenon appeared, in which the oscillation frequency was matched with the pulsation frequency of the jet flow. The ranges of dimensional parameters maintaining the oscillation of the target oscillator were revealed. It was found that the target oscillator with crescent target could produce steady oscillation in a wider region of dimensional parameters. |
| Uitgever: |
IOS Press |
| Bronbestand: |
Elektronische Wetenschappelijke Tijdschriften |
Details van artikel 13 van 24 gevonden artikelen
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