propsim 0.0.4

A simple and intuitive tool for simulating different types of aircraft engines.

propsim

A simple and intuitive tool for simulating different types of aircraft engines.

Overview

This library aims to bring a simple and intuitive way to perform computational calculations for the design and validation of the main models of aeronautical engines.

Through a core AircraftEngines class the user is able to switch between the following engine types and evaluation methodologies:

Engine Model	Functionality	Implemented function
Turbojet	Ideal Non-ideal on design Non-ideal off design	ideal_turbojet real_turbojet real_turbojet_off_design
Turbofan	Ideal Non-ideal on design Non-ideal off design	ideal_turbofan real_turbofan real_turbofan_off_design
Turboprop	Ideal Non-ideal on design	ideal_turboprop real_turboprop
Ramjet	Ideal	ideal_ramjet

Setup process

First, one must install the library using the following command in an environment containing Python 3.6 or higher.

pip install propsim

This command will install the library and its dependencies.

Usage cases

Once the library is properly installed, we have the following use cases:

1. The first one consists of carrying out a single point analysis with a fixed $\pi_c$ value. In this specific example an ideal turbofan type engine is shown.

   from propsim import AircraftEngines
   
   engines = AircraftEngines(12500)
   
   engines.ideal_turbofan(M0=0.7, gamma=1.4, cp=1004, hpr=42.8*10**6, Tt4=1850, pi_c=10, pi_f=2, alpha=5)
   

   The expected result for this test case is the following data set:

   {
   'pi_c': [10],
   'F_m0': [279.62], 
   'f': [0.03], 
   'S': [1.94e-05], 
   'eta_T': [0.52], 
   'eta_P': [0.46], 
   'eta_Total': [0.24], 
   'FR': [4.46]
   }
   

2. The second one consists of carrying out a bach analysis were $\pi_c$ values vary and so the output data can be plotted for carrying out the appropriate analysis. This feature is currently available only for the ideal turbofan, ideal turbojet and real turbojet. In this specific example an ideal turbofan type engine is also shown.

   from propsim import AircraftEngines
   
   engines = AircraftEngines(12500)
   
   engines.ideal_turbofan(M0=0.7, gamma=1.4, cp=1004, hpr=42.8*10**6, Tt4=1850, pi_c=10, pi_f=2, alpha=5, batch_size=3, min_pi_c=7, max_pi_c=15)
   

   The expected result for this test case is the following data set:

   {
   'pi_c': [7, 9.66, 12.33, 14.99], 
   'F_m0': [271.16, 278.94, 283.34, 286.05], 
   'f': [0.031, 0.032, 0.0312, 0.031],
   'S': [2.06e-05, 1.95e-05, 1.87e-05, 1.82e-05],
   'eta_T': [0.47, 0.52, 0.55, 0.57],
   'eta_P': [0.48, 0.47, 0.46, 0.45],
   'eta_Total': [0.23, 0.24, 0.25, 0.26],
   'FR': [4.17, 4.43, 4.58, 4.67]
   }