Abstract
Atmosphere-Breathing Electric Propulsion(ABEP)can compensate for lost momentum of spacecraft operating in Very Low Earth Orbit(VLEO)which has been widely concerned due to its excellent commercial potential.It is a key technology to improve the capture efficiency of intakes,which collect and compress the atmosphere for ABEP.In this paper,the mechanism of the capture section affecting capture efficiency is investigated by Test Particle Monte Carlo(TPMC)simulations with 3D intake models.The inner surface smoothness and average collision number are determined to be key factors affecting capture efficiency,and a negative effect growth model is accordingly established.When the inner surface smoothness is less than 0.2,the highest capture effi-ciency and its corresponding average collision number interval are independent of the capture sec-tion's geometry and its mesh size.When the inner surface smoothness is higher than 0.2,the capture efficiency will decrease by installing any capture section.Based on the present results,the manufac-turing process and material selection are suggested to be prioritized during the intake geometry design in engineering projects.Then,the highest capture efficiency can be achieved by adjusting the length and mesh size of the capture section.
基金项目
auspices of the National Key R&D Program of China(2020YFC2201100)
National Natural Science Foundation of China(52077169)
State Key Laboratory of Electrical Insulation and Power Equipment,China(EIPE22116)
HPC Platform,Xi'an Jiaotong University,China()
NETL
NSTL
维普
万方数据