2012

Pressure Ratio to Thermal Environments

A pressure ratio to thermal environments (PRatTlE.pl) program is a Perl language code that estimates heating at requested body point locations by scaling the heating at a reference location times a pressure ratio factor. The pressure ratio factor is the ratio of the local pressure at the reference point and the requested point from CFD (computational fluid dynamics) solutions.

This innovation provides pressure ratio-based thermal environments in an automated and traceable method. Previously, the pressure ratio methodology was implemented via a Microsoft Excel spreadsheet and macro scripts. PRatTlE is able to calculate heating environments for 150 body points in less than two minutes.

PRatTlE is coded in Perl programming language, is command-line-driven, and has been successfully executed on both the HP and Linux platforms. It supports multiple concurrent runs. PRatTlE contains error trapping and input file format verification, which allows clear visibility into the input data structure and intermediate calculations.

This work was done by Pedro Lopez and Winston Wang of The Boeing Co. for Johnson Space Center. For further information, contact the JSC Innovation Partnerships Office at (281) 483-3809. MSC-24963-1

White Papers

X-Ray Imaging: Emerging Digital Technology - CMOS Detectors
Sponsored by Teledyne DALSA
High-Speed A/Ds for Real-Time Systems
Sponsored by Pentek
Gearing Up for Parametric Test’s High Voltage Future
Sponsored by Keithley Instruments
Estimating the Effort and Cost of a DO-254 Program
Sponsored by Logic Circuit
Is There an Easy Way to Cut the Cost of EWIS Compliance?
Sponsored by Mentor Graphics
Force Sensors for Design
Sponsored by Tekscan

White Papers Sponsored By: