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In rockets with clustered multiple nozzle configurations, some engines may be ground lit and some, air lit. In such cases, it is required to keep the non-firing engines’ nozzles, devoid of any contamination which may occur due to reverse flow of plumes of firing engines. Also, the non-firing engines’ throats need to be kept below a certain temperature limit to ensure safe ignition and full length operation. Thus, the exits of these nozzles need to be protected by nozzle exit closure which can be separated on command. The design, development, and qualification of such a Nozzle Exit Closure for a 4ton payload class Launch vehicle is presented in this lecture note.

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Design, Development and Qualification of an Active Nozzle Exit Closure Separation System for a Launch Vehicle

  • 会议论文

  • 发表日期：

    2026年

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  • Gantawar Siddharth Jitendra,
  • Prakash Sahu,
  • M. D. Perwaiz Alam,
  • Shiju G. Thomas,
  • U. A. Subramanian

摘要

In rockets with clustered multiple nozzle configurations, some engines may be ground lit and some, air lit. In such cases, it is required to keep the non-firing engines’ nozzles, devoid of any contamination which may occur due to reverse flow of plumes of firing engines. Also, the non-firing engines’ throats need to be kept below a certain temperature limit to ensure safe ignition and full length operation. Thus, the exits of these nozzles need to be protected by nozzle exit closure which can be separated on command. The design, development, and qualification of such a Nozzle Exit Closure for a 4ton payload class Launch vehicle is presented in this lecture note.