摘 要
從1860年起，萊諾依爾發(fā)明了大氣內(nèi)燃機(jī)到如今，內(nèi)燃機(jī)經(jīng)歷了140多年的發(fā)展。內(nèi)燃機(jī)自發(fā)明以來，一直把提高動(dòng)力性，改善經(jīng)濟(jì)性以及提高可靠性 和耐久性作為主要研究目標(biāo)。但是隨著內(nèi)燃機(jī)的保有量及生產(chǎn)量的成倍增加，對(duì)環(huán)境的污染越來越嚴(yán)重，而且由于石油危機(jī)導(dǎo)致原油價(jià)格成倍增長(zhǎng)，這些嚴(yán)重的問題給內(nèi)燃機(jī)的研究提出了新的要求，使內(nèi)燃機(jī)的研究目標(biāo)發(fā)生了根本變化。出了提高動(dòng)力性，改善經(jīng)濟(jì)性以及提高可靠性和耐久性外，影響內(nèi)燃機(jī)設(shè)計(jì)和運(yùn)行的主要因素是凈化廢氣、降低噪音降低燃油消耗率和采用多種燃料。
本文以東風(fēng)4型內(nèi)燃機(jī)為例，設(shè)計(jì)確定散熱器的結(jié)構(gòu)，傳熱過程的傳熱系數(shù)、面積、散熱單節(jié)數(shù)、冷卻風(fēng)扇的功率，同時(shí)對(duì)扁管和圓管進(jìn)行了計(jì)算與比較。
關(guān)鍵詞：內(nèi)燃機(jī) 扁管 圓管











Abstract

Since 1860, leno who invented atmospheric engine up to now, experienced 140years of development of internal combustion engine. Internal combustion engine since its invention, has been to increase power, improve the economy and improving the reliability and durability as the main research object. But with the internal combustion engine retains the quantity and production quantity increases exponentially, the environment pollution is more and more serious, and because of the oil crisis caused the oil price twice grows, these serious problems to the research of internal combustion engine has made new demands, the research of internal combustion engine target produced fundamental change. The increased power, improve the economy and improving the reliability and durability of external, internal combustion engine design and operation effect is the main factor for purifying exhaust gas, noise reduction to reduce the fuel consumption rate and using various kinds of fuel.
Taking Dongfeng 4 diesel as an example, the design to determine the structure of the radiator, the heat transfer coefficient, heat transfer area, cooling section number, cooling fan power, at the same time on the flat tube and pipe were calculated and compared.



Key Words: Internal combustion Flat Tube pipe







目 錄


摘 要 …………………………………………………….
Abstract …………………………………………………
一 緒論…………………………………………………….
1.1 課題背景和意義 ……………………………………
1.2國內(nèi)外研究發(fā)展?fàn)顩r……………………………………
1.3 內(nèi)燃機(jī)冷卻系的作用介紹及分類 ………………
1.4本課程研究的主要內(nèi)容和任務(wù)…………………….
二 內(nèi)燃機(jī)冷卻裝置計(jì)算………………………………..
2.1概述………………………………………………….
2.2熱交換器的選取…………………………….
2.3 冷卻水系統(tǒng)………………………………………….
2.4風(fēng)扇及風(fēng)機(jī)的選取與計(jì)算……………………………
2.5本章小結(jié)…………………………………………….
三 結(jié)論與展望……………………………………………
3.1 結(jié)論…………………………………………………..
3.2 展望 …………………………………………………
參考文獻(xiàn)………………………………………………….
致 謝 ……………………………………………………..
附 圖