Creating the Reports for the Performance Data

The propeller performance data consists of the advance coefficient, the thrust coefficient, the torque coefficient, and the open water efficiency.

For this case, a custom field function that specifies the value of density is provided for you.

Thrust Coefficient

The thrust coefficient, $K_{T}$ , is defined as:

K_{T} = \frac{T}{ρ \cdot n^{2} \cdot D^{4}}

(5257)

where:

In order to calculate this value, you must first calculate the thrust that the propeller generates. Create the report for the thrust:

Select the T report and set the following properties:


Property	Setting
Direction	[1.0, 0.0, 0.0]
Parts	[Rotating Region: Blades, Rotating Region: Hub]

The torque coefficient, $K_{Q}$ , is defined as:

K_{Q} = \frac{Q}{ρ \cdot n^{2} \cdot D^{5}}

(5258)

where:

In order to calculate this value, you must first calculate the torque that the propeller generates. Create the report for the torque:

Select the Q report and set the following properties:


Property	Setting
Axis	[-1.0, 0.0, 0.0]
Parts	[Rotating Region: Blades, Rotating Region: Hub]

The open water efficiency, $η_{O}$ , is defined as:

η_{O} = \frac{J}{2 π} \cdot \frac{K_{T}}{K_{Q}}

(5259)

where:

Create the report for the open water efficiency:

Right-click Reports and select New > Expression.
Rename this report to J.
Select the J report and set Definition to $J.
Right-click Reports and select New > Expression.
Rename this report to hO.
Select the hO report and set Definition to ($KTReport/$KQReport)*($JReport/(2*3.1428571429)).