Document Type : Original Article

Authors

1 School of Astronautics, Beihang University, Beijing, China

2 Aerospace Faculty of K.N. Toosi University of Technology, Tehran

3 School of Electronics, Beihang University, Beijing, China

Abstract

 In order to reduce cost and time along with enhancing the safety issues, numerical computer modelling and simulations are widely used for analyzing complex systems such as launch vehicle or spacecraft propulsion system. The objective of this research is to obtain an algorithm for simulation of staged combustion cycle liquid propellant engines. For this purpose the space shuttle main engine (SSME), as one of the world’s most complicated engines, is selected as a case study. A total of 34 elements is taken into account and using more than 100 linear/non-linear equations, the engine’s steady state system model has been established in MATLAB SIMULINK software. The simulation method uses eleven nested loops for iteration. The algorithm is based on the known parameters at the inlet of engine main feed lines namely mass flow rate and pressure, similar to the known conditions during hot test of engine on test stand. The simulation is capable of predicting the engine’s operation in wide range of thrust throttling levels from 69 percent to 109 percent of the nominal thrust. In order to validate the suggested method, SSME main component parameters, operating at 109 percent of rated thrust is presented. Simulation result mean error is less than 5 percent.

Keywords

Main Subjects

Article Title [فارسی]

A Simulation Algorithm for Staged Combustion Cycle Liquid Propellant Rocket Engines

Authors [فارسی]

  • Mahyar Naderi 1
  • Liang Guozhu 1
  • Hassan Karimi 2
  • Sara Pourdaraei 3

1 School of Astronautics, Beihang University, Beijing, China

2 Aerospace Faculty of K.N. Toosi University of Technology, Tehran

3 School of Electronics, Beihang University, Beijing, China

Abstract [فارسی]

 In order to reduce cost and time along with enhancing the safety issues, numerical computer modelling and simulations are widely used for analyzing complex systems such as launch vehicle or spacecraft propulsion system. The objective of this research is to obtain an algorithm for simulation of staged combustion cycle liquid propellant engines. For this purpose the space shuttle main engine (SSME), as one of the world’s most complicated engines, is selected as a case study. A total of 34 elements is taken into account and using more than 100 linear/non-linear equations, the engine’s steady state system model has been established in MATLAB SIMULINK software. The simulation method uses eleven nested loops for iteration. The algorithm is based on the known parameters at the inlet of engine main feed lines namely mass flow rate and pressure, similar to the known conditions during hot test of engine on test stand. The simulation is capable of predicting the engine’s operation in wide range of thrust throttling levels from 69 percent to 109 percent of the nominal thrust. In order to validate the suggested method, SSME main component parameters, operating at 109 percent of rated thrust is presented. Simulation result mean error is less than 5 percent.

Keywords [فارسی]

  • Cryogenic Propellant
  • Liquid Rocket Engines
  • Mathematical Modeling
  • Space Shuttle Main Engine
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