| Unsteady flow in a typical class technology engineering applications is pulsating flow. As an important means of generating pulsating flow, pulsating flow generation means have not been extensively studied. The presence of conventional pulsatile flow generation means a lot of shortcomings, most do not have the amplitude and frequency can be varied, but generally do not have multiple sex pulsating flow can be additive and asymmetry. As awareness of environmental and energy issues more and more attention, new research pulsating flow generating apparatus are more and more attention.This paper introduces the status quo spread pulsating dynamic development of technology and pulsatile flow generator and the process of research, analysis of existing bad place pulsating flow generator design can change the frequency, and a plurality of flow ports pulsating flow generating, providing reasonable pulsating flow simulation program, the frequency can be changed by a pulsating flow generator and a plurality of internal flow field simulation and analysis orifice determined pulsating flow generator of the orifice diameter of 4mm.Pulsating flow generator for multiple physical processing, to build research pulsating flow characteristics bench. Experimentally test pressure measurement frequency inverter is discussed multiple pulsatile flow generator, amplitude characteristics, and further optimize the structure. Multiple frequency pulsating flow generator is connected with the improved microbubble generator, erected bench research and development, and on a different frequency, the bubble size measurements under different inlet flow. Experimental results show that, when the ripple frequency is around 80Hz, inlet flow rate of 50 times-volumes/min, microbubble generator generates bubble size is preferable. And analysis features multi-frequency pulsating flow generator, pulsating flow generator proposed direction for academic research and engineering applications. |
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