微激励振荡射流集中耗散气波制冷机制及强化

项目名称： 微激励振荡射流集中耗散气波制冷机制及强化

项目编号： No.51276026

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 能源与动力工程

项目作者： 邹久朋

作者单位： 大连理工大学

项目金额： 80万元

中文摘要： 针对目前静止式气波制冷机制的缺陷，提出以微射流高效激励、低损失地产生可调控的附壁振荡射流，再进双开口短气波管中高效传输分离能量，最后在共容腔中集中耗散的新型高效气波制冷机制。研究伴随两项重大变革所呈现的理论新问题：高速可压缩射流非定常流动的边界层分离控制；微射流激励射流振荡的高效机理、几何优化机制；双开口短气波管内能量的动态分离与制冷，末端开口边界条件的约束机制等。该制冷机制研究能避免原机制射流自激励振荡所产生的能量损失，和消除反射激波提高效率，及克服长气波管的振动与可靠性缺陷。 研究微射流的高效激励、诱导机制和主射流的响应性能，振荡控制与强化。研究双开口短气波管在末端共容贯通的边界条件下，管内波系的运动特征和能量传输转换关系，管内温差、压力振幅与过程效率之关系及能动控制措施；研究混合能损与反射激波的消除、流道参数优化等。以期创新高效无动件气波制冷装置，发展高速射流控制与气波应用理论。

中文关键词： 压力能；附壁振荡；激励流；气波制冷；能效

英文摘要： To overcome the drawbacks of static gas wave refrigerator, a novel refrigeration mechanism with micro incentive jet oscillation and centralized dissipation in dual-opened short pulse tubes is developed. Several radical innovation theories involved in the study must be studied thoroughly: control of unsteady high speed jetting boundary layer, mechanism of micro incentive jet oscillation and its geometry optimization, dynamic thermal separation in dual-opened short pulse tubes, and constraint mechanisms of end outlet boundary condition. The novel refrigeration mechanism can eliminate reflective shockwaves and can overcome the shortcomings of energy loss on former jet oscillation and tube vibrations. The research also includes: high efficient inspiration and induction mechanisms of micro jet, corresponding properties and oscillation control or intensification of major jet; the relationship between waves motion characteristics and energy transfer, the relationship between temperature differences, pressure amplitude and process efficiency under condition of the same chamber for short pulse tubes; study on dynamic control measures, energy losses of mixing, elimination of reflective shocks, and structural optimization. Based on the above research, a novel high efficiency gas wave refrigeration equipment without movemen

英文关键词： Pressure energy；Wall-attached oscillation；Excitation streams；Gas wave refrigeration；Energy efficiency