Analysis of Thrust Chamber of 35 KN Cryogenic Engine and Sensitivity Analysis of Film Cooling Mass Flow Rate

Document Type : Original Article

Author
School of Aerospace Engineering, College of Interdisciplinary Science and Technology, University of Tehran, Tehran, Iran
Abstract
In this paper, using a developed software, the combustion process inside the cryogenic engine is simulated one-dimensionally and using the equilibrium solution. The propellants are kerosene_LOx. In this regard, models for combustion and nozzle analysis have been used. By using this software, initially, the behavior of the cryogenic motor at the design point is simulated. Then the sensitivity analysis has been done on the film cooling flow percentage. The results of the analysis at the design point show the accuracy of the engine performance. The results of the sensitivity analysis show that the temperature of the combustion chamber has an increasing-decreasing behavior based on the percentage of flow rate, because the fuel-to-air ratio of the combustion chamber approaches the stoichiometric number for some flow rates and then falls away, but the molar mass of the gases has changed and as a result of the impact The specific and characteristic speed of the behavior has a decreasing behavior in terms of the increase in flow rate, so that increasing the cooling percentage up to 20% reduces the specific impact by 7 seconds.
Keywords
Subjects

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Volume 4, Issue 2
March 2025
Pages 14-23

  • Receive Date 09 June 2024
  • Revise Date 19 July 2024
  • Accept Date 20 November 2024