calcKristThrustFactor.Rd
Calculate the thrust deduction factor (thrustFactor
)
(dimensionless) using the Kristensen method.
calcKristThrustFactor( shipType, breadth, lwl, Cbw, propDiam, M, nProp, tankerBulkCarrierShipTypes = c("tanker", "chemical.tanker", "liquified.gas.tanker", "oil.tanker", "other.tanker", "bulk.carrier") )
shipType | Ship type (vector of strings, see
|
---|---|
breadth | Moulded breadth (vector of numericals, m) |
lwl | Waterline Length (vector of numericals, m) (see
|
Cbw | Waterline block coefficient (vector of numericals, dimensionless)
(see |
propDiam | Propeller diameter (vector of numericals, m) (see
|
M | Fineness/slenderness coefficient (vector of numericals,
dimensionless) (see |
nProp | Number of propellers (vector of numericals, see
|
tankerBulkCarrierShipTypes | Ship types specified in input
|
thrustFactor
(vector of numericals, dimensionless)
Thrust deduction factor is a component of hull efficiency as well as a component of propeller efficiency. It describes the increase in resistance on the hull from water getting sucked back towards the propeller.
This method this requires ship types to be grouped. Use the
tankerBulkCarrierShipTypes
grouping parameters to provide these ship
type groupings. Any ship types not included in this grouping will be considered
as miscellaneous vessels.
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()
,
calcKristTotalRes()
,
calcKristWakeFrac()
,
calcKristWettedSA()
calcKristThrustFactor(c("bulk.carrier","container.ship"), c(32.25,49), c(218.75,400), c(0.8,0.75), c(6.7,9.6), c(5.2,6.7), c(1,1))#> [1] 0.1894947 0.1737646calcKristThrustFactor("bulk.carrier", 32.25, 218.75, 0.8, 6.7,5.2,1)#> [1] 0.1894947