本文主要研究内容
作者易淼荣（2019）在《高超声速边界层转捩及控制研究》一文中研究指出：边界层转捩对高超声速飞行器的性能和安全性具有重要影响,而高超声速边界层转捩的研究及控制目前面临工程应用需求紧迫,理论认识不够充分,风洞模拟参数不全面,数值模拟亟待进一步发展的现状。本文基于吸气式高超声速飞行器对强制转捩的需求,首先建立了一种可同时模拟自然转捩和强制转捩的数值方法:基于IDDES框架的γ-Re_θ转捩模型,该方法能够在较低网格需求下对边界层转捩过程中较大扰动的发展失稳过程进行捕捉;然后分别针对自然转捩、被动控制诱导的强制转捩和主动控制诱导的强制转捩进行了研究,一方面表明本文建立的数值模拟方法具备模拟自然转捩和强制转捩的能力,另一方面对转捩过程中的扰动发展及涡结构进行了分析,发现了几个影响转捩过程的关键因素;最后针对一种进气道构型,提出了一种主动喷射诱导进气道边界层强制转捩方案,并将其与被动控制诱导转捩方案进行了对比。本文一共分为七章,内容安排如下:第一章是引言,介绍了高超声速边界层转捩研究的背景和意义,从边界层失稳机制、强制转捩和转捩预测方法三个方面介绍了高超声速边界层转捩的研究现状,最后对本文的主要工作进行了介绍。第二章是计算方法,首先从γ-Re_θ转捩模型、转捩模型与IDDES方法的结合、IDDES方法中网格尺度的改进和五阶WENO-RL重构几个方面详细介绍了本文提出的基于IDDES框架的γ-Re_θ转捩模型;然后进行了一系列验证算例的计算,从无粘通量重构方法、时间推进方法、对湍流中大尺度涡结构的捕捉能力、对自然转捩模拟的能力以及对粗糙颗粒诱导的强制转捩模拟的能力等方面对计算方法进行了一一验证。第三章采用风洞试验和数值模拟相结合的方法对高焓污染组分来流条件下Ma 6尖前缘平板边界层内扰动波的发展直至失稳过程进行了研究。试验通过ALTP热流传感器测量到了壁面热流平均值、热流脉动RMS值,通过对热流脉动进行分析,得到了不稳定波的频率和传播速度,通过双谱分析发现转捩过程中不稳定波之间存在非常复杂的非线性耦合关系。数值模拟则通过在上游壁面加入吹吸扰动来研究不稳定波的发展规律,模拟得到的高频模态扰动波频率与传播速度均与试验吻合良好,但由于来流扰动存在差别,数值模拟无法复现试验结果中出现的较低频的扰动峰值。数值模拟还通过不同的扰动添加方式,得到了K型转捩和亚谐型转捩,并且对比了污染组分和壁温对不稳定波发展的影响,结果显示在污染组分来流中,不稳定波增长更快,边界层转捩更早,而壁温影响规律则与线性稳定性理论相吻合。第四章针对被动控制诱导的强制转捩进行了数值模拟研究,采用本文建立的基于IDDES框架的γ-Re_θ转捩模型,首先对单个圆柱形粗糙颗粒诱导BAM6QT中的边界层转捩算例进行模拟,从脉动RMS值,脉动主频和边界层内平均流场等方面均与试验进行了比较,还进行了网格无关性验证。其次对斜坡形转捩带诱导高超声速进气道强制转捩的算例进行了模拟研究,更改了IDDES方法中的网格尺度后,得到了与试验一致的转捩位置。针对以上两个算例,本章还从涡结构和扰动两个角度分析了流向涡的形成及二次失稳导致转捩的过程,发现由粗糙颗粒上缘引起的剪切层导致的马蹄涡头部(对应低速条带)在向下游发展的过程中逐步耗散,而处于边界层底部的高速条带在转捩中扮演重要角色,高速条带位置上的非定常扰动在展向开始互相接触时往往代表着流向涡结构二次失稳的开始。第五章针对主动喷射诱导Ma 10来流条件下进气道强制转捩算例进行了数值模拟研究,首先选取了四个喷射压比下的试验工况进行模拟,仍通过更改IDDES方法中的网格尺度后,得到了与试验吻合较好的转捩位置;然后研究了喷孔间距对强制转捩的影响,发现喷孔间距存在最优范围,合理安排喷孔间距可有效促进转捩位置前移;最后尝试通过双排喷射、喷射气态煤油等措施来进一步增强强制转捩效果,取得了一定成效。同时在对这些算例进行涡结构和扰动两个方面的分析后,发现扰动在边界层内的法向位置对边界层转捩有重要影响,往往失稳位置越靠近边界层底部,转捩越容易发生。第六章则基于主动喷射诱导强制转捩的研究结果,针对第四章中的进气道构型,提出了一种主动喷射诱导强制转捩的方案,在保持强制转捩效果差别不大的情况下,通过数值模拟对主动/被动控制诱导强制转捩方式在失稳机制、附加效应等方面进行了详细的对比。对比结果表明在热环境上主动喷射有较明显优势,再结合主动喷射本身具有的可灵活控制的先天优势,体现了其作为未来强制转捩装置的潜力。第七章为结束语,总结了本文主要结果和创新点,并指出了工作中存在的不足及今后的研究方向。
Abstract
bian jie ceng zhuai lie dui gao chao sheng su fei hang qi de xing neng he an quan xing ju you chong yao ying xiang ,er gao chao sheng su bian jie ceng zhuai lie de yan jiu ji kong zhi mu qian mian lin gong cheng ying yong xu qiu jin pai ,li lun ren shi bu gou chong fen ,feng dong mo ni can shu bu quan mian ,shu zhi mo ni ji dai jin yi bu fa zhan de xian zhuang 。ben wen ji yu xi qi shi gao chao sheng su fei hang qi dui jiang zhi zhuai lie de xu qiu ,shou xian jian li le yi chong ke tong shi mo ni zi ran zhuai lie he jiang zhi zhuai lie de shu zhi fang fa :ji yu IDDESkuang jia de γ-Re_θzhuai lie mo xing ,gai fang fa neng gou zai jiao di wang ge xu qiu xia dui bian jie ceng zhuai lie guo cheng zhong jiao da rao dong de fa zhan shi wen guo cheng jin hang bu zhuo ;ran hou fen bie zhen dui zi ran zhuai lie 、bei dong kong zhi you dao de jiang zhi zhuai lie he zhu dong kong zhi you dao de jiang zhi zhuai lie jin hang le yan jiu ,yi fang mian biao ming ben wen jian li de shu zhi mo ni fang fa ju bei mo ni zi ran zhuai lie he jiang zhi zhuai lie de neng li ,ling yi fang mian dui zhuai lie guo cheng zhong de rao dong fa zhan ji guo jie gou jin hang le fen xi ,fa xian le ji ge ying xiang zhuai lie guo cheng de guan jian yin su ;zui hou zhen dui yi chong jin qi dao gou xing ,di chu le yi chong zhu dong pen she you dao jin qi dao bian jie ceng jiang zhi zhuai lie fang an ,bing jiang ji yu bei dong kong zhi you dao zhuai lie fang an jin hang le dui bi 。ben wen yi gong fen wei qi zhang ,nei rong an pai ru xia :di yi zhang shi yin yan ,jie shao le gao chao sheng su bian jie ceng zhuai lie yan jiu de bei jing he yi yi ,cong bian jie ceng shi wen ji zhi 、jiang zhi zhuai lie he zhuai lie yu ce fang fa san ge fang mian jie shao le gao chao sheng su bian jie ceng zhuai lie de yan jiu xian zhuang ,zui hou dui ben wen de zhu yao gong zuo jin hang le jie shao 。di er zhang shi ji suan fang fa ,shou xian cong γ-Re_θzhuai lie mo xing 、zhuai lie mo xing yu IDDESfang fa de jie ge 、IDDESfang fa zhong wang ge che du de gai jin he wu jie WENO-RLchong gou ji ge fang mian xiang xi jie shao le ben wen di chu de ji yu IDDESkuang jia de γ-Re_θzhuai lie mo xing ;ran hou jin hang le yi ji lie yan zheng suan li de ji suan ,cong mo nian tong liang chong gou fang fa 、shi jian tui jin fang fa 、dui tuan liu zhong da che du guo jie gou de bu zhuo neng li 、dui zi ran zhuai lie mo ni de neng li yi ji dui cu cao ke li you dao de jiang zhi zhuai lie mo ni de neng li deng fang mian dui ji suan fang fa jin hang le yi yi yan zheng 。di san zhang cai yong feng dong shi yan he shu zhi mo ni xiang jie ge de fang fa dui gao han wu ran zu fen lai liu tiao jian xia Ma 6jian qian yuan ping ban bian jie ceng nei rao dong bo de fa zhan zhi zhi shi wen guo cheng jin hang le yan jiu 。shi yan tong guo ALTPre liu chuan gan qi ce liang dao le bi mian re liu ping jun zhi 、re liu mai dong RMSzhi ,tong guo dui re liu mai dong jin hang fen xi ,de dao le bu wen ding bo de pin lv he chuan bo su du ,tong guo shuang pu fen xi fa xian zhuai lie guo cheng zhong bu wen ding bo zhi jian cun zai fei chang fu za de fei xian xing ou ge guan ji 。shu zhi mo ni ze tong guo zai shang you bi mian jia ru chui xi rao dong lai yan jiu bu wen ding bo de fa zhan gui lv ,mo ni de dao de gao pin mo tai rao dong bo pin lv yu chuan bo su du jun yu shi yan wen ge liang hao ,dan you yu lai liu rao dong cun zai cha bie ,shu zhi mo ni mo fa fu xian shi yan jie guo zhong chu xian de jiao di pin de rao dong feng zhi 。shu zhi mo ni hai tong guo bu tong de rao dong tian jia fang shi ,de dao le Kxing zhuai lie he ya xie xing zhuai lie ,bing ju dui bi le wu ran zu fen he bi wen dui bu wen ding bo fa zhan de ying xiang ,jie guo xian shi zai wu ran zu fen lai liu zhong ,bu wen ding bo zeng chang geng kuai ,bian jie ceng zhuai lie geng zao ,er bi wen ying xiang gui lv ze yu xian xing wen ding xing li lun xiang wen ge 。di si zhang zhen dui bei dong kong zhi you dao de jiang zhi zhuai lie jin hang le shu zhi mo ni yan jiu ,cai yong ben wen jian li de ji yu IDDESkuang jia de γ-Re_θzhuai lie mo xing ,shou xian dui chan ge yuan zhu xing cu cao ke li you dao BAM6QTzhong de bian jie ceng zhuai lie suan li jin hang mo ni ,cong mai dong RMSzhi ,mai dong zhu pin he bian jie ceng nei ping jun liu chang deng fang mian jun yu shi yan jin hang le bi jiao ,hai jin hang le wang ge mo guan xing yan zheng 。ji ci dui xie po xing zhuai lie dai you dao gao chao sheng su jin qi dao jiang zhi zhuai lie de suan li jin hang le mo ni yan jiu ,geng gai le IDDESfang fa zhong de wang ge che du hou ,de dao le yu shi yan yi zhi de zhuai lie wei zhi 。zhen dui yi shang liang ge suan li ,ben zhang hai cong guo jie gou he rao dong liang ge jiao du fen xi le liu xiang guo de xing cheng ji er ci shi wen dao zhi zhuai lie de guo cheng ,fa xian you cu cao ke li shang yuan yin qi de jian qie ceng dao zhi de ma ti guo tou bu (dui ying di su tiao dai )zai xiang xia you fa zhan de guo cheng zhong zhu bu hao san ,er chu yu bian jie ceng de bu de gao su tiao dai zai zhuai lie zhong ban yan chong yao jiao se ,gao su tiao dai wei zhi shang de fei ding chang rao dong zai zhan xiang kai shi hu xiang jie chu shi wang wang dai biao zhao liu xiang guo jie gou er ci shi wen de kai shi 。di wu zhang zhen dui zhu dong pen she you dao Ma 10lai liu tiao jian xia jin qi dao jiang zhi zhuai lie suan li jin hang le shu zhi mo ni yan jiu ,shou xian shua qu le si ge pen she ya bi xia de shi yan gong kuang jin hang mo ni ,reng tong guo geng gai IDDESfang fa zhong de wang ge che du hou ,de dao le yu shi yan wen ge jiao hao de zhuai lie wei zhi ;ran hou yan jiu le pen kong jian ju dui jiang zhi zhuai lie de ying xiang ,fa xian pen kong jian ju cun zai zui you fan wei ,ge li an pai pen kong jian ju ke you xiao cu jin zhuai lie wei zhi qian yi ;zui hou chang shi tong guo shuang pai pen she 、pen she qi tai mei you deng cuo shi lai jin yi bu zeng jiang jiang zhi zhuai lie xiao guo ,qu de le yi ding cheng xiao 。tong shi zai dui zhe xie suan li jin hang guo jie gou he rao dong liang ge fang mian de fen xi hou ,fa xian rao dong zai bian jie ceng nei de fa xiang wei zhi dui bian jie ceng zhuai lie you chong yao ying xiang ,wang wang shi wen wei zhi yue kao jin bian jie ceng de bu ,zhuai lie yue rong yi fa sheng 。di liu zhang ze ji yu zhu dong pen she you dao jiang zhi zhuai lie de yan jiu jie guo ,zhen dui di si zhang zhong de jin qi dao gou xing ,di chu le yi chong zhu dong pen she you dao jiang zhi zhuai lie de fang an ,zai bao chi jiang zhi zhuai lie xiao guo cha bie bu da de qing kuang xia ,tong guo shu zhi mo ni dui zhu dong /bei dong kong zhi you dao jiang zhi zhuai lie fang shi zai shi wen ji zhi 、fu jia xiao ying deng fang mian jin hang le xiang xi de dui bi 。dui bi jie guo biao ming zai re huan jing shang zhu dong pen she you jiao ming xian you shi ,zai jie ge zhu dong pen she ben shen ju you de ke ling huo kong zhi de xian tian you shi ,ti xian le ji zuo wei wei lai jiang zhi zhuai lie zhuang zhi de qian li 。di qi zhang wei jie shu yu ,zong jie le ben wen zhu yao jie guo he chuang xin dian ,bing zhi chu le gong zuo zhong cun zai de bu zu ji jin hou de yan jiu fang xiang 。
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论文作者分别是来自军事科学院的易淼荣，发表于刊物军事科学院2019-09-02论文，是一篇关于边界层转捩论文,强制转捩论文,高超声速论文,转捩模型论文,军事科学院2019-09-02论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自军事科学院2019-09-02论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。
标签：边界层转捩论文; 强制转捩论文; 高超声速论文; 转捩模型论文; 军事科学院2019-09-02论文;