Designing and Performance Optimization of Dual Bell Nozzle

EasyChair Preprint no. 10344

Abstract

In order to produce rocket engines with high thrust and efficiency, dual-bell nozzle design and performance optimization are essential. Using computational fluid dynamics (CFD) simulations and analytical modelling, this paper gives a thorough investigation of the design and optimization of a dual-bell nozzle. The key considerations are the geometric optimization of the nozzle contour and the performance optimization of the expansion ratio for both the primary and secondary nozzle. Analyses are also considered to be done on how the nozzle performs under different conditions of altitude, pressure, and temperature.

Dual-bell nozzles are widely used in rocket engines, particularly for high-performance liquid rocket engines. The design of a dual-bell nozzle involves the careful selection of the contour shape and expansion ratio for both the primary and secondary nozzle. The primary nozzle is designed to operate at a high pressure and temperature, while the secondary nozzle is designed to operate at a lower pressure and temperature. The combination of the two nozzles provides a significant increase in thrust and efficiency, particularly at high altitudes where the ambient pressure is low.

The optimization of a dual-bell nozzle involves the use of analytical models and CFD simulations to determine the optimal geometry and expansion ratio for each nozzle. The geometric optimization is focused on achieving a smooth transition from the primary to the secondary nozzle, while maintaining the desired expansion ratios for both nozzles. The performance optimization involves the selection of the optimal expansion ratio for both nozzles to achieve the maximum thrust and efficiency. This paper provides valuable insights into the design and optimization of dual-bell nozzles and can aid in the development of more efficient and cost-effective rocket engines.

Keyphrases: CFD, Dual Bell nozzle, Nozzle, rocket engine

@Booklet{EasyChair:10344,
  author = {Prashant Kumar Modak and Aayush Sharma Marhatta and Harsh Raj Jaiswal and Leki Wangchuk and Ajay Yadav and Dr. Dharmahinder Singh Chand},
  title = {Designing and Performance Optimization of Dual Bell Nozzle},
  howpublished = {EasyChair Preprint no. 10344},

  year = {EasyChair, 2023}}