【正文】 信偵察小型衛(wèi)星、微小型飛行器、微小型執(zhí)行器等等。 chamber property。通過對燃燒過程的數(shù)值模擬計算分析了燃燒室氣流流動和燃燒性能。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)動機工作原理對整機結(jié)構(gòu)和各子系統(tǒng)進行設(shè)計，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。基于此，本文提出一種微小型隔離扇柔性轉(zhuǎn)子發(fā)動機，其中隔離扇轉(zhuǎn)子的柔性特點使其具有諸多獨特優(yōu)勢。2．燃燒室流動和燃燒過程的三維數(shù)值模擬。關(guān)鍵詞：隔離扇柔性轉(zhuǎn)子發(fā)動機 燃燒室性能 幾何非線性 數(shù)值模擬 微小型機械 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。 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 .............................................2 微型三角轉(zhuǎn)子發(fā)動機 .......................................3 微型擺式發(fā)動機 ...........................................3 微型對置自由活塞發(fā)動機 ...................................4 微型發(fā)動機的發(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)動機工作過程數(shù)值模擬 ..............11 燃燒模型綜述 ...................................................11 發(fā)動機主要結(jié)構(gòu)設(shè)計 .............................................11 整機結(jié)構(gòu)設(shè)計 ............................................12 燃燒室密封設(shè)計 ..........................................13 燃燒室結(jié)構(gòu)設(shè)計 ..........................................13 燃燒空間容積計算 ........................................14VI 隔離扇柔性轉(zhuǎn)子發(fā)動機熱力學(xué)模型 .................................16 燃燒室工作性能數(shù)值模擬 .........................................17 工作性能評價指標(biāo)及設(shè)計轉(zhuǎn)速 ..............................17 初始條件及模型驗證 ......................................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 點火時刻因素 ............................................22 燃燒持續(xù)時間因素 ........................................24 發(fā)動機機械損失模型 .............................................24 發(fā)動機機械損失 ..........................................24 機械損失模型 ............................................25 機械損失結(jié)果 ............................................25 隔離扇柔性轉(zhuǎn)子發(fā)動機輸出性能計算 ...............................26 發(fā)動機輸出性能評價指標(biāo) ..................................26 發(fā)動機速度特性 ..........................................27 發(fā)動機負(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)強度計算 .........................................37 隔離扇材料的選取 ........................................37 隔離扇結(jié)構(gòu)設(shè)計 ..........................................37 隔離扇靜態(tài)強度校核 ......................................38 隔離扇轉(zhuǎn)子多柔體動力學(xué)仿真模型 ................................40VII 多柔體動力學(xué)仿真模型的建立 ..............................40 約束與載荷施加 ..........................................40 隔離扇轉(zhuǎn)子動力學(xué)特性分析 ......................................41 隔離扇氣缸接觸力計算 ...................................41 隔離扇運動學(xué)特性 ........................................42 隔離扇轉(zhuǎn)子動應(yīng)力計算 ...................................43 輸出軸扭矩特性 ..........................................46 隔離扇動力學(xué)特性參數(shù)化分析 .....................................47 隔離扇長度因素 ..........................................47 隔離扇厚度因素 ..........................................48 本章小結(jié) .......................................................49結(jié)論 ........