The use of a mass transfer technique to infer heat transfer coefficients on film cooled turbine components
The use of a mass transfer technique to infer heat transfer coefficients on film cooled turbine components
复制标题
使用传质技术推断薄膜冷却涡轮机部件的传热系数
DOI：
10.1088/0957-0233/11/7/309
复制
发表时间：
2000
影响因子：
2.4
通讯作者：
N. Hay
中科院分区：
文献类型：
--
作者：
D. Lampard;N. Hay
溶胀聚合物技术是一种在稳态条件下测量传质系数的方法。传热数据可以通过类比来推断，就像更熟悉的萘升华技术一样。溶胀聚合物技术具有两个显著的优点。首先，它可以与干涉测量方法一起使用，以给出工作表面上传递系数分布的全景图。其次，传质过程是可逆的，允许重复使用工作表面。测量工作表面上的聚合物涂层的厚度的变化，最初用酯溶胀，使用全息干涉法产生描绘在表面上的相等传递系数的轨迹的条纹图案。本文介绍了该方法的基础，其优点，局限性和未来的潜力。同时测量的有效性和传热系数的技术的扩展进行了说明，并概述了其进一步扩展与曲面使用。
The swollen polymer technique is a method for measuring mass transfer coefficients under steady-state conditions. Heat transfer data can then be inferred by analogy, as with the more familiar naphthalene sublimation technique. The swollen polymer technique has two significant advantages. Firstly, it can be used with interferometric measuring methods to give a panoramic view of the distribution of the transfer coefficient over the working surface. Secondly, the mass transfer process is reversible, allowing repeated use of the working surface. Changes in thickness of a polymer coating on the working surface, initially swollen with an ester, are measured, using holographic interferometry to yield a fringe pattern depicting loci of equal transfer coefficient over the surface. The paper describes the basis of the method, its advantages, limitations and future potential. Extension of the technique for the simultaneous measurement of effectiveness and heat transfer coefficient is described and its further extension for use with curved surfaces is outlined.