转速对制冷波转子射流损失影响定量分析  

Quantitative analysis of refrigeration wave rotor injection loss affected by rotational speed

作　　者：付中猛 王海涛[1] 于洋[1] 胡大鹏[1] 刘培启[1] FU Zhongmeng;WANG Haitao;YU Yang;HU Dapeng;LIU Peiqi(Frontier Science Center for Smart Materials,Ministry of Education,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学教育部智能材料化工前沿科学中心,辽宁大连116024

出　　处：《大连理工大学学报》2024年第6期589-595,共7页Journal of Dalian University of Technology

基　　金：国家重点研发计划资助项目(2018YFA0704601);国家自然科学基金资助项目(22078040);中央高校基本科研业务费专项资金资助项目(DUT24ZD204,DUT22LAB604)。

摘　　要：在制冷波转子的工程应用中,射流损失受转速的影响较大,是制约设备高效制冷的关键因素.为定量分析波转子转速对射流损失的影响规律,确定较优的设计转速,通过分析波转子通道与高压射流喷嘴之间的渐开渐闭过程,研究不同转速下射流阶段的气体掺混程度和涡流强度的变化规律.结果表明:随着转速增大,波转子通道与高压进气喷嘴之间接通时间缩短,导致在渐开过程中管内原有气体的掺混占比减小,在研究范围内,掺混占比由28.84%减小至9.31%;随着转速增大,波转子通道与高压进气喷嘴之间闭合以后的涡流强度逐渐降低,且降低趋势渐缓;波转子制冷效率随转速先增大后减小,在6000r/min附近达到效率高点,当转速超过6000r/min时,制冷效率下降明显.综合考虑波转子的设计转速在4000~7000r/min时制冷效率最佳,研究结果对制冷波转子的工程设计具有指导意义.In the engineering application of refrigeration wave rotor,the injection loss is greatly influenced by rotational speed,which is a key factor limiting the efficient refrigeration of the equipment.To quantitatively analyze the effect law of rotational speed of wave rotor on the injection loss and determine a better design rotational speed,by analyzing the gradual opening and gradual closing processes between the wave rotor channel and the high-pressure injection nozzle,the variation law of blending degree and vortex intensity in the injection phase at different rotational speeds is studied,and the conclusions show that with the increase of rotational speed,the connecting time between the wave rotor channel and the high-pressure inlet nozzle is shortened,which leads to the decrease of the blending percentage of the original gas in the tube during the gradual opening process,and the blending percentage is reduced from 28.84%to 9.31%in the study range;with the increase of rotational speed,the vortex intensity after the closure of the wave rotor channel with the high-pressure inlet nozzle gradually decreases,and the decreasing trend is slow;the refrigeration efficiency of the wave rotor first increases and then decreases with the increase of rotational speed,which reaches the high efficiency point near 6000 r/min,and the refrigeration efficiency decreases significantly when the rotational speed exceeds 6000 r/min.The refrigeration efficiency is best at 4000-7000 r/min of design rotational speed of the wave rotor by comprehensively considering the influence factors.The study results provide guidance for the engineering design of refrigeration wave rotors.

关 键 词：波转子 气体掺混 涡量 射流损失 制冷效率 

分 类 号：TK14[动力工程及工程热物理—热能工程]