# Reanalysis of the Sydney Harbor RiverCat Ferry

## Abstract

**:**

## 1. Introduction

#### 1.1. Previous Studies

#### 1.2. Current Investigation

## 2. Hydrodynamic Theory

#### 2.1. Decomposition of Resistance

#### 2.2. Wave Resistance

#### 2.3. Hydrostatic Resistance

#### 2.4. Transom Hollow

#### 2.5. Frictional Resistance

## 3. Characteristics of the RiverCat

#### 3.1. General Layout

#### 3.2. Demihulls

## 4. Numerical Computations

#### 4.1. Finalized Vessel

#### 4.2. Transformations of the Finalized Demihull

#### 4.3. Wave Resistance

#### 4.4. Model Total Resistance

#### 4.5. Prototype Total Resistance

#### 4.6. Hull Finish

## 5. Conclusions

#### 5.1. Current Investigation

#### 5.2. Future Studies

## Funding

## Institutional Review Board Statement

## Informed Consent Statement

## Data Availability Statement

## Conflicts of Interest

## List of Symbols

${A}_{T}$ | Transom area | T | Draft |

${A}_{M}$ | Midship-section area | U | Ship velocity |

B | Overall beam | W | Displacement weight |

${B}_{1}$ | Demihull beam | ${b}_{1}$ | Demihull local beam |

${C}_{A}$ | Correlation allowance | d | Depth of water |

${C}_{B}$ | Block coefficient | ${f}_{F}$ | Frictional-resistance form factor |

${C}_{P}$ | Prismatic coefficient | g | Acceleration due to gravity |

F | Froude number | k | Circular wave number |

${F}_{d}$ | Depth Froude number | ${k}_{x}$ | Longitudinal wave number |

${F}_{\nabla}$ | Volumetric Froude number | ${k}_{y}$ | Transverse wave number |

L | Length | s | Demihull centerplane separation |

${L}_{P}$ | Prototype nominal length | w | Towing-tank or canal width |

$L/{\nabla}^{1/3}$ | Slenderness ratio | x | Longitudinal coordinate |

P | Power | ${x}_{t}$ | Longitudinal coordinate at transom |

${R}_{A}$ | Correlation resistance | y | Transverse coordinate |

${R}_{F}$ | Frictional resistance | z | Vertical coordinate |

${R}_{H}$ | Hydrostatic resistance | $\Delta $ | Model displacement mass |

${R}_{T}$ | Total resistance | ${\Delta}_{P}$ | Prototype displacement mass |

${R}_{W}$ | Wave resistance | ${\zeta}_{t}$ | Free-surface elevation on face of transom |

${R}_{a}$ | Aerodynamic resistance | $\eta $ | Propulsion efficiency |

${R}_{N}$ | Reynolds number | $\nu $ | Kinematic viscosity of water |

S | Overall wetted-surface area | $\rho $ | Density of water |

${S}_{1}$ | Demihull wetted-surface area | ∇ | Displacement volume |

## References

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Quantity | Symbol * | Value |
---|---|---|

Length on waterline | L | 35.00 m |

Demihull beam | ${B}_{1}$ | 1.000 m |

Beam overall | B | 10.06 m |

Draft | T | 1.226 m |

Block coefficient | ${C}_{B}$ | 0.6262 |

Prismatic coefficient | ${C}_{P}$ | 0.6958 |

Slenderness ratio | $L/{\nabla}^{1/3}$ | 11.68 |

Transom–area ratio | ${A}_{T}/{A}_{M}$ | 0.4311 |

Displacement mass | $\Delta $ | 55.00 t |

Power | P | $2\times 335$ kW |

Speed | U | 23 kn |

Index | Parameter | Symbol | Values | ||
---|---|---|---|---|---|

Affine 0 ${}^{\u2020}$ | Affine 1 | Affine 2 | |||

1 * | Slenderness ratio | $L/{\nabla}^{1/3}$ | 11.68 | 14.60 | 17.52 |

2 | Beam-to-draft ratio | ${B}_{1}/T$ | 0.8159 | 1.275 | 1.836 |

3 | Demihull separation | $s/L$ | 0.2589 | 0.3160 | 0.3731 |

4 | Transom-area ratio | ${A}_{T}/{A}_{M}$ | 0.4311 | 0.2156 | 0 |

Assumption | Transport Factor TF * |
---|---|

ITTC (1957) with ${C}_{A}$ = 0 | 11.03 |

ITTC (1957) with ${C}_{A}$ = 0.0004 | 09.52 |

Measured | 09.52 |

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**MDPI and ACS Style**

Doctors, L.J.
Reanalysis of the Sydney Harbor RiverCat Ferry. *J. Mar. Sci. Eng.* **2021**, *9*, 215.
https://doi.org/10.3390/jmse9020215

**AMA Style**

Doctors LJ.
Reanalysis of the Sydney Harbor RiverCat Ferry. *Journal of Marine Science and Engineering*. 2021; 9(2):215.
https://doi.org/10.3390/jmse9020215

**Chicago/Turabian Style**

Doctors, Lawrence J.
2021. "Reanalysis of the Sydney Harbor RiverCat Ferry" *Journal of Marine Science and Engineering* 9, no. 2: 215.
https://doi.org/10.3390/jmse9020215