本文選題：微型擺式內(nèi)燃機(jī) + 能效分析�。� 參考：《南京航空航天大學(xué)》2016年碩士論文

【摘要】：隨著電子與機(jī)械設(shè)備的微型化與便攜化發(fā)展,傳統(tǒng)的化學(xué)電池的能量密度已不能滿足這種高能量密度的需求。當(dāng)前以染料燃燒為基礎(chǔ)的微型能源動力系統(tǒng)為這一趨勢提供了新的解決方案。但是在目前的微型內(nèi)燃機(jī)系統(tǒng)研究中,燃機(jī)的低效運(yùn)行是困擾研究者的一大難題。為提高微型擺式內(nèi)燃機(jī)的輸出特性,需要針對系統(tǒng)實(shí)際運(yùn)行能效規(guī)律的分析。對微型擺式內(nèi)燃機(jī)的工作過程進(jìn)行數(shù)值模擬計算可以十分方便高效的得到微型內(nèi)燃機(jī)的運(yùn)行規(guī)律。本文根據(jù)內(nèi)燃機(jī)的一般原理與規(guī)律研究微型擺式內(nèi)燃機(jī)的工作過程。主要工作包含:1.建立包含不可逆損失條件的四沖程微型擺式內(nèi)燃機(jī)的零維數(shù)學(xué)計算模型;2.利用MATLAB軟件對微型擺式內(nèi)燃機(jī)的工作過程進(jìn)行數(shù)值建模和數(shù)值計算,得到內(nèi)燃機(jī)穩(wěn)定運(yùn)行的循環(huán)參數(shù),通過數(shù)值模擬數(shù)據(jù)分析微型擺式內(nèi)燃機(jī)的能效表現(xiàn)情況,并探討提高能效的影響因素;3.比較了系統(tǒng)負(fù)載、燃燒時間、泄漏、摩擦、傳熱等不可逆條件對于微型擺式內(nèi)燃機(jī)系統(tǒng)的影響情況和對功效的影響趨勢;4.探討微型擺式內(nèi)燃機(jī)能效提高的途徑,指出各不可逆條件中制約微型擺式內(nèi)燃機(jī)能效的主要因素。本文通過建立微型擺式內(nèi)燃機(jī)的數(shù)學(xué)計算模型,模擬計算微型擺式內(nèi)燃機(jī)運(yùn)行過程參數(shù),研究影響微型擺式內(nèi)燃機(jī)的能效的各項(xiàng)不可逆條件,探究微型擺式內(nèi)燃機(jī)不可逆損失顯著增加的機(jī)理,并在此基礎(chǔ)之上探討提高微型擺式內(nèi)燃機(jī)的途徑。研究發(fā)現(xiàn),在微型擺式內(nèi)燃機(jī)系統(tǒng)中,各種不可逆條件之間存在互相作用。一種損失條件的增強(qiáng)同時會導(dǎo)致其他損失條件的變化。就目前各種不可逆條件的控制精度而言,泄漏條件在微型內(nèi)燃機(jī)中的影響作用十分明顯。同時,計算結(jié)果說明控制擺式內(nèi)燃機(jī)的壓縮比可以有效降低泄漏條件的敏感性。
[Abstract]:With the development of miniaturization and portability of electronic and mechanical equipment, the energy density of traditional chemical battery can not meet the demand of high energy density.The current micro energy power system based on dye combustion provides a new solution to this trend.However, in the current research of micro internal combustion engine system, the low-efficiency operation of gas turbine is a difficult problem for researchers.In order to improve the output characteristics of micro pendulum internal combustion engine, it is necessary to analyze the law of energy efficiency in actual operation of the system.Numerical simulation of the working process of micro pendulum internal combustion engine can obtain the running law of micro internal combustion engine conveniently and efficiently.According to the general principle and law of internal combustion engine, the working process of micro pendulum internal combustion engine is studied in this paper.The main work consists of 1: 1.The zero dimensional mathematical model of four stroke micro pendulum internal combustion engine with irreversible loss condition is established.The working process of micro pendulum internal combustion engine is modeled and numerically calculated by MATLAB software, and the cycle parameters of engine running stably are obtained. The performance of energy efficiency of micro pendulum internal combustion engine is analyzed by numerical simulation data.The influencing factors of improving energy efficiency are also discussed.The effects of system load, combustion time, leakage, friction, heat transfer and other irreversible conditions on micro pendulum internal combustion engine system are compared.This paper discusses the ways to improve the energy efficiency of micro pendulum internal combustion engines, and points out the main factors restricting the efficiency of micro pendulum internal combustion engines under various irreversible conditions.In this paper, the mathematical model of micro pendulum internal combustion engine is established, and the operating process parameters of micro pendulum internal combustion engine are simulated and calculated. The irreversibility conditions affecting the energy efficiency of micro pendulum internal combustion engine are studied.The mechanism of increasing irreversible loss of micro pendulum internal combustion engine is discussed, and the way to increase the loss of micro pendulum internal combustion engine is discussed.It is found that there is interaction between various irreversible conditions in the micro pendulum internal combustion engine system.The enhancement of one loss condition can also lead to changes in other loss conditions.As far as the control accuracy of various irreversible conditions is concerned, the effect of leakage conditions on micro internal combustion engines is very obvious.At the same time, the calculation results show that the compression ratio of pendulum internal combustion engine can effectively reduce the sensitivity of leakage conditions.
【學(xué)位授予單位】：南京航空航天大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TK401

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