【摘要】 为了研究波转子在自复叠制冷中的应用,对双蒸发器波转子自复叠制冷循环进行热力学分析,并使用数值模拟的方法对制冷循环中波转子的增压升温性能进行研究,调整制冷循环输入参数和波转子结构,实现波转子增压性能与制冷循环要求匹配,得到波转子端口尺寸及相对位置,可作为波转子结构设计的条件。在高低压两侧压比为2的条件下,研究R134a/R23混合制冷剂混合比例对波转子性能影响结果显示,随着R134a所占比例降低,激波后压力略有降低;压力波传播速度变快,波转子端口宽度变窄(R134a摩尔分数由1降至0时高压端口宽度减小22.89%)。更多还原

【Abstract】 In order to study the application of wave rotor in the auto-cascade refrigeration, the thermodynamic analysis of the auto-cascaded refrigeration cycle topped by a wave rotor with double evaporators was conducted.The boosting and heating characteristics of wave rotor were studied by numerical simulation.The input parameters of refrigeration cycle and the structure of wave rotor were adjusted to realize the matching of wave rotor supercharging performance and refrigeration cycle requirements. The size and relative position of the wave rotor ports obtained by numerical simulation could be used as the condition of wave rotor structure design. Under the condition that the pressure ratio on both sides of the high and low pressures was 2, the effects of the mixing ratio of R134 a/R23 mixed refrigerants on the performance of the wave rotor were studied. As the proportion of R134 a decreases, the pressure after the shock decreases slightly, the propagation speed of the pressure wave becomes faster, and the width of the wave rotor port becomes narrower(the width of the high-pressure port decreases 22.89% when the mole fraction of R134 a decreases from 1 to 0)更多还原