PYI Award: Studies of Convective Boiling in Compact Heat Exchanger Geometrics and Mixed Convection Heat Transfer

PYI 奖：紧凑型换热器几何结构中的对流沸腾和混合对流换热研究

• 批准号: 8451781
• 负责人: Van Carey
• 金额: $ 31.25万
• 依托单位: University of California-Berkeley
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1985
• 资助国家: 美国
• 起止时间: 1985-07-01 至 1991-02-28
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8451781&HistoricalAwards=false
• 关键词: PYI; Award; Studies; Convective; Boiling

The research consists of studies in two areas, the first being convective boiling and two-phase flow in compact heat exchangers. A series of experimental and analytical studies is employed to investigate the effect of flow conditions, fluid properties, and geometry on convective boiling heat transfer in channels with offset strip fins. Flow visualization studies and direct measurements of local heat transfer coefficients are planned. Convective boiling in ribbed-plate and dimpled-tube geometries is also examined. The second portion of the project consists of experimental and theoretical studies of mixed convection flows near the heated vertical walls of a rectangular enclosure in the presence of a horizontal forced flow. For different enclosure geometries, the experiments examine the interaction between the forced-flow and buoyance mechanisms, and determine their combined effects on flow and heat transfer. Numerical predictions of the flow field and heat transfer are developed concurrently and compared with the experimental results.

该研究包括两个方面的研究，第一是 紧凑型换热器中的对流沸腾和两相流。 一 采用一系列实验和分析研究， 研究流动条件、流体性质和 偏置通道内对流沸腾换热的几何学 去掉鳍片。 流动显示研究和直接测量 局部热传递系数被计划。 对流沸腾 肋板和凹坑管的几何形状也检查。 第二 该项目的一部分包括实验和理论研究 的混合对流附近的加热垂直壁的一个 在水平强制流存在下的矩形外壳。 为 不同的封闭几何形状，实验研究的相互作用 之间的强制流动和流动机制，并确定其 对流动和传热的综合影响。 的数值预测 流场和传热同时发展， 与实验结果进行了比较。