Estimation of Wake Fraction, Thrust Deduction and Interaction Coefficients between Hull, Propeller and Rudder in Deep and Shallow Water
- Last UpdatedAug 16, 2023
- 2 minute read
Estimation of Wake Fraction, Thrust Deduction and Interaction Coefficients between Hull, Propeller and Rudder in Deep and Shallow Water
The wake fraction and thrust deduction in straight ahead motion in deep water are estimated from BSRA Methodical Series References 6. The wake fraction and thrust deduction are functions of the ship and propeller characteristics. The experimental data of the wake fraction and thrust deduction in shallow water were analyzed and a shallow water correction factor was found.
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(32) |
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(33) |
The interaction coefficients between hull, propeller and rudder are defined by three correction factors, namely:
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for the rudder force in X-direction |
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for the rudder force in Y-direction |
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for the rudder moment about Z-axis. |
These correction factors are functions of ship particulars. The shallow water effects are given by:
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(34) |
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(35) |
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(36) |
