进气口位置及蜗壳结构对微型发电涡轮输出扭矩的影响分析

Influence of Inlet Position and Volute Structure on Output Torque of Micro Turbine Generator

增加涡轮输出扭矩是提高微型排气回收高效涡轮节能发电系统转换效率的关键。为分析进气口位置以及蜗壳结构对涡轮输出扭矩的影响,建立涡轮受力及输出扭矩的数学模型;揭示不同进气口位置、不同蜗壳结构对涡轮输出扭矩的影响规律,进而设计一种使涡轮产生较大扭矩且对气缸排气特性影响较小的蜗壳,为微型涡轮发电系统的有效集成奠定了基础。

The mechanical energy of the turbine output of the micro turbine generator has an influence on the energy utilization rate of the pressure gas at the exhaust side of the cylinder. Therefore, increasing the output torque of turbine is the key method to improve the efficiency of turbo generator. In order to analyze the influence of inlet position and volute structure on turbine output torque, a theoretical model of turbine force and torque was established. The validity of the theoretical model was verified by experiment and simulation analysis. The influence of different inlet position and volute structure on turbine output torque was deeply studied. Then a turbine producing large torque and small influence on the exhaust characteristics of the cylinder was designed. It lays foundation for the effective integration of micro turbine power generation system.