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  • 學位論文

輕型柴油引擎進氣道渦流度最佳化之研究

STUDY ON THE OPTIMIZATION OF INTAKE PORT SWIRL RATIO FOR LIGHT-DUTY DIESEL ENGINE

指導教授 : 賴光哲
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摘要


內燃機的發展上已經有百年的歷史,在早期所使用的為機械式作動 的裝置,至今已運用了高科技裝置配合,然而設計概念和製造技術已接 近完備,為了精益求精讓柴油引擎的發展能夠達到更有效率,故在引擎 的材料上及加工技術上求得突破,使柴油引擎能降低重量並依然堅固、 且能減低製造的成本,甚至降低功率上的損失,也因如此,在未來引擎 的發展上,仍然具備著相當大的演進空間,並朝向省油、零污染的高效 率柴油引擎開發邁進。 本文主要研究如何設計引擎進氣道並能產生良好的渦流流場,研究中將針對三種不同的進氣道設計以CFD流體模擬分析方式對進氣道做流場分析,然後於流量機台上數值量測、最後再針對缺陷處做探討並修改 ,使進氣道能達到最佳化的效能以提升渦流度。

關鍵字

進氣道 渦流 柴油引擎

並列摘要


The development of internal combustion engines since mechanical actuation to high-tech devices,It have been a hundred years of experience.But the design concepts and manufacturing technologies have received Nearly complete,In order to keep improving so that help the development of diesel engines to achieve more efficient.On the materials and processing technology should be breakthroughs to enable diesel engines keep strong where reduce weight,Otherwise,It can reduce manufacturing costs and even lower-power on the losses,Also because of this,The engine development of fuel-efficient and zero emission in the future ,Still has considerable evolution of space. This paper studies how to design the engine inlet and also make good flow field of swirl.Study will focus on fluid simulation for three different inlet design by CFD analysis and measure on the flow bench with flow box,Then to do explore for the defect. Help inlet to achieve optimal performance and enhance the vortex.

並列關鍵字

swirl diesel engine intake port

參考文獻


[13] 舒小恩,”進氣道角度對內燃機引擎汽缸內流場影響之研究”,私
[14] 廖俊霖,”內燃機引擎進氣閥道內流場之研究”,私立中原大學機
流動係數與流阻之探討”,第二十屆機械工程研討會論文集, 2003
and Computational Analysis of the Flow Field in a Four-Valve
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