Research for flow behavior and characteristic in working and intelligence fluid

本研究针对目前存在的问题进行了新的尝试，以期实现磁流体能量转换器件。针对磁性流体能量转换装置中磁力驱动力小的主要问题，我们尝试在不损害磁性流体功能的温度范围内实现二元混合物沸腾，并研究驱动力的强化效果和高性能传热。这种二元混合物沸腾的原理可以应用于热能-电能转换系统，并进行性能特性的基础研究。已经尝试通过向磁性流体中注入气泡来提高磁驱动力。然而，现有的方法主要是使磁性流体本身沸腾或将气泡注入磁性流体，其中这些方法被证明对于长期使用具有缺点。超过 ...更多信息 针对这一困难，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的能量转换装置，研究结果表明，在不损害磁性流体功能的温度范围内沸腾，产生更强的磁驱动力。此外，我们还得到了这样的结果，即磁性流体和具有较低沸点的液体的最佳混合比率为约20体积%的己烷。实验证实，所提出的方法增强磁驱动力可以实现自循环，这被认为是新的。此外，已经证实磁性流体和聚合物的混合物具有较高的导电性，这将导致在热-电能转换系统中实现MHD发电装置。通过这一系列的研究，获得了磁流体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