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Calculates propeller performance and wake field properties. Controlled by executeControl: - Propeller performance - Thrust coefficient, Kt - Torque coefficient, 10*Kq - Advance coefficient, J - Open water efficiency, etaO - Written to postProcessing/<name>/<time>/propellerPerformance.dat Controlled by writeControl: - Wake field text file - Wake: 1 - UzMean/URef - Velocity in cylindrical coordinates at xyz locations - Written to postProcessing/<name>/<time>/wake.dat - Axial wake field text file - 1 - Uz/URef at r/R and angle - Written to postProcessing/<name>/<time>/axialWake.dat - Velocity surface - Written to postProcessing/<name>/surfaces/time>/disk.<fileType> Usage Example of function object specification: \verbatim propellerInfo1 { type propellerInfo; libs (forces); writeControl writeTime; patches ("propeller.*"); URef 5; // Function1 type; 'constant' form shown here rho rhoInf; // incompressible rhoInf 1.2; // Optionally write propeller performance data writePropellerPerformance yes; // Propeller data: // Radius radius 0.1; rotationMode specified; // specified | MRF // rotationMode = specified: origin (0 -0.1 0); n 25.15; axis (0 1 0); // Optional reference direction for angle (alpha) = 0 alphaAxis (1 0 0); //// rotationMode = mrf //// MRF MRFZoneName; //// (origin, n and axis retrieved from MRF model) // Optionally write wake text files // Note: controlled by writeControl writeWakeFields yes; // Sample plane (disk) properties // Note: controlled by writeControl sampleDisk { surfaceWriter vtk; r1 0.05; r2 0.2; nTheta 36; nRadial 10; interpolationScheme cellPoint; errorOnPointNotFound false; } } \endverbatim Where the entries comprise: \table Property | Description | Required | Deflt value type | Type name: propellerInfo | yes | log | Write to standard output | no | no patches | Patches included in the forces calculation | yes | p | Pressure field name | no | p U | Velocity field name | no | U rho | Density field name | no | rho URef | Reference velocity | yes | rotationMode | Rotation mode (see below) | yes | origin | Sample disk centre | no* | n | Revolutions per second | no* | axis | Propeller axis | no* | alphaAxis | Axis that defines alpha=0 dir | no | MRF | Name of MRF zone | no* | originOffset | Origin offset for MRF mode | no | (0 0 0) writePropellerPerformance| Write propeller performance text file | yes | writeWakeFields | Write wake field text files | yes | surfaceWriter | Sample disk surface writer | no* | r1 | Sample disk inner radius | no | 0 r2 | Sample disk outer radius | no* | nTheta | Divisions in theta direction | no* | nRadial | Divisions in radial direction | no* | interpolationScheme | Sampling interpolation scheme | no* | cell \endtable Note - URef is a scalar Function1 type, i.e. supports constant, table, lookup values - rotationMode is used to set the origin, axis and revolutions per second - if set to 'specified' all 3 entries are required - note: origin is the sample disk origin - if set to 'MRF' only the MRF entry is required - to move the sample disk away from the MRF origin, use the originOffset - if writePropellerPerformance is set to on|true: - propellerPerformance text file will be written - if writeWakeFields is set to on|true: - wake and axialWake text files will be written - if the surfaceWriter entry is set, the sample disk surface will be written - extents set according to the r1 and r2 entries - discretised according to the nTheta and nRadial entries
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