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不论瑞克(Brauschweig)工业大学内燃机研究所,在一台外源增压的MTU高速柴油机上,对热传导作了系统的研究工作。本文介绍确定燃气和气缸壁之间的热传导系数,估算热平衡,实测温度场和实测瞬时变化的表面温度的方法。由此可以证明:作者所推荐的在工作过程计算中所使用的局部平均热传导系数的计算方程式,不仅对在工作循环中由燃气传给气缸壁上的热量的计算,而且对活塞、气缸盖和气缸套上的热流的分布、热流密度的瞬时变化过程的计算都是正确的。本文报道的仅是该项研究结果的第一部分。
Regardless of the internal combustion engine institute at Brauschweig Polytechnic University, a systematic study of heat transfer was carried out on an externally pressurized MTU high-speed diesel engine. This article describes ways to determine the thermal conductivity between the gas and the cylinder walls, to estimate the thermal balance, to the measured temperature field, and to the instantaneous measured surface temperature. From this it can be shown that the calculation formula for the local average heat transfer coefficient recommended by the authors for use in the calculation of the working process not only calculates the amount of heat transferred from the gas to the cylinder wall in the working cycle but also the piston, The distribution of heat flow on the cylinder liner and the calculation of the instantaneous change of heat flux density are all correct. This article reports only the first part of the study.