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New Combustion Method for Direct Extracting Kinetic Energy and Application to Gas Turbine with Extremely High Efficiency

直接提取动能的燃烧新方法及其在燃气轮机上的极高效率应用

基本信息

批准号：
09358009
负责人：
ECHIGO Ryozo
金额：
$ 16.58万
依托单位：
Shibaura Institute of Technology
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (A).
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 2000
项目状态：
已结题

项目摘要

The study is consisting of two parts, i.e. Steady State Combustion System and Transient Combustion System (and executed in Shibaura Institute of Technology and Chiba University, respectively.In the steady combustion research, the experimental works have been performed on the combustion with very high preheated air in a duct of two plane parallel plates together with the swirl flow in a circular tube. The analytical approach has been developed to take into account of the swirl flow effect into one dimensional thermodynamic model.The basic concept is based on the assumption of the constant average pressure during the process of swirl flow acceleration and also on the isothermal expansion combustion. These results are extended to the three dimensional analysis to show the validities of the foregoing assumptions.An additional analytical study has been conducted to exhibit the flow and the thermal fields in a duct of two plane parallel plates and to compared with the preceding experimental results.In the transient combustion research, the combustion mechanisms have been investigated to understand the isothermal expansion combustion in details by high speed FID through the local fuel concentration measurement. In consequence, the new findings have been revealed to create the appropriate combustible mixtures around the spark plug through controlling the gas flow and fuel injection timing. In these region, the favorable combustion can be maintained even in the expansion process with temperature decrease which may be resulted in the reduction of hea tlosses.

该研究由稳态燃烧系统和瞬态燃烧系统两部分组成（分别在芝浦工业大学和千叶大学进行。在稳态燃烧研究中，实验工作是在两个平面平行板的管道中与圆管中的旋流一起燃烧非常高的预热空气。开发了分析方法，将旋流效应考虑到一维热力学模型。其基本概念基于旋流加速过程中平均压力恒定的假设以及等温膨胀燃烧。这些结果扩展到三维分析，以证明上述假设的有效性。还进行了一项额外的分析研究，以展示两个平面平行板的管道中的流动和热场，并与之前的实验进行比较在瞬态燃烧研究中，通过高速FID通过局部燃料浓度测量来研究燃烧机理，以详细了解等温膨胀燃烧。因此，新的发现表明，通过控制气流和燃油喷射正时，可以在火花塞周围产生适当的可燃混合物。在这些区域，即使在膨胀过程中可能导致温度降低，也能保持良好的燃烧。减少热损失。