Propulsion System Flow Stability Program (Dynamic). Part XVII. Propulsion System Simulation Digital Computer Program Format and Routines
Report Number: AFAPL TR 68-142 Part XVII Author(s): Kaplan, Earl H. Wong, Heeman W. Corporate Author: North American Rockwell Corp Los Angeles CA Los Angeles Div Laboratory: Air Force Aero Propulsion Laboratory Date of Publication: 1968-12 Pages: 137 Contract: F33615-67-C-1848 AD Number: AD0859282
Abstract: The primary objective of Task 7 of the "Propulsion System Flow Stability Program" was to develop a simulation program to be used in Phase II for the evaluation of two control systems capable of sensing and accommodating a transient condition. Since the work on this task was being performed by three companies, every effort was made to insure compatibility in terminology, units, and program documentation as well as to provide means of communicating the myriad details involved in making computer runs of the system. This documentation format is described in Section II of this volume. An early element of this task was the selection of a simulation language for use in programming the simulation. The choice of IBM's DSL/90 and the factors involved in making that choice are discussed in Section III. Simulation programs have a natural tendency to be rather voluminous and, when the system being simulated is as complex as a supersonic inlet, turbofan, and an integrated control system can be, computer storage space is rapidly filled. To alleviate this crowding, numerous logic blocks which were repetitive, such as compressor logic, were removed from the simulation logic deck and made into subroutines or functions. These subprograms are discussed in Section IV. Once the simulation logic is written, the most difficult task of all begins. The job of initialization is usually not given proper emphasis until many hours of work have convinced all concerned that it is really the most important phase. Section V discusses this task and shows an example of an initialization routine.
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This report has the following parts/volumes:
Propulsion System Flow Stability Program (Dynamic). Part VIII. Model for Predicting Compressor Performance with Combined Circumferential and Radial Distortion - Computer Program.
AFAPL TR 68-142 Part VIII
Propulsion System Flow Stability Program (Dynamic). Part XII. Unsteady Combustion in Duct Burners and Afterburners
AFAPL TR 68-142 Part XII
Propulsion System Flow Stability Program (Dynamic). Part XVI. Survey of Sensors Applicable to the Control of Aircraft Propulsion Systems
AFAPL TR 68-142 Part XVI
Propulsion System Flow Stability Program (Dynamic). Part XX. Computer Programs for the Root Locus Analysis of Linearized Turbojet and Turbofan Control Systems
AFAPL TR 68-142 Part XX