带中心支板的超燃冲压燃烧室数值研究
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- 论文作者：杨浩 ; 方祥军
- 年：2016
- 作者机构：北京航空航天大学能源与动力工程学院;
- 论文关键词：高超音速冲压燃烧室 ; 中心喷注支板 ; 凹腔
- 会议召开时间：2016-08-17
- 会议录名称：中国航天第三专业信息网第三十七届技术交流会暨第一届空天动力联合会议论文集
- 语种：中文
- 分类号：TK401
- 学会代码：HTDZ
- 会议名称：中国航天第三专业信息网第三十七届技术交流会暨第一届空天动力联合会议
- 会议地点：中国陕西西安
- 主办单位：中国航天第三专业信息网、中国航天科技集团公司科技委、中国航天科工集团公司科技委
- 学会名称：中国航天第三专业信息网
- 页数：6
- 文件大小：1484k
- 原文格式：D
- 会议级别：全国
摘要
超燃燃烧室是冲压发动机设计的难点和关键,本文研究了在高超音速来流条件下,采用带中心支板且凹腔长高比为7.5的超燃燃烧室,针对支板阻塞比、扩张段扩张角、不同燃料喷射方式以及不同燃料当量比对燃烧室相关性能的影响进行了数值研究。研究发现:支板阻塞比会对隔离段内的激波分布以及支板后缘速度分布产生明显影响,而扩张段扩张角会影响超音气流在燃烧室出口的膨胀状态;采用壁面以及中心喷注支板同时喷油方式在保持高燃烧效率的同时会扩大整个燃烧室的燃烧区域;当采用单独壁面喷油方式时,凹腔内静温分布会随着当量比的变化发生相应的改变,同时会在当量比为0.51-0.74之间时达到相对较高的燃烧效率。
引文
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[2]Rasmussen C C,Dhanuka S K,Driscoll J F.Visualization of flameholding mechanisms in a supersonic combustor using PLIF[J].Proceedings of the Combustion Institute,2007,31(2):2505-2512.
[3]Rasmussen C C,Driscoll J F,Carter C D,et al.Characteristics of Cavity-Stabilized Flames in a Supersonic Flow[J].Journal of Propulsion&Power,2005,21(4):765-768.
[4]Rasmussen,C.C.,Driscoll,J.F.,Hsu,K.Y.,Donbar,J.M.,Gruber,M.,Carter,C.D.,“Stability Limits of Cavity Stabilized Flames in Supersonic Flows”,Proc.Combustion Institute 30,2004,2825-2931.
[5]Driscoll,J.F.and Rasmussen,C.C.,“Correlation and Analysis of Blowout Limits of Flames in High-Speed Airflows”,J.Propulsion and Power,Vol.21,No.6,p.1035,2005.
[6]Driscoll,J.F.and Rasmussen,C.C.Blowout Limits of Flames in High-Speed Airflows:Critical Damkohler Number[J].American Institute of Aeronautics&Astronautics,2008,21(6):1035-1044.
[7]龚诚,孙明波,张顺平,等.超声速燃烧室氢气强迫点火过程实验[J].推进技术,2012,33(4):547-551.
[8]Hsu K Y,Carter C D,Gruber M R,et al.Experimental study of cavity-strut combustion in supersonic flow[J].Journal of Propulsion and Power,2010,26(6):1237-1246.
[9]Desikan S L N,Kurian J.Mixing Studies in Supersonic Flow Employing Strut Based Hypermixers[C]//Aiaa/asme/sae/asee Joint Propulsion Conference&Exhibit.2005.
[10]Desikan S L N,Kurian J.Strut-Based Gaseous Injection into a Supersonic Stream[J].Journal of Propulsion&Power,2006,22(2):474-477.
[11]Tam C J,Tam C J.Aerodynamic Performance of an Injector Strut for a Round Scramjet Combustor[J].2007.
[12]Tam C J,Tam C J.Fuel/Air Mixing Characteristics of Strut Injections for Scramjet Combustor Applications[J].2008.