Numerical Analysis On Aerodynamic Coupling Characteristics Of RBCC-powered Cruise Vehicle
- Paper number
IAC-07-C4.5.01
- Author
Dr. Houqing Wang, Northwestern Polytechnical University, China
- Year
2007
- Abstract
Abstract: There are strong couplings between aerodynamics and some other field or disciplinary of RBCC-powered hypersonic cruise vehicle. If this full paper, the couplings among aerodynamics, structure, mass distribution, propulsion system and flight trajectory have been roundly analyzed from the aspect of general design. Based on equal shock intensity theory and some experiential relations, a 2-D figuration of the cruise vehicle powered by RBCC is gotten. Design points are based on cruising at 25km height with 6 Mach number, and 0°angle of attack. Numerical calculation on the full-scale vehicle based on 2-D inviscid compressible flow theory and one-step finite rate chemistry model has been done to analyze the coupling characteristics between aerodynamics and propulsion system when the angle of attack and the fuel is changed. The change rules of aerodynamic parameters including lift coefficient, drag coefficient and pitch moment coefficient have been analyzed. Angle of attack is changed from 0° to 5° while the step is 1°, and fuel ejected in combustor is set as 0kg/s, 0.3kg/s, 0.5kg/s and 1.0kg/s respectively. Results show that with the increase of attack angle, lift, drag will increase and pitching moment will decrease, while lift-to-drag increase rapidly firstly and then reach a maximum; With the increase of propellant mass, lift and lift-to-drag will augment and pitching moment will decrease, while drag will change little. Results will be the forceful foundations to improve and optimize vehicle shape design, mass distribution design, propulsion system design and so on, while vehicle design engineers should consider the aerodynamic coupling characteristics in building the control models.
Key Words: cruise vehicle; aerodynamic parameter; coupling characteristics
- Abstract document
- Manuscript document
IAC-07-C4.5.01.pdf (🔒 authorized access only).
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