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Performance Emission Characteristic OfudEmulsified Biofuel Application In Diesel Engineud

机译:ud的性能和排放特性乳化生物燃料在柴油机中的应用 ud

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摘要

The depletion of fossil fuel reserve and the fluctuation of oil prices in the global market have triggered global awareness and interest in developing alternative fuels. Fossil fuel has become a major environment concern due to its detrimental pollution effect. Crude palm oil (CPO) is one of the most potential biofuels that can be applied in the conventional diesel engines, since its chemical properties are comparable to that of diesel fuel. However, its higher viscosity and heavier molecules can contribute to several engine problems such as low atomization during injection, carbon deposit formation and injector clogging. An emulsification of biofuel and modifications of few engine critical components that include the incorporation of Guide Vane at the inlet manifold and the search for new piston bowl design have been identified as a promising solutions to mitigate the issues. This study presents the results of both numerical and experimental investigations showing the effects of dissimilar guide vane design (GVD) in terms of height variation of 0.25R, 0.3R and 0.35R at the intake manifold and dissimilar piston bowl designs with respect to OCB, OCC and SCC to the in-cylinder air flow characteristics improvement. The GVD designs and Piston modifications have been fabricated and tested to the Yanmar L70AE engine. The GVD designs and Piston modifications have been modelled using SOLIDWORK 2014, and ANSYS FLUENT 15 is employed and utilized to run a three dimensional (3D) cold flow internal combustion (IC) engine simulation. Both simulation and experimental results show that the intake manifold with GVD improved the performance of the airudxixudflow characteristic particularly swirl, tumble and cross tumble ratios from the intake manifold to the engine. The GVD with the height of 0.3R was found to be the optimum design with respect to the overall improvement of the air flow characteristic. The improvement of the air flow characteristics with the application of GVD and SCC piston in the engine was proven to be successfully contribute to a better air fuel mixing and fuel atomization as based on the results of engine performance characteristics improvement throughout
机译:化石燃料储备的枯竭和全球市场油价的波动引发了全球对开发替代燃料的认识和兴趣。由于其有害的污染作用,化石燃料已成为主要的环境问题。粗棕榈油(CPO)是可用于常规柴油发动机的最有潜力的生物燃料之一,因为它的化学性质与柴油相当。但是,其较高的粘度和较重的分子会导致一些发动机问题,例如喷射过程中的低雾化,积碳形成和喷射器堵塞。生物燃料的乳化和少量发动机关键部件的改进(包括在进气歧管中加入导流叶片以及寻找新的活塞碗设计)已被认为是缓解问题的有前途的解决方案。这项研究提供了数值研究和实验研究的结果,显示了进气歧管上的0.25R,0.3R和0.35R的高低不等的导向叶片设计(GVD)的影响以及相对于OCB的不同的活塞碗设计, OCC和SCC使缸内空气流动特性得到改善。 GVD设计和活塞改装已针对洋马L70AE发动机进行了制造和测试。 GVD设计和活塞修改已使用SOLIDWORK 2014进行了建模,ANSYS FLUENT 15被采用并用于运行三维(3D)冷流内燃(IC)发动机仿真。仿真和实验结果均表明,具有GVD的进气歧管改善了空气 udxix udflow特性的性能,特别是从进气歧管到发动机的涡流,翻转和交叉翻转比。发现相对于空气流动特性的整体改善,高度为0.3R的GVD是最佳设计。通过在整个发动机性能特性改善的结果的基础上,通过在发动机中使用GVD和SCC活塞来改善气流特性已被证明成功地有助于更好的空气燃料混合和燃料雾化。

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    Hamid Mohd Fadzli;

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  • 年度 2017
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