PropPrelib

A library to assist with MATLAB functions for Propulsion Prelim

How to use

Download this repository as a zip folder.

Copy the +PropPrelim folder into the same directory as your scripts.

In your script write the following at the beginning:

import PropPrelim.*

Take a look in the examples folder for specific use cases.

Features

Currently implemented and planned

• Unit Systems
  • BE
  • SI
• Atmosphric Models AED 2nd. ed.
  • Standard
  • Hot
  • Cold
  • Tropic
• Engine Models AED 2nd. ed.
  • Simple High Bypass Turbofan
  • Simple Low Bypass Turbofan
  • Simple Advanced Turbojet
  • Simple Advanced Turboprop
  • Simple User Input Model (WIP)
  • Full Cycle Mixed Turbofan with Afterburner (WIP)
• Drag Models AED 2nd. ed.
  • Future Fighter
  • Current Fighter
  • AIAA 2019 Supersonic Passenger Airliner Competition Drag Model
• Design Process
  • Constraint Analysis
    • Thrust Loading/Wing Loading Conditions¹
  • Climb Scheduler
    • Minimum Time²
    • Minimum Fuel
    • Climb Schedule to Mission Leg Conversion
  • Mission Analysis
    • Manuever Fuel Consumption and Mass Fraction¹
    • Mission Leg to Constraint Conversion
    • Mission Descriptions and Automated Runthrough
  • Parametric Cycle Analysis (Design Point)
    • Mixed Turbofan with Afterburner
      • Constant Specific Heat^2,3
      • Modified Specific Heat
      • Variable Specific Heat^2,3
  • Sensitivity Analysis
  • Performance Cycle Analysis (Off Design)
    • Mixed Turbofan with Afterburner
      • Constant Specific Heat
      • Modified Specific Heat
      • Variable Specific Heat (WIP)
  • Engine Tuning
    • Installation Losses
    • Engine Scale
    • Engine Control
  • Optimization and Iterations
    • Variable Constraints
    • RFP Application Functions
    • RFP/Mission/Engine Optimization using Gradient Descent
  • Aerodynamics Utilities
    • Dynamic Pressure
    • g0 as a Function of currently selected unitsystem
    • Mass Flow Parameter
  • General Purpose
    • Flexible Argument Parser
    • Variable name Formatter
    • Struct Pretty Printer
    • Table Comparision Printer
  • Mattingly Subroutines
    • FAIR³
    • MASSFP^2,3
    • RGCOMPR^2,3
    • TURB^3,4
    • TURBC^3,4
    • FAIR_M

^{1: Not fully implemented for every input case.
2: Current Implementation may be innacurate depending in inputs.
3: Current Implementation does not correctly handle SI units.
4: Current Implementation has not been tested thoroughly either due to insufficent integration or due to insufficent example data.}

Potential Future Considerations

• Integration with AEDsys
  • ONX/REF file loading and saving
  • AEDsys Mission/Constraint Loading and Saving
• Analysis
  • Carpet Plots
  • Improved options for Mach/Altitude Plots
  • Simulink?????
• General
  • Better documentation
  • Unit testing
  • Implementation of better programming languages (C++, Python , etc...)