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R134a卧式螺旋管内流动沸腾CHF的流体模化研究

Study on CHF Fluid to Fluid Modeling of R134a in Horizontal Helically-Coiled Tubes

中文摘要英文摘要

对低质量流速下R134a在卧式螺旋管内流动沸腾临界热流密度(Critical Heat Flux, CHF)进行了实验研究,并对螺旋管内流动沸腾的CHF进行了流体模化研究。在压力0.4~1.05MPa、质量流速55~230kg*m-2*s-1、入口热平衡干度-0.18~0.43的条件下,得到了卧式螺旋管内R134a流动沸腾CHF的实验数据,并与相同入口条件下水流动沸腾CHF关联式的计算数据进行了比较。模化结果表明,在上述工况范围内,Ahmad模型、Merillo模型和Katto模型的预测偏差均大于30%,不能适用于卧式螺旋管内流动沸腾CHF的模化。

his paper presents the experimental study on critical heat flux (CHF) of R134a in horizontal helically -coiled tubes. The CHF fluid to fluid modeling of CHF in horizontal helically-coiled tubes using R134a as the modeling fluid was discussed. Under conditions of 0.4~1.05MPa, 55~230kg*m-2*s-1 and -0.18~0.43 of the critical quality. Compared with CHF data between water and R134a, it was discovered that the compensation distortion model, Merilo model and Katto model were not suitable for CHF modeling in horizontal helically-coiled tubes, with their error deviations beyond 30%. It was concluded that the centrifugal and buoyancy forces produced during the fluid flowing process in horizontal helically-coiled tubes had complex influence on the CHF fluid to fluid modeling which deserves further study.

邵莉、陈常念、王美霞、韩吉田

制冷工程

R134a螺旋管临界热流密度流体模化

R134ahelically-coiled tubecritical heat fluxfluid to fluid modeling

邵莉,陈常念,王美霞,韩吉田.R134a卧式螺旋管内流动沸腾CHF的流体模化研究[EB/OL].(2012-02-08)[2025-08-18].http://www.paper.edu.cn/releasepaper/content/201202-120.点此复制

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