| 高空活塞发动机2级涡轮增压系统匹配分析 |
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| 引用本文： | 徐斌,尧辉,薄东,于鲸跃.高空活塞发动机2级涡轮增压系统匹配分析[J].航空发动机,2010,36(1):10-13. |
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| 作者姓名： | 徐斌 尧辉 薄东 于鲸跃 |
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| 作者单位： | 1. 大连理工大学,大连,116024
2. 沈阳发动机设计研究所,沈阳,110015 |
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| 摘 要： | 为满足无人机高性能动力要求,改进了某型涡轮增压活塞式发动机2级涡轮增压系统。根据发动机工作过程模拟计算原理,利用CFD软件建立了该型发动机1级涡轮增压模型,并验证了该模型的准确性;确定了2级涡轮增压参数及高、低压气机的压比分配,讨论了2级增压器和中冷器的布置方案,分析了2级涡轮增压的高空特性,为2级涡轮增压系统选配了合适的增压器。
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| 关 键 词： | 燃气轮机 振动 临界转速 支点刚度 裕度 假定模态法 数值拟合法 |
Matching Analysis of Two Stage Turbocharging System of High Altitude Piston Engine |
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| Authors: | XU Bin YAO Hni BO Dong YU Jing-yue |
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| Institution: | 1. Dalian University of Technology, Dalian 116024, China; 2. Shenyang Aeroengine Research Institute, Shenyangl 10015, China) |
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| Abstract: | The computational analysis of variety concepts for improving critical speed design margin of a gas turbine was performed using assumed mode method and numerical fitting method. Combining measurement results, the reasonable improved design concept was presented and adopted which mov＇ed forward the flange of front support and increased the axial length of bearing casing and decreased the casing thickness from 16mm to lOmm. The second order critical speed margin to rated speed was increased from 5% to 10% and then vibration characteristics were improved. |
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| Keywords: | gas turbine vibration cdtical speed support rigidity margin assumed mode method numerical fitting |
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