The Design – Analysis of a Whirl Wind Propeller Simulation | ANSYS CFX
A propeller is a device with a rotating hub and radiating blades that are set at a pitch to form a helical spiral, that, when rotated, performs an action that is similar to Archimedes’ screw. It transforms rotational power into linear thrust by acting upon a working fluid, such as water or air. The rotational motion of the blades is converted into thrust by creating a pressure difference between the two surfaces. A given mass of working fluid is accelerated in one direction and the craft moves in the opposite direction. Propeller dynamics, like those of aircraft wings, can be modeled by Bernoulli’s principle and Newton’s third law. Most marine propellers are screw propellers with helical blades rotating on a propeller shaft with an approximately horizontal axis.
In this analysis, it has been tried to simulate and analyze a whirlwind propeller using Ansys CFX software.
Geometry & Grid
The geometry required for this analysis was generated by Ansys Design Modeler software. The meshing required for this analysis was also generated by Ansys Meshing software. The mesh type used in this analysis is unstructured. The total number of volume properties for geometry is 2,8963e+008 mm³.
In this analysis, a steady-state analysis type was used to obtain the results to check the fluid flow. In this analysis, non-buoyant models have been used and stationary domain motion has also been activated in this analysis. In this analysis, a k-Epsilon model was used to study the air at 25 C flow and total energy fluid models of the heat transfer.
In this analysis, an air inlet, which only includes the air at 25 C, is defined as a velocity inlet. The normal speed value of mass and momentum velocity inlet is 6 [m s^-1]. The turbulence of the design modeler is set as a medium with an intensity equal to 5 %.
In this analysis, an air inlet, which only includes the air at 25 C, is defined as a velocity outlet. The average static pressure for the design modeler is set as relative static pressure equal to 0 Pa.
Discretization of Equations
In this analysis, high-resolution is used for the advection scheme of the basic settings. In this analysis, the first-order is used for turbulence numerics. In this analysis, the residual type of convergence criteria is RMS and the residual target of convergence criteria is 1.E-4.
The results are presented as density contours.
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