【正文】 尺寸、更高性能以滿足將來的測試需求。 關(guān)鍵詞 ： 自由射流；亞聲速；數(shù)值模擬 進(jìn)氣道 /發(fā)動(dòng)機(jī)高空模擬亞聲速自由射流試驗(yàn)數(shù)值模擬 2 Numerical Simulation of numerical Freejet Test for Inletengine Altitude Simulating Abstract With the flourish development of aviation industry, The importance of altitude simulation bee prominent. Although the equipment which have already build up and used is better than the simulated altitude test equipment which the United States, Britain and France had in the same period, in consideration of the monopolize of abroad technology and the crying needs of development of our country. There is a big difference between the aeroengine altitude simulation test equipment construction and technology. The article is based the research of abroad free jet aircraft engine altitude simulation test techniques and device, for discuss and verify preliminarily to the inlet / engine simulated altitude subsonic free jet test apparatus aerodynamic. The research mainly includes the following work. First, in accordance with the design requirements modeling the subsonic nozzle and inlet Second, meshing the experimental equipment use pointwise, and then analysing the flow characteristics of free jet by using numerical simulation. Finally through the analysis and discussion of the Mach number、density、 total pressure of inlet to verify the flow of altitude freejet test experimental equipment is reasonable. Keywords: Free jet。 本次研究主要做了以下工作，首先按照設(shè)計(jì)要求完成亞聲速噴管、實(shí)驗(yàn)艙及進(jìn)氣道建模，其次運(yùn)用 Pointwise 完成整個(gè)實(shí)驗(yàn)設(shè)備的網(wǎng)格劃分，再者采用數(shù)值仿真的分析手段對(duì)自由射流高空實(shí)驗(yàn)艙流動(dòng)特性進(jìn)行分析，最后通過對(duì)進(jìn)氣道內(nèi)馬赫數(shù)、密度、總壓的分析討論驗(yàn)證該自由射流實(shí)驗(yàn)設(shè)備流場的合理性。 沈陽航空航天大學(xué)畢業(yè)設(shè)計(jì)（論文） 3 目 錄 1 緒論 ................................................................................................................................... 5 自由射流技術(shù)研究的概述 ......................................................................................... 5 國內(nèi)外自由射流技 術(shù)研究的現(xiàn)狀及發(fā)展趨勢 ......................................................... 6 自由射流技術(shù)研究的意義 ......................................................................................... 8 本課題研究的對(duì)象及內(nèi)容 ......................................................................................... 8 2 流動(dòng)與傳熱基本方程與物理模型 ................................................................................. 10 基本控制方程 ........................................................................................................... 10 質(zhì)量方程 ............................................................................................................ 10 動(dòng)量方程 ............................................................................................................ 10 能量方程 ............................................................................................................ 12 控制方程通用形式 ............................................................................................ 12 可壓縮流動(dòng) ............................................................................................................... 12 可壓縮流動(dòng)基本關(guān)系式 .................................................................................... 12 可壓縮流動(dòng)求解 ................................................................................................ 13 湍流模型 ................................................................................................................... 13 Reynolds 時(shí)均方程方法 ..................................................................................... 13 湍流渦粘性系數(shù)法 ............................................................................................ 14 模型 ..................................................................................................................... 15 近壁區(qū)處理 ........................................................................................................ 18 入口湍流邊界條件 ............................................................................................ 20 3 模擬計(jì)算 ......................................................................................................................... 22 模型建立 ................................................................................................................... 22 亞聲速噴管的設(shè)計(jì) ............................................................................................ 22 進(jìn)氣道 /發(fā)動(dòng)機(jī)模型的設(shè)計(jì) ............................................................................... 24 高空實(shí)驗(yàn)艙模型及測試件的設(shè)計(jì) .................................................................... 26 網(wǎng)格劃分 ................................................................................................................... 27 數(shù)值計(jì)算的基本設(shè)置 ............................................................................................... 30 進(jìn)氣道 /發(fā)動(dòng)機(jī)高空模擬亞聲速自由射流試驗(yàn)數(shù)值模擬 4 4 計(jì)算結(jié)果及分析 ............................................................................................................. 35 流場垂直對(duì)稱面各云圖分布 ................................................................................... 35 進(jìn)氣道各截面云圖分布 ........................................................................................... 36 結(jié)果分析 ................................................................................................................... 40 5 結(jié)論與展望 ..................................................................................................................... 42 結(jié)論 ........................................................................................................................... 42 展望 ........................................................................................................................... 42 參考文獻(xiàn) ............................................................................................................................. 43 致 謝 ................................................................................................................................. 45 沈陽航空航天大學(xué)畢業(yè)設(shè)計(jì)（論文） 5 1 緒論 自由射流技術(shù)研究的概述 美國阿諾德工程發(fā)展中心于上世紀(jì) 60 年代開始設(shè)計(jì)和建造新型的航空發(fā)動(dòng)機(jī)高空模擬裝置 ASTF