1. Where is the limit of rationality?
Kus on mõstlikkuse piir?
25/04/2017
SI:KI:PING Prof Anatoli Alop

2. 1. Speed is above all!(??) Or speed as an end in itself?
Affected by three main faktors:
Power
Efficiency R v T
Source:
Source:
Resistance
25/04/2017
SI:KI:PING Prof Anatoli Alop
Source: H. Punab, Laeva jõuseadmed. Tallinn, 2008

3. The ways for speed increasing
1. More power ?
SHIP PROPULSION PERFORMANCE
Source:
25/04/2017
SI:KI:PING Prof Anatoli Alop

4. The ways for speed increasing
The better propulsive coefficient?
Source:
25/04/2017
SI:KI:PING Prof Anatoli Alop

5. The ways for speed increasing
Ship propulsion devices
A. Active devices
Sail
Flettner Rotor
Source:
25/04/2017
SI:KI:PING Prof Anatoli Alop

6. The ways for speed increasing
B. Re-active devices I
Paddle-wheel
η < 0,5
Oars
Voith-Schneider propeller, η < 0,5 (for speed more than 20 knots)
25/04/2017
SI:KI:PING Prof Anatoli Alop
Source:

7. The ways for speed increasing
B. Re-active devices II
Propeller on a modern mid-sized merchant vessel
Ship propeller from 1843
η = 0, ,75
Source:
25/04/2017
SI:KI:PING Prof Anatoli Alop

8. The ways for speed increasing
B. Re-active devices II
Water-jet-propulsion system
Source:
25/04/2017
SI:KI:PING Prof Anatoli Alop

9. The ways for speed increasing
Perfection of propellers
Source:
25/04/2017
SI:KI:PING Prof Anatoli Alop

10. SI:KI:PING Prof Anatoli Alop
Examples
25/04/2017
SI:KI:PING Prof Anatoli Alop

11. The ways for speed increasing
Perfection of propulsion systems
Source:
25/04/2017
SI:KI:PING Prof Anatoli Alop

12. SI:KI:PING Prof Anatoli Alop
Cavitation
25/04/2017
SI:KI:PING Prof Anatoli Alop
Source:

13. The ways for speed increasing
Decreasing of fluid resistance?
The main types of resistance:
Friction resistance
Form resistance
1 – vaba voolu ala
2 – piirikiht
3 – hüdrodünaamiline jälg (kiiluvesi) 2 3 v a 1
Source: H. Punab, Laeva jõuseadmed. Tallinn, 2008
25/04/2017
SI:KI:PING Prof Anatoli Alop

14. The ways for speed increasing
The main types of resistance:
Wave making resistance
vmax
vmin v p + -
Source: H. Punab, Laeva jõuseadmed. Tallinn, 2008
25/04/2017
SI:KI:PING Prof Anatoli Alop

15. The ways for speed increasing
The main types of resistance:
Wave making resistance  
Lahknevad lained
Põiklained
Vöörilainete süsteem
Joon. 2.6
Ahtrilainete süsteem
25/04/2017
SI:KI:PING Prof Anatoli Alop

16. SI:KI:PING Prof Anatoli Alop
Body in fluid
25/04/2017
SI:KI:PING Prof Anatoli Alop

17. SI:KI:PING Prof Anatoli Alop
Examples
25/04/2017
SI:KI:PING Prof Anatoli Alop