Doctoral Degree in Engineering
西安交通大学
西安交通大学
Gender:Male
Business Address:南京航空航天大学明故宫校区10号楼517
E-Mail:
Affiliation of Author(s):能源与动力学院
Journal:AEROSPACE SCIENCE AND TECHNOLOGY
Key Words:Scramjet Maximum thrust theory Single expansion ramp nozzle Design directly Geometric constraints Method of characteristics
Abstract:A new method based on maximum thrust theory to design a two-dimensional single expansion ramp nozzle with geometric constraints directly is presented in this paper. To generate the contour of the nozzle, the inviscid flowfield is calculated by using the method of characteristics and the reference temperature method is applied to correct the boundary layer thickness. The computational fluid dynamics approach is employed to obtain the aerodynamic performance of the nozzles. The results show that the initial arc radius slightly influences the axial thrust coefficient and that the variations in the length and initial expansion angle of the cowl significantly affect the axial thrust coefficient. The nozzle designed by truncating ideal nozzle is also investigated for comparison to verify the superiority of this new method. The nozzle designed by this proposed method shows increases in the axial thrust coefficient, lift, and pitching moment of 5.5%, 1098.2% and 20.3%, respectively, at the design point. Moreover, the proposed nozzle provided the positive lift with considerable increments in the axial thrust coefficient and in the pitching moment at off-design operations. (C) 2017 Elsevier Masson SAS. All rights reserved.
ISSN No.:1270-9638
Translation or Not:no
Date of Publication:2017-07-01
Co-author:吕郑,B2017005,莫建伟
Correspondence Author:Xu Jinglei