【摘要】：隨著柴油機(jī)行業(yè)的飛速發(fā)展,傳統(tǒng)的研發(fā)流程由于缺少復(fù)雜而科學(xué)的理論計(jì)算依據(jù)導(dǎo)致廢品率高、試驗(yàn)成本高、研發(fā)周期長的弊端,已經(jīng)無法滿足現(xiàn)代柴油機(jī)研制及市場更新?lián)Q代的需求,利用現(xiàn)代CAE仿真技術(shù)在發(fā)動機(jī)圖紙階段對發(fā)動機(jī)性能進(jìn)行預(yù)測,通過優(yōu)選方案減少發(fā)動機(jī)在試驗(yàn)階段的方案數(shù)量顯得尤為重要。本文以玉柴新開發(fā)的YC4S柴油機(jī)作為研究對象,在發(fā)動機(jī)設(shè)計(jì)階段對發(fā)動機(jī)的動力性、經(jīng)濟(jì)性進(jìn)行了預(yù)測。本文主要內(nèi)容包括:(1)對國內(nèi)外柴油機(jī)研發(fā)流程的現(xiàn)狀和發(fā)展趨勢進(jìn)行了綜合概述,同時(shí)還還闡述了YC4S柴油機(jī)的研發(fā)背景。這些都為YC4S柴油機(jī)在研發(fā)過程中采用CAE技術(shù)提供了必要依據(jù)。(2)柴油機(jī)的動力性、經(jīng)濟(jì)性以及排放性是發(fā)動機(jī)最重要的特性,在圖紙?jiān)O(shè)計(jì)階段對它們的預(yù)測顯得尤為重要。本文采用了Vibe燃燒放熱模型和“Woschni1978”放熱模型對YC4S柴油機(jī)的動力性、經(jīng)濟(jì)性和排放性能進(jìn)行預(yù)測。通過研究表明:發(fā)動機(jī)采用18:1的壓縮比,將原增壓器基礎(chǔ)上將渦輪增大70%,同時(shí)將排氣門開啟角增大10deg CRA、氣門重疊角減小10deg CRA,能獲得較好的綜合性能,標(biāo)定轉(zhuǎn)速時(shí)平均要小壓力提高了0.37bar,功率提高了4.3k W,最低比油耗降低了3g/(k W/h)。(3)選取不同的增壓器做臺架試驗(yàn),檢驗(yàn)計(jì)算機(jī)仿真分析的準(zhǔn)確性,從而確認(rèn)計(jì)算機(jī)仿真分析對柴油機(jī)研發(fā)過程具有準(zhǔn)確的指導(dǎo)意義。試驗(yàn)表明,001增壓器壓端:C246(56)55Trim,0.56A/R,渦端:T232(50)74Trim,0.40A/R參數(shù)比較合理,可以得到更好的動力性和經(jīng)濟(jì)性。
[Abstract]:With the rapid development of diesel engine industry, the traditional research and development process, due to the lack of complex and scientific theoretical basis of calculation, led to high scrap rate, high test cost, long research and development cycle. It has been unable to meet the needs of modern diesel engine development and market renewal. The engine performance is predicted by modern CAE simulation technology in engine drawing stage. It is very important to reduce the number of engine schemes in the test stage by optimal selection scheme. In this paper, the new YC4S diesel engine developed by Yuchai is taken as the research object, and the engine power and economy are predicted in the engine design stage. The main contents of this paper are as follows: (1) the present situation and development trend of diesel engine R & D process at home and abroad are summarized, and the background of YC4S diesel engine R & D is also expounded. All these provide the necessary basis for the YC4S diesel engine to adopt CAE technology in the research and development process. (2) the engine's power performance, economy and emission are the most important characteristics of the engine, so it is very important to predict them in the drawing design stage. In this paper, Vibe combustion heat release model and "Woschni1978" heat release model are used to predict the power performance, economy and emission performance of YC4S diesel engine. The research shows that the engine can increase the turbine by 70% on the basis of the original turbocharger and increase the opening angle of the exhaust valve by increasing the 10deg CRA, valve overlap angle and reducing the 10deg CRA, by using the compression ratio of 18:1, and the better comprehensive performance can be obtained by increasing the opening angle of the exhaust valve and reducing the overlap angle of the 10deg CRA, valve. At the calibrated speed, the average pressure is increased by 0.37 bar. the power is increased by 4.3kW, and the lowest specific fuel consumption is reduced by 3g/ (k W / h). (3). The accuracy of computer simulation analysis is verified by selecting different turbochargers. It is confirmed that computer simulation analysis has an accurate guiding significance for diesel engine R & D process. The test results show that the pressure end of 001 turbocharger is C246 (56) 55 Trimton 0.56A / R, and the vortex end is T232 (50) 74Trimn 0.40A / R, the parameters are reasonable, and better power performance and economy can be obtained.
【學(xué)位授予單位】：湖南大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2016
【分類號】：TK421

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1 原新濤;YC4S柴油機(jī)熱力學(xué)仿真分析與試驗(yàn)[D];湖南大學(xué);2016年

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本文編號：2415563