Section 4 - Wave-Making Resistance Flashcards
The wave-making resistance of a ship is the NET FORE-AND-AFT Force upon the ship due to the fluid pressures acting normally on all parts of the hull
Certo
the frictional resistance is the result of the
tangential fluid forces
certo
No caso de um submarino, a pressão varia ao longo do casco, mas não há formação de ondas
Certo
A energia para manter o sistema de ondas é igual à energia para mover o navio contra esse sistema
Certo
A Wave-Making Resistance depends in LARGE MEASURE on the shapes adopted for the area curve
Certo
A Wave-Making Resistance depends in LARGE MEASURE on the length of the hull
Errado.
on the shapes adopted for the area curve, waterlines and transverse sections,
A Wave-Making Resistance depends in LARGE MEASURE on the shapes adopted for the transverse sections
Certo
Análise teórica computacional é a ferramenta mais valiosa para determinar a Resistência Formadora de Ondas
Errado.
model tests remain the most important tool avaiable
The heights of successive transverse-wave crests along the middle line behind the pressure point increase going af
Errado
diminish going aft
The transverse waves meet the divergent waves in cusps, which are the highest points in the system
Certo
A altura das cúspides diminui menos rapidamente com a distância do que a altura das ondas transversais
Certo
Well astern of the ship, the transverse waves become more proeminent
Errado.
Divergent-waves
Near the bow of a ship the most noticeable waves are a series of divergent waves, starting with a small wave at the bow
Errado.
Large wave at the bow
As ondas transversais são formadas entre as ondas divergentes, em cada lado do navio
Certo
Ao longo da sua linha de cristas, as ondas divergentes tem comprimento bastante pequeno.
Certo.
Quite short length along its crest line
The divergent waves are most easily seen along the middle portion of a ship or model with parallel body
Errad
The divergent waves are most easily seen just behind a ship running at high speed
Certo
The waves in the immediate vicinity of a model are found to be a little shorter
Certo
Astern from the ship, the waves attain the length L, about two wave lengths astern
Certo
The waves in the immediate vicinity of a
model are found to be a little shorter, but they attain the length L, about two ship lengths astern
Errado.
Two wave lengths
At low speeds, resistance is almost wholly viscous in character
Correto
A Resistencia Formadora de Ondas é a Força Resultante no sentido longitudinal, devido às pressões perpendiculares ao casco
Certo
