1. Key Laboratory of Magnetic Levitation Technologies and Maglev Trains, Ministry of Education of China, Chengdu 610064, China;
2. Superconductivity and New Energy R&D Center, Southwest Jiao Tong University, Chengdu 610064, China;
3. Institute of Nuclear Science and Technology, Sichuan University, Chengdu 610064, China
Abstract In this study, finite element analysis (FEA) has been used to investigate the effects of different Laval nozzle throat sizes on supersonic molecular beam. The simulations indicate the Mach numbers of the molecular stream peak at different positions along the center axis of the beam, which correspond to local minimums of the molecular densities. With the increase of the throat diameter, the first peak of the Mach number increases first and then decreases, while that of the molecular number density increases gradually. Moreover, both first peaks shift progressively away from the throat. At the last part, we discuss the possible applications of our FEA approach to solve some crucial problems met in modern transportations.
This work is financially supported by the Science Foundation for International Cooperation of Sichuan Province (2014HH0016), the Fundamental Research Funds for the Central Universities (SWJTU2014: A0920502051113-10000), National Magnetic Confinement Fusion Science Program (2011GB112001).