Page 135 - Practical Design Ships and Floating Structures

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1.8E+4
8
A
;; 1.6E+4
2
E
U
1.4E+4
U
c
9
VI .-
L
VI
t 1.2E14
40 50 60
Ship Speed (knots)
Figure 5: Trial Resistance and Available Thrust

7 CONCLUSIONS
In this paper, the study on the conceptual design of very large-size super-high-speed foil catamaran
containership with about 4,000 TEU loading capacity and 60 knot ship speed has been very brief
discussed. From the result of the study, the following conclusions could be made :

- If five large-capacity waterjets such as KaMeWa 25530 type each coupled with 60,000 kW gas
turbine such as GE LM6000 + type are installed in each of demi-hulls, the ship would achieve the
speed of about 58 knots. This is rather conservative prediction.

- If the overall system is more carefully optimized utilizing the experiences in this study, the object
ship is expected to achieve more than 60 knots of ship speed with the above propulsion system.

- The reduction in resistance from that of bare hull due to the hydrofoil system is about 10% for this
object ship, which is considered to be very small compared with those for small size ships. The
effectiveness of the hydrofoil system is reduced as the ship size is increased.

- For the object ship, the design speed of 50 knot may be more practical. It is estimated that eight
60,000 kW gas turbines and two 6,500 kW auxiliary diesel engines are required to achieve higher
than 50 knots of ship speed.
- Through the execution of the 3-stage R & D program, a vast amount and high level experiences
and technologies have been developed and accumulated for the design of buoyancyflift
combination type super-high-speed ships, that is, super-high-speed foil catamaran ships.
References

1. Min K-S.(1991). Long-Range High-speed Catamaran Passenger Ship Design. the Proceedings of
the First International Conference on FAST Sea Transportation(FAST '91), Trondheim, Norway.

2. Min K-S.(1992). Design and Construction of Long-Range High-speed Foil Catamaran Passenger
Ship. the Proceedings of the Nineteenth Symposium on Naval Hydrodynamics, Seoul, Korea.

3. Min K-S., Kim 0-H. and Park J-S.(1993). A Study on the Structural Design of the Hydrofoil
System for High-speed Foil Catamaran Ships. the Proceedings of the Second International