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류영(Y. Ryu),위신환(S. W. Wei),송영식(Y. S. Song),노석홍(S. H. Noh),최경호(G. H. Choi),이종태(J. T. Lee) 한국자동차공학회 1996 한국자동차공학회 학술강연초록집 Vol.1996 No.10
The instantaneous wan temperature and heat flux of the Piston crown, ring groove and land are measured and analyzed It was found that (i) the instantaneous wall temperature of the valve pocket, in the piston crown, is higher than that of the center of the crown and the edge of the crown is lowest; (ii) the instantaneous temperature of the top-ring groove and land are changed simi1ar to that of the piston crown, which are influenced by the behaivar of the piston ring; (iii) the distributions of the heat flux are not coincided with the wall surface temperature, which are depended on the f1ame distance, combustion condition, behavior of the piston ring and the state of cooling, etc
민영대(Y.D.Min),위신환(S.W.Wei),이종태(J.T.Lee) 한국자동차공학회 1997 한국자동차공학회 춘 추계 학술대회 논문집 Vol.1997 No.11_1
Transient heat transfer coefficients of gas at the cylinder head. piston and cylinder liner were determined by instantaneous surface temperatures and unsteady heat fluxes measured with instantaneous temperature probe and gas pressrue in cylinder. The main results are as follows; (i) Transient heat transfer coefficients have great difference according to measurement points. (ii) the highest heat transfer coefficient is at vicinity of piston crown (iii) the heat transfer coefficient of piston crown is shown about 3.4 times as high as that of cylinder head.<br/>