This Body Force Propeller method allows you to model the propeller and hull interaction without the added cost of modelling the propeller geometry with a fine mesh and smaller time scales. We will for the implementation of self-propulsion for marine application focus on the Virtual Disk model. For a general overview of Rotating Flow, please refer to Rotating Flow Part 2. The complexity and numerical effort are ascending in list above.
#Propulsion time calc full#
In order to take into account the full effect of the propeller, including the blade/rudder and blade/hull interactions, you can implement a rigid body rotation to the propeller disk region, as set up in the second approach.
If a higher fidelity simulation is necessary, the average effect of the propeller can be modeled using the Moving Reference Frame (MRF) approach.Virtual Disk: This model automatically generates a momentum source according to some geometric parameters and a propeller performance curve.The simplest approach is to model the propeller as a momentum source in a cylindrical region representing the propeller disk, using a propulsion force.Simcenter STAR-CCM+ provides a methodology by which you can predict the speeds: We can predict the speed with which a ship hull moves through water in response to the thrust supplied by a spinning propeller, or determine which propeller speed is needed to balance resistance and thrust at a prescribed trail speed.
Yet, only together with self-propulsion simulation we can fully predict the powering performance of full-scale ships. With the possibility to simulate ship resistance and wake field, naval architects get access to detailed flow behavior.
0 kommentar(er)
