本文選題：柴油機 + 活塞　； 參考：《華中科技大學(xué)學(xué)報(自然科學(xué)版)》2016年05期

【摘要】：利用存儲式活塞穩(wěn)態(tài)溫度測試系統(tǒng),基于負荷特性曲線,對連續(xù)工況下活塞穩(wěn)態(tài)溫度進行測量.綜合分析測試數(shù)據(jù),分別對9個和25個工況點活塞溫度用二次多項式進行擬合,計算了中間工況下活塞溫度.結(jié)果表明:活塞溫度分別隨轉(zhuǎn)速與扭矩的增加而呈現(xiàn)明顯增加趨勢;二次多項式擬合方法能有效獲得中間工況活塞溫度,滿足大多數(shù)工況下的工程計算精度要求,可用于預(yù)測未知工況下的活塞穩(wěn)態(tài)溫度.利用該方法可有效獲得部分負荷工況下活塞的穩(wěn)態(tài)溫度,也可為缸內(nèi)三維燃燒和排放的活塞側(cè)邊界條件的獲取提供支持.
[Abstract]:Based on the load characteristic curve, the steady state temperature of piston under continuous working condition is measured by using the storage piston steady state temperature measurement system. The piston temperature of 9 and 25 working conditions was fitted with quadratic polynomial to calculate the piston temperature in intermediate working condition. The results show that the piston temperature increases obviously with the increase of rotational speed and torque, and the quadratic polynomial fitting method can effectively obtain the intermediate piston temperature and meet the requirements of engineering calculation accuracy under most working conditions. It can be used to predict the steady state temperature of piston under unknown operating conditions. By using this method, the steady state temperature of the piston under partial load condition can be obtained effectively, and it can also provide support for obtaining the piston side boundary conditions of combustion and discharge in cylinder.
【作者單位】： 華中科技大學(xué)能源與動力工程學(xué)院;東風(fēng)商用車技術(shù)中心;
【基金】：國家自然科學(xué)基金資助項目(50976039)
【分類號】：TK427

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