LAPCAT II : towards a Mach 8 civil aircraft concept, using advanced Rocket/Dual-mode ramjet propulsion system

2009 ◽  
Author(s):  
Laurent Serre ◽  
Sabastien Defoort
Keyword(s):  
Propulsion System ◽  
Dual Mode ◽  
Civil Aircraft

A Study of Two Variable Cycle Engine Concepts for High Speed Civil Aircraft

2020 ◽  
Author(s):  
Jiyuan Zhang ◽  
Min Chen ◽  
Hailong Tang ◽  
Xin Liu
Keyword(s):  
High Speed ◽  
Engine Performance ◽  
Propulsion System ◽  
Parameter Determination ◽  
Control Law ◽  
Performance Requirement ◽  
Civil Aircraft ◽  
Matching Mechanism ◽  
Aircraft Propulsion System ◽  
Cycle Parameter

Abstract High speed civil aircraft has become a promising field with the development of globalization. The propulsion system is an indispensable part of the aircraft. Conventional engines have difficulty meeting the performance requirement of the high-speed civil aircraft. In this article, two variable cycle engines were studied to preliminarily as aircraft propulsion system. Their performance and matching mechanism were analyzed and compared with each other. Firstly, the cycle parameters design was conducted to explain the principle of cycle parameter determination for the high-speed civil aircraft. Secondly, the control law of variable geometry components was studied to optimize engine performance during supersonic cruising. Finally, the throttling process with constant airflow was studied to solve the problem of thrust surplus during subsonic cruising. According to this study, given same cycle parameters, the engine with variable fan stage can produce equal or slightly higher thrust with slightly less fuel consumption than the engine with core-driven-fan stage. The engine with core-driven-fan stage has advantages in aero-dynamical stabilities. It can also throttle to slightly lower thrust level during subsonic cruising. Considering the advantages in performance and derived development comprehensively, the engine with variable fan stage is a better option for high speed civil aircraft.

scholarly journals A Dual Mode Propulsion System for Small Satellite Applications

Aerospace ◽  
2018 ◽  
Vol 5 (2) ◽  
pp. 52 ◽  
Author(s):  
Kevin Gagne ◽  
M. McDevitt ◽  
Darren Hitt
Keyword(s):  
Propulsion System ◽  
Small Satellite ◽  
Dual Mode ◽  
Satellite Applications

Rendez vous with Saturn's rings

1984 ◽  
Vol 75 ◽  
pp. 743-759 ◽  
Author(s):  
Kerry T. Nock
Keyword(s):  
Solar Energy ◽  
Electric Propulsion ◽  
Power Source ◽  
Propulsion System ◽  
Low Thrust ◽  
Ring Plane ◽  
The Earth ◽  
Total Impulse ◽  
Saturn's Rings

ABSTRACTA mission to rendezvous with the rings of Saturn is studied with regard to science rationale and instrumentation and engineering feasibility and design. Future detailedin situexploration of the rings of Saturn will require spacecraft systems with enormous propulsive capability. NASA is currently studying the critical technologies for just such a system, called Nuclear Electric Propulsion (NEP). Electric propulsion is the only technology which can effectively provide the required total impulse for this demanding mission. Furthermore, the power source must be nuclear because the solar energy reaching Saturn is only 1% of that at the Earth. An important aspect of this mission is the ability of the low thrust propulsion system to continuously boost the spacecraft above the ring plane as it spirals in toward Saturn, thus enabling scientific measurements of ring particles from only a few kilometers.

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