活塞航空发动机复合增压技术仿真分析  

Simulation analysis of composite supercharging technology of aircraft piston engines

作　　者：潘钟键[1] 何清华[1,2] 张祥剑[1] 

机构地区：[1]中南大学机电工程学院,湖南长沙410083 [2]山河智能装备股份有限公司技术中心,湖南长沙410100

出　　处：《哈尔滨工程大学学报》2014年第12期1543-1547,共5页Journal of Harbin Engineering University

基　　金：国家863计划资助项目(2009AA045103)

摘　　要：为研究复合增压条件下活塞航空发动机高空性能,建立某型活塞航空发动机复合增压GT-POWER仿真模型并验证模型的准确性,对不同增压条件下的发动机高空特性进行分析。仅在一级涡轮增压条件下,发动机在5 000 m高空时,和地面工况相比,压力峰值降低26%且后燃现象严重,同时缸内温度上升,发动机热负荷显著增加,发动机功率下降。在复合增压条件下,高空时缸内压力得到恢复,缸内温度趋于地面工况,发动机功率得到恢复。该发动机搭载某轻型飞机进行高空试飞后,在7 600 m高空功率仍可保持80%的功率,验证复合增压技术满足高空飞行的需求。In order to investigate the high altitude performance of aircraft piston engines under composite superchar-ging conditions, the GT-POWER model of a composite supercharged system used on a certain aircraft piston engine was established to analyze its altitude characteristics under different supercharging conditions and its accuracy was validated.Based on the simulation results, it was concluded that when the engine was merely under level-one turbo-charging condition, compared with the working condition on the ground, its maximum pressure in cylinder declined by 26 percent and the after-burning phenomenon became severe when it was operated at 5 000 meters above ground. In addition, the temperature in cylinder rose, resulting in apparent increase of thermal load, which ultimately lea-ded to power decrease of the engine.However, if the engine worked under composite supercharging condition, the pressure and power of the engine would recover in the high altitude, and the temperature in the cylinder approached to the level of ground working condition.When the engine was applied to a certain light aircraft, it could still main-tain 80 percent of power even at the height of 7 600 meters, which verified that the composite supercharged system can satisfy the demand of high-altitude flight perfectly.

关 键 词：活塞航空发动机 涡轮增压 后燃 复合增压 压力峰值 功率恢复 

分 类 号：TK421[动力工程及工程热物理—动力机械及工程]