|Table of Contents|

Ascent trajectory optimization for RBCC powered cruise vehicle(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2024年02期
Page:
49-56
Research Field:
目次
Publishing date:

Info

Title:
Ascent trajectory optimization for RBCC powered cruise vehicle
Author(s):
XU Zheng;  TAN Jianguo;  ZHANG Dongdong
Hypersonic Technology Laboratory, National University of Defense Technology, Changsha 410073, China
Keywords:
RBCC;  cruise vehicle;  climbing phase;  trajectory optimization
PACS:
V421.1
DOI:
10.3969/j.issn.1672-9374.2024.02.005
Abstract:
The climbing trajectory optimization of the vehicle employing rocket based combined cycle(RBCC)engine has been an important issue during the overall design. The pseudo-spectral method was employed to perform the trajectory optimization of RBCC cruise vehicle. Taking the consumption of propellant as the performance index and the flight attack angle as the design variable, the longitudinal plane trajectory optimization model of the vehicle was established. Aerodynamic characteristic of the vehicle and the performance of RBCC were obtained, then climbing trajectory of the vehicle was optimized. Results show that: optimal trajectory includes acceleration with constant height, climbing with constant dynamic pressure, climbing with constant speed, etc; rocket engine works in mode of open-close-open, and there is no need to adjust rocket thrust greatly; the range of the vehicle reaches 2 430 km under the condition of appropriate maximum mass flow rate of rocket engine and appropriate constraint of dynamic pressure.

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