【摘要】 针对制冷剂在毛细管中闪蒸流动过程出现的热力学不平衡现象 ,基于毛细管内的“综合成核”理论 ,建立了气泡密度模型和气泡成长模型以及闪蒸流动数学模型 .计算出反映毛细管内制冷剂闪蒸流动过程特性的重要参数———气化欠压 ,并对计算结果进行了理论分析 .结果表明 :随着质量流量的增加和入口温度的降低 ,气化欠压增大 .更多还原

【Abstract】 Aiming at the non-equilibrium phenomenon existing in flashing flow of refrigerant in a capillary, bubble number density model,bubble growing model and flashing flow model are established based on the "combined nucleation" theory. Underpressure,an important parameter reflecting characteristic of flasing flow of refrigerant in capillary,was calculated,and the results were analyzed theoretically. The results show that underpressure increases with the increase of the mass flow rate of refrigerant and also increases with the decrease of inlet temperature.更多还原