The area over 2000 m above sea level in China accounts for about one third of the land area,and the average altitude of Qinghai-Tibet Plateau is over 4000 m.As an important power source,diesel engines play an important role in engineering construction,pipeline transportation and vehicle transportation.A diesel engine simulation model was established by using GT POWER software,and the calculation accuracy of the simulation model was verified by the diesel engine bench experiment under the plain environment with different speed.The diesel engine simulation model was used to study the variation law of diesel engine power under different altitude conditions.The engine output power decreased by 8～12 kW every 1000 m altitude increase.With the increase of altitude,t the decline of engine output power showed a changing trend of first increasing and then decreasing,and the decrease was the largest at 3000 m altitude.By means of quantitative analysis,the performance recovery characteristics of the engine under different altitude conditions were simulated by adjusting fuel injection,turbocharging,oxygenated fuel,etc.,and the improvement effects of different methods under high altitude conditions were studied.
关键词
柴油机/高原/性能/模拟/燃料/传热
Key words
Diesel engine/Plateau/Performance/Simulation/Fuel/Heat transfer
维普
万方数据