Research for flow behavior and characteristic in working and intelligence fluid

在本研究中，为了实现利用磁性流体的能量转换装置，对解决存在的问题进行了新的尝试。针对目前磁流体能量转换装置存在的磁力驱动力小的主要问题，我们尝试在不损害磁流体性能的温度范围内实现二元混合沸腾，并研究了磁流体驱动力的强化换热效果。这种二元混合沸腾的原理可以应用于热能电能转换系统，并对其性能特性进行了基础性研究。然而，现有的方法主要是将磁性液体本身煮沸或将气泡注入磁性液体中，这些方法被证明是不利于长期利用的。通过…更困难的是，我们提出了一种利用磁性液体和低沸点液体的二元混合液体的能量转换装置。本研究的结果表明，在不损害磁性液体功能的温度范围内沸腾产生更强的磁驱动力。此外，我们还得到了磁性液体与低沸点液体的最佳混合速度约为正己烷体积的20%。实验证实，用所提出的方法增强的磁驱力可以实现一种被认为是新的自循环。此外，还验证了磁性液体和聚合物的混合物具有较高的导电性，这将导致在热能-电能转换系统中实现磁流体发电装置。在这一系列研究中，获得了磁流体发电系统的基本性能数据。较少

In the present study, in order to realize energy conversion devices using magnetic fluids, new attempts to solve the existing problems were carried out. As to the main problems on the energy conversion devices using magnetic fluids, that the driving force by magnetic force was small, we attempted to achieve binary-mixture boiling at a temperature region which does not damage the function of the magnetic fluids, and to investigate enhancing effects of the driving force with high performance heat transfer. This principle of the binary-mixture boiling could be applied to a heat to electrical energy conversion system with conducting fundamental study on performance characteristics.There had been attempts to improve the magnetic driving force by injecting bubbles to the magnetic fluid. However, the existing methods were mainly to boiling a magnetic fluid itself or to inject the bubbles to a magnetic fluid, where these methods prove to have a disadvantage for long-period utilization. To over … More come the difficulties, we have proposed an energy conversion device using a binary-mixture fluid of a magnetic fluid and a liquid which has lower boiling point.The results of the present study have concluded that the boiling at a temperature region which does not damage the function of the magnetic fluids produces a stronger magnetic driving force. In addition, we have obtained the results that the optimum mixing rate of a magnetic fluid and a liquid which has lower boiling point is to be approximately 20 % by volume of hexane. The experiments have confirmed that the enhanced magnetic driving force with the proposed method can achieve a self-circulation that is thought to be new. Furthermore, it has been verified that a mixture of a magnetic fluid and a polymer has higher electrical conductivity, which would lead to realize a MHD power generation device in a heat-electrical energy conversion system. Fundamental performance data MHD power generation system was obtained in this series of study. Less