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Wave Resistance - Coggle Diagram

- - - - Speed-length ratio
      - V - [kt]
      - L - [ft]
- - - - Breadth of wave
      - Square of the wave`s height

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Wave Resistance

Wave Resistance

Create wave

spends energy

Proportional to

Breadth of wave

Square of the wave`s height

Wave generators

Bow

Stern

Reinforced wave

Stern wave crest

at the Bow wave crest

Diminished wave

Stern wave crest

at the Bow wave trough

Wave length

$l=0.557V^2$

V - wave velocity em [kt] (same as ship)

Wave reinforcement or cancelation depends on relation \( l/L \)

\( \frac{l} {L}\approx\frac{V^2} {L} \)

\( \frac{V} {\sqrt{L}} \)

Speed-length ratio

Resistance x Speed-length ratio (Havelock)

Decrease from speed-length ratio of 2

Interferência construtiva

approx 1 shiplength

Transverse waves only

Deep water

l - wavelength [ft]

V - [kt]

L - [ft]

reinforced

Also vary with hull shape

\( l \) slighly greater than \(L\)

water does not have time to disturb

not disturbed as at lower speeds