The heart pumps blood to the human body. Artificial hearts are implanted in patients suffering from severe heart diseases. For the artificial heart system, we need to consider body fluids such as: Blood, intracellular fluids, extra cellular fluids, intravenous fluids and artificial (synthetic) blood. The use of anticoagulants (Heparin or Coumarin) is necessary in the implantation of an artificial organ. These act as blood thinners and prevent thromboembolism. Cardiovascular biomaterials are used to develop artificial heart valves, mechanical heart valves, pacemakers, vascular grafts, oxygenerators and cardiac assist systems (medical devices) like total artificial hearts, intra-aortic balloon pumps etc. Some of the biomaterials used in medicine are metals, polymers ceramics and hydrogels.
دانلود مقاله مروری بر فناوری روتور موجی و کاربردهای آن A Review of Wave Rotor Technology and Its Applications
The objective of this paper is to provide a succinct review of past and current research in
developing wave rotor technology. This technology has shown unique capabilities to
enhance the performance and operating characteristics of a variety of engines and machinery
utilizing thermodynamic cycles. Although there have been a variety of applications
in the past, this technology is not yet widely used and is barely known to engineers.
Here, an attempt is made to summarize both the previously reported work in the literature
and ongoing efforts around the world. The paper covers a wide range of wave rotor
applications including the early attempts to use wave rotors, its successful commercialization
as superchargers for car engines, research on gas turbine topping, and other
developments. The review also pays close attention to more recent efforts: utilization of
such devices in pressure-gain combustors, ultra-micro gas turbines, and water refrigeration
systems, highlighting possible further efforts on this topic. Observations and lessons
learnt from experimental studies, numerical simulations, analytical approaches, and
other design and analysis tools are presented. DOI: 10.1115/1.2204628