Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Oscillations of Ventilated Cavities Experimental Aspects
By injecting air in the low pressure regions of water flows, it is possible to obtain cavities similar to the attached cavities due to 'true' cavitation. That ventilation is a current practice in the field of spillways for large concrete dams, especially in tropical zones. It is aimed to diminish the risks of erosion, as the speeds of the water flows ordinarily are very large: the stresses between concrete and water are diminished by the injected air, due to its compressibility which increases the characteristic time of contact and diminishes the forces for the same total impulse. Then the main problem is to calculate the ideal dimensions of the ducts by which atmospheric air is sucked up under the water flow (Chanson, 1999). Here our main concern is rather on the side of ventilated hydrofoils or, possibly, torpedoes.
Oscillations of Ventilated Cavities Experimental Aspects
By injecting air in the low pressure regions of water flows, it is possible to obtain cavities similar to the attached cavities due to 'true' cavitation. That ventilation is a current practice in the field of spillways for large concrete dams, especially in tropical zones. It is aimed to diminish the risks of erosion, as the speeds of the water flows ordinarily are very large: the stresses between concrete and water are diminished by the injected air, due to its compressibility which increases the characteristic time of contact and diminishes the forces for the same total impulse. Then the main problem is to calculate the ideal dimensions of the ducts by which atmospheric air is sucked up under the water flow (Chanson, 1999). Here our main concern is rather on the side of ventilated hydrofoils or, possibly, torpedoes.
Oscillations of Ventilated Cavities Experimental Aspects
J. M. Michel (Autor:in)
2001
13 pages
Report
Keine Angabe
Englisch
Instability of ventilated cavities
| TIBKAT | 1959
Pulsation of ventilated cavities
| TIBKAT | 1961
Ventilated cavities on submerged three-dimensional hydrofoils
| TIBKAT | 1961
Experimental study of the cooling season performance of ventilated double-glass envelope cavities
| British Library Conference Proceedings | 2000
Predicting the filling of ventilated cavities behind spillway aerators
| British Library Online Contents | 1995