Seite - 834 - in Book of Full Papers - Symposium Hydro Engineering

Fig. 1 (a) Physical scale model of a bottom outlet at VAW, (b) gate chamber (a) Modèle à échelle réduite d’une vidange de fond à la VAW, (b) chambre de la vanne 2.2. AIR DEMAND IN MODEL TESTS The air discharge Qa,o through the aeration chamber increases with increasing HE and attains a maximum for moderate relative gate openings 0.4 ≤ a/amax ≤ 0.6 (Fig. 2a). The maximum is shifted towards smaller a/amax for increasing HE. Fig. 2 (a) Qa,o and (b) Qa,u for different values of a/amax, HE, L and ζ (a) Qa,o et (b) Qa,u pour des valeurs différentes de a/amax, HE, L et ζ 834