【摘要】 涡流板是单个涡流管的集成化,结构比较复杂,将它看作一个开口系统来研究.依据热力学第一、第二定律,建立适合涡流板系统分析的热力学模型.结合实验对集成涡流板系统进行分析,得到分离孔板尺寸、热端管长度、喷嘴结构以及入口压力、冷流比等因素对涡流板能量分离效果和效率的影响.研究结果表明:入口压力在0.45 MPa、冷流比在0.7~0.8、冷端孔板内径与涡流室内径之比在0.5处效率最大;热端管长度越长效率越大;渐缩型喷嘴的系统效率比平行喷嘴大.更多还原

【Abstract】 An integrated vortex board is made up of many vortex chambers,an integration of many individual vortex tubes.So its structure is very complicated.Usually,it is considered as an open system.According to the first and second laws of thermodynamics,thermodynamic equations for exergy analysis of integrated vortex board were established.The exergy analysis was conducted on integrated vortex board in combination of experiments,and the effects of the size of separated orifice plate,the length of hot tube,the nozzle structure,the inlet pressure and the cold flow ratio on energy separation and exergy efficiency of vortex board were obtained.The research outcomes showed that,the maximal exergy efficiency of a vortex board occurs when the inlet pressure is 0.45MPa,cold flow ratio is 0.7～0.8 and the ratio of the diameter of cold air orifice to vortex chamber’s diameter is 0.5.The longer the length of the hot tube,the higher the exergy efficiency.Moreover,the exergy efficiency of the shrink nozzle is bigger than that of the parallel nozzle.更多还原