1. 中国科学院力学研究所 空天飞行高温气动全国重点实验室,北京,100190
2. 中国科学院大学 工程科学学院,北京,100049
曾广康(2001—),男,研究方向:计算流体力学. E-mail:zengguangkang@imech.ac.cn
刘洪伟*,副研究员,研究方向:计算流体力学,可压缩湍流与转捩,高性能计算. E-mail:hliu@imech.ac.cn
纸质出版:2026
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曾广康, 李新亮, 刘洪伟. 基于OpenCFD-Comb的高焓湍流边界层气体注入的直接数值模拟[J]. 空气动力学学报, 2026, 44(3): 97−108.
Zeng Guangkang, Li Xinliang, Liu Hongwei. Direct numerical simulation of gas injection into a high-enthalpy turbulent boundary layer based on OpenCFD-Comb[J]. 2026, 44(3): 97-108.
曾广康, 李新亮, 刘洪伟. 基于OpenCFD-Comb的高焓湍流边界层气体注入的直接数值模拟[J]. 空气动力学学报, 2026, 44(3): 97−108. DOI: 10.7638/kqdlxxb-2025.0250
Zeng Guangkang, Li Xinliang, Liu Hongwei. Direct numerical simulation of gas injection into a high-enthalpy turbulent boundary layer based on OpenCFD-Comb[J]. 2026, 44(3): 97-108. DOI: 10.7638/kqdlxxb-2025.0250.
空气作为飞行器热防护的常用冷却气体,其组分N
2
与O
2
在N
2
离解尚不显著的温度区间表现出明显差异的化学反应活性,厘清二者在高焓湍流边界层中的特性,对飞行器高焓工况下的工程实践具有重要意义。基于课题组自研的开源高精度化学反应湍流求解器OpenCFD-Comb,采用直接数值模拟,研究了来流马赫数10的高焓湍流平板边界层在完全湍流区通过狭缝注入O
2
后,各组分的演化以及化学反应与湍流的相互作用。模拟工况为吹吸比0.001,注入与来流温度相同的纯O
2
。结果表明:注入区域下游形成局部富氧带,导致O
2
呈现非单调分布,并显著促进了O的生成;O
2
与N
2
的质量分数脉动显著增强,而N与NO的质量分数脉动相对减弱;O
2
注入加强了O
2
、O、NO的化学反应,对不活跃的N
2
、N影响较小;此外,相对于质量分数脉动,湍流-化学耦合对温度脉动更为敏感。
Cooling-gas injection is crucial to the thermal protection of hypersonic vehicles. As a commonly used coolant
air contains N
2
and O
2
which exhibit different chemical reactivities under temperature conditions where N
2
dissociation is not yet significant. Understanding their behavior in high-enthalpy turbulent boundary layers is of practical importance for vehicle thermal management under realistic flight conditions. Using OpenCFD-Comb
an
open-source high-order solver for chemically reacting turbulence developed by our group
direct numerical simulations are performed to investigate species evolution and turbulence–chemistry interactions in a Mach 10 high-enthalpy turbulent boundary layer over a flat plate
with O
2
injected through a slit in the fully turbulent region. Pure O
2
is injected at the free-stream temperature with a blowing ratio of 0.001. Results show that the injection creates a localized oxygen-rich zone downstream
leading to a non-monotonic O
2
distribution and significantly enhanced production of atomic oxygen. Mass-fraction fluctuations of O
2
and N
2
are amplified
while those of N and NO are weakened. The injection strengthens chemical reactions involving O
2
O and NO
but has limited effect on the relatively inactive N
2
and N. Compared with species fluctuations
turbulence–chemistry coupling is more sensitive to temperature fluctuations.
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