calcKristWettedSA.Rd
Calculate hull wetted surface area (wettedSA
) (m^2)
using the Kristensen method.
calcKristWettedSA( shipType, maxDisplacement, maxDraft, actualDraft, lwl, breadth, Cbw, seawaterDensity = 1.025, tankerBulkCarrierGCargoShipTypes = c("general.cargo", "tanker", "chemical.tanker", "liquified.gas.tanker", "oil.tanker", "other.tanker", "bulk.carrier"), containerShipTypes = c("container.ship"), paxTugShipTypes = c("ferry.pax", "ferry.ro.pax", "cruise", "cruise.ed", "yacht", "tug", "passenger", "ro.ro") )
shipType | Ship type (vector of strings, see |
---|---|
maxDisplacement | Maximum ship displacement (vector of numericals, m^3) |
maxDraft | Maximum summer load line draft (vector of numericals, m) |
actualDraft | Actual draft (vector of numericals, m) |
lwl | Waterline length (vector of numericals, m) (see |
breadth | Moulded breadth (vector of numericals, m) |
Cbw | Waterline block coefficient (vector of numericals, dimensionless)
(see |
seawaterDensity | Sea water density. Default = 1.025 (g/cm^3). Can supply either a vector of numericals, a single number, or rely on the default |
tankerBulkCarrierGCargoShipTypes | Ship types specified in input
|
containerShipTypes | Ship types specified in input |
paxTugShipTypes | Ship types specified in input |
wettedSA
(vector of numericals, m^2)
This method this requires ship types to be grouped. Use the
paxTugShipTypes
, tankerBulkCarrierGCargoShipTypes
, and
containerShipTypes
grouping parameters to provide these ship
type groupings. Any ship types not included in this grouping will be
considered as miscellaneous vessels.
Container ship wetted surface area:
= 0.995(disp./lloyds draft + 1.9 * Lwl * lloyds draft)-2.4(lloyds draft-actual draft)(lwl+breadth)
Bulk carrier, tanker, and general cargo ship wetted surface area:
= 0.99(disp./lloyds draft + 1.9 * Lwl * lloyds draft)-2(lloyds draft- actual draft)(lwl+breadth)
Cruise ships and tugs treated as twin screw RORO in Kristensen formulas on the basis of sample of vessels from Lloyds and their number of propellers.
Twin Screw RORO wetted surface area:
= 1.21(disp./lloyds draft +1.3*lwl*lloyds draft)*(1.2-0.34*Cbw)-2.5(lloyds draft-actual draft)*(lwl+breadth)
Auto carriers, miscellaneous, reefer, and RORO ships are treated as single skeg ROROs in Kristensen formulas on the basis of sample of vessels from Lloyds and their number of propellers.
Single screw RORO wetted surface area:
0.87(disp./lloyds draft +2.7*lwl*lloyds draft)*(1.2-0.34*Cbw)-3.0(lloyds draft-actual draft)*(lwl+breadth)
Note: Actual draft is typically obtained from sources such as AIS messages or ship records.
Kristensen, H. O. and Lutzen, M. 2013. "Prediction of Resistance and Propulsion Power of Ships."
Kristensen, H. O. "Ship-Desmo-Tool." https://gitlab.gbar.dtu.dk/oceanwave3d/Ship-Desmo
Other Kristensen Calculations:
calcKristCaa()
,
calcKristCa()
,
calcKristCr()
,
calcKristPwr()
,
calcKristThrustFactor()
,
calcKristTotalRes()
,
calcKristWakeFrac()
calcKristWettedSA("bulk.carrier", 80097, 13.6, 12.5, 218, 32.25, 0.8099003, 1.025)#> [1] 10714.62calcKristWettedSA("other.tanker", 238942, 15.6, 14, 400, 49, 0.7490287, 1.025, tankerBulkCarrierGCargoShipTypes=c("other.tanker","bulk.carrier"))#> [1] 25094.42calcKristWettedSA("container.ship", 238942, 15.6, 14, 400, 49, 0.7490287, 1.025)#> [1] 24941.06