Drag and overall aeroheating reduction of a dual-disk-dual-jet in rarefied hypersonic flow in near space

IF 5.8 1区工程技术 Q1 ENGINEERING, AEROSPACE Aerospace Science and Technology Pub Date : 2025-07-01 Epub Date: 2025-04-16 DOI:10.1016/j.ast.2025.110229

Chen Ye, Shuzhou Fang, Zijian Ni, Tianwei Liu, Shenxing Luo

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Abstract

Based on the direct simulation Monte Carlo method (DSMC), this paper studies the near-space hypersonic rarefied flowfield around the dual-disk with and without jet. The research extends the dual-disk-dual-jet configuration to near space and finds that only increasing the number of disks will no longer be a good solution for reducing drag in hypersonic rarefied flow. The study proposes a comprehensive evaluation of blunt body and forebody shock control devices for aeroheating reduction. A key finding is that an opposing jet on the first disk is crucial for the aeroheating protection of the spike-disk itself, while eliminating or weakening stagnation points on disks. The research further demonstrates that allocating the fixed jet mass flow rate to the opposing and lateral jet is an optimal strategy in hypersonic rarefied flow. This paper also shows that the jet only needs a lower mass flow rate in rarefied flow. This study investigates the performance of a dual-disk-dual-jet model in hypersonic rarefied flow in near space. Compared to the dual-disk without jet (base model), in the studied parameter range, when the pressure ratio is 0.08, the total mass flow rate of the jet is 0.0427kg/s, the drag and aeroheating reduction of the blunt body in the dual-disk-dual-jet model are reduced by 64.3 % and 86.8 %, respectively.

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近空间稀薄高超声速流动中双盘双射流的阻力和整体气动加热减小

基于直接模拟蒙特卡罗方法（DSMC），研究了带和不带射流的双盘近空间高超声速稀薄流场。研究将双盘-双射流结构扩展到近空间，发现仅增加盘数将不再是降低高超声速稀薄流动阻力的好方法。对气动减热用钝体和前体冲击控制装置进行了综合评价。一个关键的发现是，第一个圆盘上的反向射流对尖形圆盘本身的气动加热保护至关重要，同时消除或削弱了圆盘上的滞止点。研究进一步表明，在高超声速稀薄流动中，将固定射流质量流量分配给相对射流和侧向射流是一种最优策略。在稀薄流动中，射流只需要较低的质量流量即可。研究了双盘双射流模型在近空间高超声速稀薄流动中的性能。与无射流双盘（基础模型）相比，在所研究的参数范围内，当压力比为0.08，射流总质量流量为0.0427kg/s时，双盘双射流模型钝体的阻力和气动热减量分别降低了64.3%和86.8%。

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来源期刊

Aerospace Science and Technology 工程技术-工程：宇航

CiteScore

10.30

自引率

28.60%

发文量

654

审稿时长

54 days

期刊介绍： Aerospace Science and Technology publishes articles of outstanding scientific quality. Each article is reviewed by two referees. The journal welcomes papers from a wide range of countries. This journal publishes original papers, review articles and short communications related to all fields of aerospace research, fundamental and applied, potential applications of which are clearly related to: • The design and the manufacture of aircraft, helicopters, missiles, launchers and satellites • The control of their environment • The study of various systems they are involved in, as supports or as targets. Authors are invited to submit papers on new advances in the following topics to aerospace applications: • Fluid dynamics • Energetics and propulsion • Materials and structures • Flight mechanics • Navigation, guidance and control • Acoustics • Optics • Electromagnetism and radar • Signal and image processing • Information processing • Data fusion • Decision aid • Human behaviour • Robotics and intelligent systems • Complex system engineering. Etc.