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本文建立了计算直喷式柴油机气缸内热力过程、气缸周壁传热和气缸盖排气道传热的数学模型,并编制了计算机程序。采用解析法处理气缸周壁传热,特别是应用二维解析法建立活塞顶传热,将气缸周璧传热计算与柴油机气缸内热力过程计算相结合,互为边界条件,因此能模拟计算绝热机工作过程。在几种气缸周壁绝热层布置形式下,以6110A柴油机为例进行了非增压、增压和增压带动力涡轮在标定工况下的模拟计算,并分析了绝热对发动机性能,燃烧过程以及热平衡的影响。为研制绝热发动机提供了预测数据。
In this paper, a mathematical model for calculating the thermal process in the cylinder of the direct injection diesel engine, the heat transfer in the peripheral wall of the cylinder and the heat transfer in the exhaust passage of the cylinder head has been established and the computer program has been compiled. Analytical method is applied to deal with the heat transfer around the cylinder wall. In particular, two-dimensional analytical method is used to establish the piston top heat transfer. Combining the heat transfer calculation of the cylinder with the calculation of the thermal process in the cylinder of the diesel engine, each boundary condition is used, work process. In the case of several cylinder wall thermal insulation layer layouts, the 6110A diesel engine was taken as an example to simulate the turbocharged, supercharged and turbocharged turbo - charged turbines under the calibration conditions. The effects of adiabaticity on engine performance, combustion process and Effect of heat balance. For the development of adiabatic engine provides predictive data.