目前人類所使用的能源大多來自火力發電，核能發電等高汙染性的集中式發電系統，但在環保意識逐漸抬頭下，分散式發電應運而生。它的主要訴求是提高電力能源自主性、發電效率及降低溫室氣體效應。為減少開發的成本，與加快實驗的進程，吾人藉過去學長們研發渦輪引擎的經驗，結合已商品化的離心式渦輪增壓器(Turbocharger)，與自行設計的軸流動力渦輪段，開發高效率、低污染、模組化、低成本之微渦輪發電(Turbo Generator)。本研究最主要的目的是建立一套設計方法，可以把市售的離心式渦輪增壓器改裝成渦輪軸(Turboshaft)。實驗流程是確立任務需求，並且透過Gasturb分析微型渦輪的熱循環圖，然後透過一維設計工具設計不同參數之軸流式壓縮器葉輪，在模擬分析上，使用了有限體積法、六面體網格、CFX流場分析及後處理，決定出一符合工作條件的動力渦輪葉片段。最後在實驗的結果中得到的動力渦輪規格，其等熵效率(Total-to-Total Isentropic Efficiency)為 88.6%，做功量61.03kW、質流量0.529kg/s，並透過調整不同的吸壓力面分布使氣流通過時的分離現象，及熵值變化都可以減少。

At present, most of the energy used by human beings comes from thermal power plant, nuclear power plant, and other highly polluting centralized power generation systems. However, in the light of environmental awareness, decentralized power plant has appealed to improve energy independence, efficiency and reduces greenhouse gas effects. To reduce the cost of development and accelerate the process of experiment. Our senior’s developed turbine engines which combined with commercial centrifugal turbocharger and the design of axial power turbine section for high efficiency, low pollution, modularization and low cost of micro turbine generator (turbo generator). The main purpose of this study is to establish a system and method to turn the commercially available centrifugal turbocharger into a turboshaft engine. The main process is to establish task requirements through the analysis of Gasturb micro-turbine thermal cycle diagram. With one dimensional design tool, different parameter of axial flow compressor impeller on the simulation analysis, using the finite volume method provided hexahedral grids, CFX flow field analysis and post-processing finally decided to place a conform to the working conditions of power turbine blade section. The power turbine specifications obtained in the experimental results have a total-to-total isentropic efficiency of 88.6%, a work volume of 61.03 kW, a mass flow of 0.529 kg/s, By adjusting different suction pressure surface distributions can reduce the separation phenomenon and the change in the entropy value when the airflow is passed.

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