【正文】 perty。3．針對發(fā)動機(jī)工作過程中隔離扇轉(zhuǎn)子剛?cè)狁詈咸匦砸约案綦x扇的幾何非線性彈性變形，為考察隔離扇的動態(tài)結(jié)構(gòu)強(qiáng)度和發(fā)動機(jī)動力學(xué)特性，建立了大范圍轉(zhuǎn)動的隔離扇轉(zhuǎn)子剛?cè)狁詈戏蔷€性動力學(xué)理論模型，為準(zhǔn)確計(jì)算其動力學(xué)特性奠定基礎(chǔ)。通過對燃燒過程的數(shù)值模擬計(jì)算分析了燃燒室氣流流動和燃燒性能。結(jié)果表明，燃燒室排量為 ，考慮全部損失時(shí)發(fā)動機(jī)整機(jī)的最大輸出功率為 ，有效效率為%28 W69。本文針對其性能和結(jié)構(gòu)動力學(xué)特性展開研究工作，具體研究內(nèi)容如下：1．依據(jù)發(fā)動機(jī)工作原理對整機(jī)結(jié)構(gòu)和各子系統(tǒng)進(jìn)行設(shè)計(jì)，建立了工作過程的熱力學(xué)模型、燃燒過程的三維數(shù)值模擬，校核了放熱模型。I河 北 工 業(yè) 大 學(xué)畢業(yè)設(shè)計(jì)說明書(論文) 作 者： 李銀寶 學(xué) 號： 110316 學(xué) 院： 機(jī)械學(xué)院 系( 專業(yè) )： 車輛工程 題 目： 微型轉(zhuǎn)子發(fā)動機(jī)結(jié)構(gòu)方案設(shè)計(jì)與分析 指導(dǎo)者： 石維佳 教授 評閱者： 年 月 日II微型轉(zhuǎn)子發(fā)動機(jī)結(jié)構(gòu)方案設(shè)計(jì)與分析摘要微小型機(jī)電系統(tǒng)概念的提出為微型動力系統(tǒng)的發(fā)展奠定了良好基礎(chǔ)，體積微小、儲能較高、功率輸出范圍寬且性能穩(wěn)定的特點(diǎn)，使微小型動力機(jī)械具有良好的發(fā)展前景及應(yīng)用市場，但目前該領(lǐng)域的發(fā)展還不成熟?；诖?，本文提出一種微小型隔離扇柔性轉(zhuǎn)子發(fā)動機(jī)，其中隔離扇轉(zhuǎn)子的柔性特點(diǎn)使其具有諸多獨(dú)特優(yōu)勢。以上述模型計(jì)算燃燒室的性能指標(biāo)，討論了對燃燒室性能有影響的諸多因素，明確了具體的影響規(guī)律。2．燃燒室流動和燃燒過程的三維數(shù)值模擬。此基礎(chǔ)上，又展開了對燃燒室尺寸和工作條件對其性能影響規(guī)律的研究。關(guān)鍵詞：隔離扇柔性轉(zhuǎn)子發(fā)動機(jī) 燃燒室性能 幾何非線性 數(shù)值模擬 微小型機(jī)械 IIIDesign of Micropower Engine’s Structure and its Analyses Abstract：The proposal of the concept of micro electromechanical system promotes the development of micropower system, whose smaller size, higher energy storage and a wider range of power output and applying stable, which makes it a wide range of application market and bright prospects for its development. While now this field is not mature. Based on this background, this article presents a micro isolatedwing flexible rotary engine, whose flexible characteristics make it a unique advantage. Based on the concept prototype and to understand its performance and structural dynamics, the main contents of this article are as below:1. According to the principle of the engine, the whole structure and subsystems were designed, and thermodynamic model of the engine ,combustion heat release model revised based on the threedimensional numerical simulation process was established in the article. On this basis, the article calculated the bustion performance and discussed the influence of the bustion performance factors and pointed out the rules of its impact on performance. The results show that the displacement of bustion chamber of the engine is , and the cated thermal efficiency under the design speed conditions is a%28nd taking into account the mechanical loss the engine maximum output power reaches and the effective efficiency is .W69 912. This article built bustion heat release model revised based on the chamber fuel gas flow process and the threedimensional numeriIVcal simulation process. On this basis, the article discussed the influence of the bustion size and working conditions on performance.3. Against the isolated wingrotor rigidflexible coupling characteristics and isolatedwing geometry nonlinear elastic deformation during its working process, in order to examine the structural dynamic strength of the isolatedwing and the engine dynamics, the nonlinear dynamics theory model of isolated wingrotor rigidflexible system with wide range rotation was established, which laid the foundation on accurately calculating the dynamic characteristic. Key Words: isolatedwing flexible rotary engine。 geometric nonlinear。 micro machineV目錄第 1 章 緒論 ...............................................1 研究背景 ........................................................1 微小型動力系統(tǒng)發(fā)展概述 ..........................................2 微型燃?xì)廨啓C(jī) .............................................2 微型三角轉(zhuǎn)子發(fā)動機(jī) .......................................3 微型擺式發(fā)動機(jī) ...........................................3 微型對置自由活塞發(fā)動機(jī) ...................................4 微型發(fā)動機(jī)的發(fā)展趨勢 .....................................4 微尺度燃燒研究現(xiàn)狀 ..............................................5 微尺度流動、燃燒面臨的問題 ...............................5 微尺度空間燃燒可行性的研究 ...............................6 簧片柔性轉(zhuǎn)子發(fā)動機(jī)的工作原理 ....................................7 研究目的及研究內(nèi)容 ..............................................9 研究目的及意義 ...........................................9 研究內(nèi)容 .................................................9第 2 章 隔離扇柔性轉(zhuǎn)子發(fā)動機(jī)工作過程數(shù)值模擬 ..............11 燃燒模型綜述 ...................................................11 發(fā)動機(jī)主要結(jié)構(gòu)設(shè)計(jì) .............................................11 整機(jī)結(jié)構(gòu)設(shè)計(jì) ............................................12 燃燒室密封設(shè)計(jì) ..........................................13 燃燒室結(jié)構(gòu)設(shè)計(jì) ..........................................13 燃燒空間容積計(jì)算 ........................................14VI 隔離扇柔性轉(zhuǎn)子發(fā)動機(jī)熱力學(xué)模型 .................................16 燃燒室工作性能數(shù)值模擬 .........................................17 工作性能評價(jià)指標(biāo)及設(shè)計(jì)轉(zhuǎn)速 ..............................17 初始條件及模型驗(yàn)證 ......................................18 理想工況性能模擬 ........................................18 燃燒室工作性能影響因素分析 .....................................20 傳熱損失因素 ............................................20 漏氣損失因素 ............................................21 點(diǎn)火時(shí)刻因素 ............................................22 燃燒持續(xù)時(shí)間因素 ........................................24 發(fā)動機(jī)機(jī)械損失模型 .............................................24 發(fā)動機(jī)機(jī)械損失 ..........................................24 機(jī)械損失模型 ............................................25 機(jī)械損失結(jié)果 ............................................25 隔離扇柔性轉(zhuǎn)子發(fā)動機(jī)輸出性能計(jì)算 ...............................26 發(fā)動機(jī)輸出性能評價(jià)指標(biāo) ..................................26 發(fā)動機(jī)速度特性 ..........................................27 發(fā)動機(jī)負(fù)荷特性 ..........................................28 本章小結(jié) .......................................................29第 3 章 隔離扇轉(zhuǎn)子非線性動力學(xué)研究 .......................31 剛?cè)狁詈戏蔷€性動力學(xué)的理論模型 ................................31 彈性隔離扇的運(yùn)動學(xué)方程 ..................................31 隔離扇總體坐標(biāo)系下的有限元位形描述 ......................32 隔離扇轉(zhuǎn)子剛?cè)狁詈蟿恿W(xué)方程 ...........................34 隔離扇靜態(tài)結(jié)構(gòu)強(qiáng)度計(jì)算 .........................................37 隔離扇材料的選取 ........................................37 隔離扇結(jié)構(gòu)設(shè)計(jì) ..........................................37 隔離扇靜態(tài)強(qiáng)度校核 ......................................38 隔離扇轉(zhuǎn)