Trans RINA, Vol 152, Part A4, Intl J Maritime Eng, Oct-Dec 2010


This flooding case had to be stopped just before the final equilibrium condition in order to avoid uncontrolled flooding of the tween deck. This was done by closing the valve in the longitudinal bulkhead between the SB side tank and equipment


room. The simulations were continued until the final equilibrium.


An empty small tank in the pump room was also flooded through an open connection near the top of the room. Also this was taken into account in the numerical model.


Both air pipes in the damaged tank were open and no notable air compression was observed during the test. Thus in simulation all rooms were modelled to be fully vented.


The measured and calculated results for heel and trim are shown in Figure. 25 and 26. Interestingly, the use of rough estimations for the discharge coefficients seems to provide a better correspondence with the measured heel angle.


0.5 1.0 1.5


−5.5 −5.0 −4.5 −4.0 −3.5 −3.0 −2.5 −2.0 −1.5 −1.0 −0.5 0


measured


calculated, rough calculated, detailed


Figure 23: Two-compartment flooding case


Figure 24: Initial and final condition after two- compartment flooding from a stationary camera


0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0


0


300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 Time [s]


Figure 25: Heel angle for two-compartment flooding case


0.5 1.0 1.5 2.0 2.5 3.0 3.5


0 0 measured


calculated, rough calculated, detailed


0 0 measured


calculated, rough calculated, detailed


300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 Time [s]


Figure 26: Trim angle for Case


0.5 1.0 1.5 2.0 2.5 3.0 3.5


300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 Time [s]


Figure 27: Water level in the equipment room for two- compartment flooding case


0 0 measured


calculated, rough calculated, detailed


two-compartment flooding


300 600 900 1200 1500 1800 2100 2400 2700 3000 3300 Time [s]


Figure 28: Water level in the forward end of the store for two-compartment flooding case


©2010: The Royal Institution of Naval Architects


A-205


Water level B10 [m]


Heel [deg]


Water level D2 [m]


Trim [deg]


Page 1  |  Page 2  |  Page 3  |  Page 4  |  Page 5  |  Page 6  |  Page 7  |  Page 8  |  Page 9  |  Page 10  |  Page 11  |  Page 12  |  Page 13  |  Page 14  |  Page 15  |  Page 16  |  Page 17  |  Page 18  |  Page 19  |  Page 20  |  Page 21  |  Page 22  |  Page 23  |  Page 24  |  Page 25  |  Page 26  |  Page 27  |  Page 28  |  Page 29  |  Page 30  |  Page 31  |  Page 32  |  Page 33  |  Page 34  |  Page 35  |  Page 36  |  Page 37  |  Page 38  |  Page 39  |  Page 40  |  Page 41  |  Page 42  |  Page 43  |  Page 44  |  Page 45  |  Page 46  |  Page 47  |  Page 48  |  Page 49  |  Page 50  |  Page 51  |  Page 52  |  Page 53  |  Page 54  |  Page 55  |  Page 56  |  Page 57  |  Page 58  |  Page 59  |  Page 60  |  Page 61  |  Page 62  |  Page 63  |  Page 64  |  Page 65  |  Page 66  |  Page 67  |  Page 68  |  Page 69  |  Page 70  |  Page 71  |  Page 72  |  Page 73  |  Page 74