飞发一体化算力体系及算力参数敏感性

doi:10.7527/S1000-6893.2021.25808

Abstract

Abstract: Integration of aircraft and engine is the core and key technology for air-breathing hypersonic aircraft. In this paper, propulsion system force accounting and sensitivity analysis are carried out for the typical integrated configurations. Firstly, the axisymmetric integrated aircraft with abdomen inlet and the integrated aircraft with back inlet wing-body fusion were designed. By dividing the different parts of the integrated aircraft into aerodynamic or propulsion systems, the influence of force accounting on the aerodynamic/propulsion performance is studied. The results show that the aerodynamic/propulsion performance of the aircraft characterized by different force accounting systems maybe quite different. Comparison of the aerodynamic/propulsion performance of the aircraft must be carried out with a clear force accounting system. By using the method of orthogonal experimental design + variance analysis, the sensitivity of the aircraft force accounting to five factors, including airspace, speed domain, flight attitude, aerothermal effect, and real gas effect, is analyzed. The results show that the wall temperature is a sensitive parameter that can affect the calculation of axial force of the aircraft, and the Mach number and the attack angle affect almost all aerodynamic indicators. In the research range, the Reynolds number and gas specific heat ratio are insensitive parameters of aircraft aerodynamic performance.

Key words: aircraft/engine integration, hypersonic, force accounting system, parameter sensitivity, aerodynamic performance

CLC Number:

V221⁺.3

XIONG Bing, FAN Xiaoqiang, WEI Jinpeng, CHENG Jie, ZHAO Zhigang. Force accounting systems of aircraft/engine integration and force accounting parameter sensitivity analysis[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2021, 42(8): 525808-525808.

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Force accounting systems of aircraft/engine integration and force accounting parameter sensitivity analysis

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