| Citation: | LI Xintian, CHEN Xinmin, CHEN Shili, et al. Optimal analysis of design point performance of ducted rocket[J]. Journal of Beijing University of Aeronautics and Astronautics, 2021, 47(10): 1989-1995. doi: 10.13700/j.bh.1001-5965.2020.0378(in Chinese)
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Aimed at range optimization requirements of vehicle with ramjet, an evaluation method based on the vehicle-ramjet performance factor is proposed. Performance prediction model and optimization design process of ducted rocket are developed. These provide support for the integrated optimization design of vehicle and ramjet. According to the analysis results of ramjet performance with boron-based fuel rich propellant, under the same Mach number and excess air coefficient, the change of specific impulse caused by height variation is not obvious. Under the same Mach number, the specific impulse increases first and then decreases with the increase of excess air coefficient. Under the same excess air coefficient, the specific impulse decreases with the increase of Mach number. With the increase of the Mach number and excess air coefficient, vehicle-ramjet performance factor increases first and then decreases. The vehicle-ramjet performance factor reaches a maximum under certain Mach number and excess air coefficient.
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