It's better to bury the RRF body into the way and define any walls that it crosses as Stators (in the Wall boundary condition).
If you are performing an internal calculation with a RRF, then best practice is to still extend the RRF body beyond the rotating impeller, even if it goes into the solid housing around it. I also typically recommend to define a volumetric mesh control using the RRF cylinder for these solutions. Thus having a few (say 2-3) computational cells between the rotating impeller body and the diameter of the rotating RF cylinder is of utmost importance. The idea here is that you are solving the RRF separately from the global (rectangular) computational domain and the solver needs to transfer information back and forth. Thust would come from Force surface goal.īecause you are solving this problem using a rotating reference frame (RRF) approach, then in Step 2, you should make the cylindrical sketch (representing the RRF) slightly larger than the rotating propeller. On the first page of the wizard (Project Name), name your project and click Next. Once it is loaded, select the Flow Simulation tab and click the Wizard button to start the Flow Simulation Wizard. Once again, Best thrust with less torque is the best choice. Load up the Flow Simulation add-in by clicking Tools > Add-ins and checking the SOLIDWORKS Flow Simulation box. Take the best result from above and define a new parametric study.įix speed of advance (-Vz) and check a range of RPM around the required one. The goal is to overcome the hull drag, with the minimum required torque. Then, with fixed RPM, a range of fluid speeds around the required Ship speed, must be studied(-Vz in this model). Īs first step, an initial guess of the ship service speed, propeller RPM and hull drag must be known.
If SolidWorks Flow Simulation is not in the list, you need to install SolidWorks Flow Simulation first. 2 Check the checkboxes next to SolidWorks Flow Simulation. Figure 2.8 Renaming the sketch for boundary layer velocity profiles. In quite a rough way the thing would go as follows. If SolidWorks Flow Simulation is properly installed, the Flow Simulation menu appears on the SolidWorks menu bar. It means that flow motion, thrust and torque are going to be computed for the "static" propeller condition which for most cases is not practical.įor a real analisys, a parametric study would be the way to go.
Jehan: Define a fluid speed along the Z axis (Negative sign as it is a speed "relative" to the propeller)