Research for flow behavior and characteristic in working and intelligence fluid

在本研究中，为了实现磁流体能量转换装置，对存在的问题进行了新的尝试。针对磁流体能量转换装置存在的磁力驱动力小的主要问题，我们尝试在不破坏磁流体功能的温度范围内实现二元混合物沸腾，并通过高性能的传热来研究驱动力的增强效果。二元混合物沸腾原理可应用于热电转换系统，对其性能特性进行基础性研究。曾有人试图通过向磁性流体中注入气泡来提高磁性驱动力。然而，现有的方法主要是将磁性流体本身煮沸或将气泡注入磁性流体中，这些方法在长期使用方面存在缺点。为了克服这些困难，我们提出了一种利用磁性流体和低沸点液体的二元混合流体进行能量转换的装置。本研究的结果表明，在不破坏磁流体功能的温度范围内沸腾会产生更强的磁驱动力。此外，我们还得到了磁流体与低沸点液体的最佳混合率为己烷体积的20%左右的结果。实验证明，采用该方法增强磁驱动力可以实现自循环，这是一种新的自循环方法。此外，还验证了磁性流体和聚合物的混合物具有更高的导电性，这将导致在热电转换系统中实现MHD发电装置。在这一系列的研究中，获得了MHD发电系统的基本性能数据。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