壁面催化效应对高超声速气动热影响研究
Wall catalytic effects on aerodynamic heat of hypersonic flow
查看参考文献20篇
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文摘
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高超声速飞行器壁面催化效应会导致激波层中原子在壁面处复合释热,加剧周围气动热环境。针对高超声速流动壁面催化特性,选择不同飞行马赫数及高度条件,采用完全催化和非催化两种条件对球锥模型壁面热流率进行数值模拟计算,研究壁面催化效应对气动热的影响规律。结果表明,固定飞行高度时,壁面催化效应对气动热的影响随马赫数增加而加强,Ma=25条件下驻点处完全催化与非催化热流比值高达1.92;固定飞行马赫数时,在50 km高空以上壁面催化效应对气动热的影响随高度增加而减弱;壁面催化效应不仅会影响壁面附近的流场特性及组分分布状态,而且对整个激波层都有一定的影响作用。 |
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其他语种文摘
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The wall catalytic activity of hypersonic vehicles leads the atoms produced in the shock layer recombined at the body surface,leaving the recombination energy and increasing the aerodynamic heat there.To study this crucial item,the non-catalytic and fully catalytic wall conditions are applied in the numerical simulation to calculate the heat flux on a sphere-cone model,basing on different flight Mach numbers and altitude conditions.The research indicates that the wall catalytic effects on heat flux enhance as the Mach numbers increase.The heat flux ratio of the stagnant point on account of fully catalytic versus non-catalytic wall conditions reaches up to 1.92 at Mach number 25.However,this effect tends to be weaken if the altitude increases beyond 50 km with a same flight Mach number.What is more,the wall catalytic activity can influence the flow features and species distribution inside of the whole shock layer, not just around the wall surface. |
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来源
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空气动力学学报
,2020,38(4):660-667 【核心库】
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DOI
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10.7638/kqdlxxb-2018.0130
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关键词
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高超声速
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壁面催化效应
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气动热
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数值模拟
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热流
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地址
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1.
中国航天空气动力技术研究院, 北京, 100074
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中国科学院力学研究所, 北京, 100190
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中国科学院大学工程科学学院, 北京, 100049
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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0258-1825 |
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学科
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航空 |
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基金
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国家自然科学基金
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文献收藏号
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CSCD:6828949
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