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CLC number: V43

On-line Access: 2019-05-06

Received: 2018-11-02

Revision Accepted: 2019-03-27

Crosschecked: 2019-04-03

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Citations:  Bibtex RefMan EndNote GB/T7714


Xun Wen


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Journal of Zhejiang University SCIENCE A 2019 Vol.20 No.5 P.347-357


Design and numerical simulation of a clamshell-shaped inlet cover for air-breathing hypersonic vehicles

Author(s):  Xun Wen, Jun Liu, Jie Li, Feng Ding, Zhi-xun Xia

Affiliation(s):  College of Aerospace Science and Engineering, National University of Defense Technology, Changsha 410073, China

Corresponding email(s):   xwentst@163.com, xiazhixun@sina.com

Key Words:  Aerodynamic configuration design, Novel inlet cover, Aerodynamic force, Heat evaluation

Xun Wen, Jun Liu, Jie Li, Feng Ding, Zhi-xun Xia. Design and numerical simulation of a clamshell-shaped inlet cover for air-breathing hypersonic vehicles[J]. Journal of Zhejiang University Science A, 2019, 20(5): 347-357.

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author="Xun Wen, Jun Liu, Jie Li, Feng Ding, Zhi-xun Xia",
journal="Journal of Zhejiang University Science A",
publisher="Zhejiang University Press & Springer",

%0 Journal Article
%T Design and numerical simulation of a clamshell-shaped inlet cover for air-breathing hypersonic vehicles
%A Xun Wen
%A Jun Liu
%A Jie Li
%A Feng Ding
%A Zhi-xun Xia
%J Journal of Zhejiang University SCIENCE A
%V 20
%N 5
%P 347-357
%@ 1673-565X
%D 2019
%I Zhejiang University Press & Springer
%DOI 10.1631/jzus.A1800620

T1 - Design and numerical simulation of a clamshell-shaped inlet cover for air-breathing hypersonic vehicles
A1 - Xun Wen
A1 - Jun Liu
A1 - Jie Li
A1 - Feng Ding
A1 - Zhi-xun Xia
J0 - Journal of Zhejiang University Science A
VL - 20
IS - 5
SP - 347
EP - 357
%@ 1673-565X
Y1 - 2019
PB - Zhejiang University Press & Springer
ER -
DOI - 10.1631/jzus.A1800620

An efficient clamshell-shaped inlet cover configuration based on a shockwave interference methodology is proposed, which has the advantage of an autonomous opening using the aerodynamic force and moment. A preliminary design method for the inlet cover is introduced and used to produce cover models of two different lengths, with contributions similar to those of cowlings, rocket fairings, shrouds, or false ogives. The clamshell-shaped inlet cover features a practical design with a wide range of applications, including utilization in air-breathing hypersonic vehicles under specific constraints. In this investigation, aerodynamic numerical simulations were conducted to evaluate the extent to which the objectives and design principles are achieved for two typical ballistic separation states. The results show that both configurations can prevent an excessive accumulation of shockwaves in the nose cone area. In addition, the inlet cover generates negative lift, which results in the generation of an opening moment. The calculated heat flux at the leading edge of the clamshell-shaped inlet cover is approximately 13 MW/m2, which is within the limit of the composite material but slightly higher than that of the stagnation point of the nose cone.

In this paper, a novel clamshell-shaped inlet cover of two profiles were developed for air-breathing hypersonic vehicles under specific constraints. To validate the inlet cover system's reliability, numerical simulation was performed using commercial software ANSYS Fluent.


创新点:1. 通过激波干扰理论模型方程,推导出环境变量与构型基本尺寸之间的关系; 2. 建立气动设计模型,成功求得助推阶段和整流罩分离状态点的气动特性; 3. 新构型减轻了整流罩系统重量,实现了自分离,简化了机械结构系统.
方法:1. 通过理论推导,得到飞行器头锥长度和进气口尺寸变化对整流罩构型设计的影响; 2. 通过数值计算,得到异形整流罩及头锥附近流场分布受设计型面的影响以及产生的适应性气动力.
结论:1. 整流罩在分离状态可产生负升力,有自动打开的趋势; 2. 减小整流罩的设计长度有利于气动减阻和降低峰值热流; 3. 整流罩前缘的极限热流约为13 MW/m2,在所选复合材料的受热范围内.


Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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