Scripting Utility

Only available in RPA Standard Edition

The scripting language provided is based on the ECMAScript scripting language, as defined in standard ECMA-262.

Scripting utility implements binding to many internal functions of RPA, so that the user can program and run the following tasks:

• load, manipulate and write configuration files
• search the thermodynamic database by species name
• get thermodynamic properties of the species
• prepare mono- bi- and multipropellant compositions
• run typical combustion problems (p,H)=const, (p,S)=const, (p,T)=const
• run typical rocket propulsion problems
• use in a custom JavaScript program all features listed above

Scripting utility can be started in either an interactive mode or a batch mode.

Built-In Functions

Besides standard ECMA-262 functions, RPA Scripting Utility provides the following built-in functions:

Function	Description
load(path_to_script)	Load external script defined by it's path. Example: load("resources/scripts/config.js");
print(parameter)	Print out the parameter in console and log file. Examples: print("Starting analysis..."); print("Is_v=" + pr.getNozzleExitSection().getIs_v().toPrecision(7));
exit() or quit()	Exit from the interactive interpreter.

API Reference

Besides standard ECMA-262 API, RPA Scripting Utility provides the following APIs:

API	Description
Configuration API	API for loading, manipulation and writing configuration files.
Thermo API	API for searching the thermodinamic database, obtaining species properties, preparing mono- bi- and multipropellant compositions.
Reaction API	API for running typical combustion problems (p,H)=const, (p,S)=const, (p,T)=const, obtaining thermodinamic properties of the reaction products.
Performance API	API for running typical rocket propulsion problems and obtaining performance parameters.

Last modified: May 14, 2011