边界条件对柴油机活塞内温度分布计算的影响_聂宇宏.pdfVIP

23 1 () V o l 2 3 N o 1 2009 2 Journa l of J iangsu U niversity of Science and T echno logy( N atura l Sc ience Edition) F eb 2009 聂宇宏, 宋有生 ( , 212003) : , , G4135 , , , , , : ; ; ; : TK4 212 : A : 167 3- 4 807 ( 2009) 01- 0047 - 04 Influence of boundary conditions on temperature distribution in the dieselpiston N ie Y uhong, Song Y ou sheng ( School of N aval A rch itecture and O cean Engin eering, J iang su U n iv ers ity of S cience and T echn ology, Zhen j iang Jiang su 2 12003, Ch ina) Abstract: In order to determ ine the tem p erature d istribut ion in the p iston, the boundary cond it ion of the p iston m u st be correct T he tem perature d istribut ion in a G4135diesel p iston w as ca lculated under rated situ ation when he heat flux smi u lated from the com bustion, flu id flow and heat tran sfer compu tation in the diesel in- cy linder is used as the boundary condition T he tem perature d istribut ions in the sam e p iston w ere calcu lated under two boundary cond ition s that w ere the tradit iona l em p irical form ula and the num erica l smi ulat ion R esults w ere com- pared bewt een the tw o boundary cond it ions R esults show that the largest tem perature difference in the p iston is under place where the p iston tem p erature is the h ighest So the num erical values can be u sed as heat boundary condition s of p iston top to smi ulate m ore accurate tem perature d istribution Key words: p iston; tem perature d istribution; boundary cond it ion; fin ite elem ent ana lysis , , , , ,