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gsphelp  Output tables

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Simulation results can be output to tables with columns for the user-selected output parameters and each row representing an operating point. Borland Paradox (C) tables are used which can hold up to 256 columns and any number of rows. Two output tables are used for every model:

A steady state table for steady state operating point results from design point, steady state and steady state series calculations.
A transient table for the transient calculation results, which are quasi-steady state operating points at (user specified) time intervals shown in the first column.

Apart from the columns with selected output parameters and the time columns for the transient table, a comment column is added for user specified comments. The comment column automatically indicates design points in the steady state table. The rightmost 2 columns always are TSCF (thrust specific fuel consumption) and FN (net thrust) automatically added for the whole gas turbine system and usually applicable to aero-engines only.

 

After each operating point calculation, rows are automatically added (with or without confirmation) depending on the settings in Options|Output in the main window. An example of steady state tabular output is displayed in the following figure.

Table StSt Series Output

 

If you specify additional output parameters in the Output tab sheet of components while tables already exist, GSP must redefine a new output table with the new columns added. The Save/New tables menu item, used for saving existing steady state and transient data and/or defining new tables, pops-up automatically. Before the existing tables are deleted, they can optionally be saved under a user-specified name for later access with the Table button in the main window.

 

New columns with parameters composed from the existing ones, can be defined by right-clicking on any column and selecting Add Calc Column. Specify two data columns (or a single one and "unity"), the type of mathematical operator and optional exponents for both the parameters, and insert a name for the new column. The new column will be added as last column in the table. Note that composed columns should only be added after all operating points are calculated, since GSP does not automatically recalculate composed column values for rows added after adding the calculated column.

 


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