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PowerSPECTRUM Specifications
Calculation Function Capabilities & Visualization
PowerSPECTRUM provides a list of calculation functions that are applied to selected fluid variables. Many of these functions are based on calculation of the Fourier transform using a Fast Fourier Transform (FFT) with options for windowing and user-specified frequency band divisions. Calculations can be performed on an entire field of fluid or surface data contained in a PowerFLOW measurement file, on a single time signal contained in a PowerFLOW probe measurement file, or a rake of points selected out of a PowerFLOW measurement file. Data from probes and rakes can be used to generate technical graphs using PowerSPECTRUM. Visualization and animation of fluid or surface data is performed by importing calculated data into PowerVIZ. PowerSPECTRUM also provides options to import and export text data.
Types of Calculation Functions:
- Single-Variable Statistical Calculations
- Calculation of Turbulence Statistics
- Two-Variable or Two-Point Statistical Calculations
- Single-Variable Spectrum Calculations
- Two-Variable or Two-Point Spectrum Calculations
- Spatial Wave Analysis
- Spectral Filtering
Frequency Banding Options:
- Specify Minimum and Maximum Frequency Bounds
- Select Single Band, Constant-Bandwidth Bands, Proportional Frequency Bands, or Custom User-Specified Bands
- Proportional Band options for Octave/Decade
- Custom Proportional Bands with User-Specified Reference Center Frequency and Band Scale Factor
Fourier Transform Options:
- Automatic or User-Specified Signal Windowing
- Three Smoothing Window Functions: Hanning, Welch, and Bartlett
- Non-Smoothing Window Function
Output Point Options:
- Choose to output the entire field or a specific probe
- Specify rakes of points to extract data from fluid or surface measurement files for technical graphs
Data Visualization and Graphing Options:
- Easily export data directly into PowerVIZ for additional visualization and animation options
- Use built-in graphing features to show spectra, time-series data, correlation functions, filtered data, and spatial profiles. Graphs can be saved as image files.
- Export data in a variety of text formats for graphing with other programs
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