采用IPSA法对水平管内流动沸腾传热特性的分析

采用英国D.B.Spalding教授提出的一种两相流计算方法－－IPSA方法，对水平管内R12的流动沸腾进行了数值模拟，并且与实验数据进行了比较。结果证明这种方法能够较好对管内两相流动沸腾的传热特性进行分析。     

柴油闪急沸腾喷雾的试验研究

通过对柴油机高压油管进行外加热源加热热，在Ｅ１５０柴油机上实现柴油的闪急沸腾喷雾，并对柴油机的性能及排放进行了试验研究。结果表明，采用闪急沸腾喷雾，柴油机油耗可降低８ｇ／ｋＷ．Ｈ，烟度下降０．４ＢＳＵ，ＮＯＸ排放略有升高，ＣＯ，ＨＣ排放均降低。     

日本流化床锅炉的现状

近年来,流化床锅炉的出现,在锅炉发展史上具有划时代的意义。本文节译介绍日本采用流化床锅炉的现状以及各制造厂商的产品特点。     

沸腾珠海——泛珠三角超级赛车节侧记

4月9日，2006年“泛珠三角超级赛车节”首场比赛在美丽的海滨城市珠海落下帷幕，这个发源并植根于珠三角赛车爱好，依托珠海国际赛车场的群众性赛事，在经过一年的发展之后，现在已经成为了所有珠三角赛车爱好自己的品牌赛事，成为了这块整个中国赛车化最发达地区所有车迷的例行“周末PARTY”。[编按]     

加热面粗糙度与材料对低温流体闪蒸现象的影响

针对贮藏容器及输送管道的安全问题,以液化氮为工质,模仿在实际中可能遇到的容器及管道裂缝而引起的容器内压力变化,利用不同材质、不同粗糙度试验棒作为加热面进行实验,对减压后的压力变动情况及沸腾样态作了一定的研究.     

Two Phase Pressure Drop Performance of Refrigerant in a Small Horizontal Smooth Tube with 2.5 mm inside Diameter

Two-phase flow pressure drop measurements were made during the phase change heat transfer process of R22 in a small horizontal smooth tube with 2.5 mm inside diameter. Conclusions can be drawn that the quality corresponding to the pressure gradient peak value of small tubes became higher than that of large tubes. The effect of quality to pressure drop becomes weak as the mass flux increases. The experiment data were compared with the predicated values of the state-of-the-art correlations from the open literature. The comparisons between the data and the predictions indicate that most of the state-of-the-art correlations fails to predict the experimental data.Chisholm model shows a relatively better predictive ability than the other empirical correlations although it has a mean deviation of 26.7%. But the predicated values of Chisholm model are lower by 50% than the experimental data when the quality becomes larger.     

发动机冷却液与工作温度过高状况的分析

发动机冷却液充足，且无漏水现象，但发动机工作温度超过90℃，直到冷却液沸腾，或运行中工作温度在90℃左右，一停车即开锅。     

A New Experimental Rig of Testing Flow Boiling Heat Transfer of Refrigerant and Lubricant Mixture

This paper proposed a new experimental rig of testing flow boiling heat transfer of refrigerant and lubricant oil mixture. The quantity of oil in the test section can be controlled and regulated conveniently and accurately by connecting separate lubricant oil circuit with test section in parallel. It was built up by retrofitting a multiple air-conditioner and installing three oil-separators in serials at the compressor outlet. And so the lubricant oil in the discharged refrigerant gas of compressor can be removed completely. The refrigerant flow rate through test section can be bypassed by the by-path circuit of indoor unit. This experimental rig has advantages such as on-line and continuous oil injection, short time of obtaining stability, flexible operation, simple control, which lead to high efficiency in the research of flow boiling heat transfer of refrigerant and lubricant oil mixture.