空气动力学学报2026，Vol.44Issue(3)：97-108,12.DOI:10.7638/kqdlxxb-2025.0250
基于OpenCFD-Comb的高焓湍流边界层气体注入的直接数值模拟
Direct numerical simulation of gas injection into a high-enthalpy turbulent boundary layer based on OpenCFD-Comb
摘要
Abstract
Cooling-gas injection is crucial to the thermal protection of hypersonic vehicles.As a commonly used coolant,air contains N2 and O2,which exhibit different chemical reactivities under temperature conditions where N2 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 O2 injected through a slit in the fully turbulent region.Pure O2 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 O2 distribution and significantly enhanced production of atomic oxygen.Mass-fraction fluctuations of O2 and N2 are amplified,while those of N and NO are weakened.The injection strengthens chemical reactions involving O2,O and NO,but has limited effect on the relatively inactive N2 and N.Compared with species fluctuations,turbulence-chemistry coupling is more sensitive to temperature fluctuations.关键词
高焓/湍流/边界层/气体注入/直接数值模拟Key words
high-enthalpy/turbulence/boundary layer/gas injection/direct numerical simulation分类
航空航天引用本文复制引用
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):97-108,12.基金项目
国家自然科学基金NASF联合基金项目(U2530206) （U2530206）
国家自然科学基金重点项目(12232018) （12232018）
中科院先导项目(XDB0620203) （XDB0620203）
