저항론 과제_Draw Kelvin wave_켈빈파
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- 2021.05.31
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"저항론 과제_Draw Kelvin wave_켈빈파"에 대한 내용입니다.
목차
1. THEORY
2. RESULT
3. RESULT ANALYSIS
본문내용
1. Draw Kelvin wave with wave elevation contour and oblique 3D view according to the variation of the submerged depth of source and inflow speed, and discuss the difference of the wave systems according to the conditions.
– Computation domain : X[0, 30], y[-10, 10]
– Submerged depth of source : 1.0, 2.0
– Inflow speed : 3.0, 4.0, 5.0
Theory
1-1 Potential flow
-uniform flow
Paralle to x axis u = V, v=0
Velocity potential =>
-Source
Emission to all direction
Source strength : volumetric flow rate per unit length
Flow speed
Velocity potential : integration of flow speed
1-2 Potential flow for the wave system
The wave height can be obtained by using the positive flow. - Co
ordinate : fixed at pressure point
Pressure point moves to -x direction with the speed of U
In the fixed coordinate at pressure point, uniform flow U flows to the pressure point toward +x direction
+y axis : starboard, +z axis : upward
- Velocity potential
- Boundary condition : nonlinear kinematic/dynamic boundary condition
× Uniform flow �� + disturbed potential due to an object �
× In small slenderness ratio �� >> �
Boundary condition : nonlinear kinematic/dynamic boundary condition
참고 자료
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