Optimization of bio-butanol fuel blend composition based on spray and combustion performance

将制定一种开发新型生物燃料的变革性方法，这将与目前侧重于从农业来源(如乙醇)生产纯燃料的技术做法背道而驰。将利用丁醇的生产和利用来建立这一新模式。特别是，已经证明，在生物丁醇的生产过程中，会产生丁醇、乙醇和丙酮的混合物，通常称为丁烯。生物丁醇具有将可再生资源生产与几乎汽油水平的能量密度相结合的潜力。这些混合物显然可以自己用作燃料，而不需要求助于纯生物丁醇。事实上，基本的生物过程是可以控制的，以便产生对于发动机室内的能量转换过程来说是最佳的丁醇/丙酮/乙醇的比例。这项研究的主要目的是介绍一种方法，通过了解与其雾化和燃烧有关的燃料混合物的性质来控制生物燃料的生产过程。在这方面，将利用一种新的基于所考虑燃料的高丙酮含量的新的行星液滴大小调整技术，根据其组成来表征贝勒烯喷雾剂。此外，还将开发基于生物丁醇混合物导电性增加的新型雾化技术，这将为雾化和燃烧的静电操纵铺平道路。此外，还将在精确控制的燃烧室中测量各种燃料成分的点火延迟和湍流火焰传播。该方法将是试验性的，使用先进的、主要基于激光的诊断和计算，重点是对燃料性质和喷雾进行建模，并提供广泛的高质量数据库，以指导上游？燃料生产。研究将建立一种替代目前生物燃料生产的主导思想，即生产定义明确的化学物质(生物乙醇、甲酯)，这些化学物质需要在针对截然不同的燃料设计的发动机中运行。相反，将开发一种方法，将生物过程的中间产物用作燃料，优化其组成以实现雾化和燃烧性能，然后引导生物过程生产优化的中间产物，而不需要求助于纯化学品。通过这种方式，将实现清洁和高效的可再生燃料燃烧，同时降低加工农业原料的成本。

A transformative approach for the development of novel bio-fuels will be developed that will constitute a departure from current technological practice that focuses on the production of pure fuels from agricultural sources (e.g. ethanol). Production and utilization of butanol will be used in order to establish this new paradigm. In particular, it has been shown that during the production of bio-butanol, which has the potential of combining production from renewable sources with almost-gasoline-level energy density, mixtures of butanol, ethanol, and acetone are produced, usually referred to as baelene. These mixtures can clearly be used themselves as fuels, without the need to resort to pure bio-butanol. In fact, the underlying biological processes can be controlled in order to produce the butanol/acetone/ethanol proportion that is optimal for the energy conversion process in the engine chamber. The main objective of the research is to introduce a methodology that will control bio-fuel production processes through knowledge of the properties of the fuel mixture that relate to its atomization and combustion. To this extent a characterization of baelene sprays will be performed as a function of its composition utilizing a novel Planar Droplet Sizing technique that will be based on the high acetone content of the fuels under consideration. Also, novel atomization technologies will be developed that will be based on the increased electric conductivity of the bio-butanol containing mixtures, which paves the way for electrostatic manipulation of atomization and combustion. Additionally, ignition delay and turbulent flame propagation will be measured in an accurately controlled combustion chamber for a wide range of fuel compositions. The approach will be both experimental with the use of advanced, mostly laser-based diagnostics and computational with emphasis on modeling fuel properties and sprays and providing an extensive data base of high-quality data that will guide ?upstream? fuel production.The research will establish an alternative to the currently dominant mentality in bio-fuel production which involves the production of well-defined chemicals (bio-ethanol, methyl-esters) that are required to operate in engines that have been designed for drastically different fuels. Instead, a methodology will be developed that will take intermediate products of the biological processes, utilize them as fuels, optimize their composition for atomization and combustion performance, and then guide the biological process towards the production of optimized intermediates without the need to resort to pure chemicals. In this manner, clean and efficient combustion of renewable fuels will be achieved with a reduced cost of processing the raw agricultural material.