Simultaneous measurement of gas-liquid interface motion and temperature distribution on heated surface using temperature-sensitive paint

Simultaneous measurement of gas-liquid interface motion and temperature distribution on heated surface using temperature-sensitive paint
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使用感温涂料同时测量气液界面运动和受热表面温度分布

DOI:
10.1016/j.ijheatmasstransfer.2020.119567
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发表时间:
2020
影响因子:
5.2
通讯作者:
Niimi Tomohide
Niimi Tomohide
中科院分区:
工程技术2区
文献类型:
--
作者:
Matsuda Yu;Kawanami Osamu;Orimo Riki;Uete Keigo;Watanabe Atsufumi;Egami Yasuhiro;Yamaguchi Hiroki;Niimi Tomohide

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发展了一种利用温敏涂料(TSP)同时测量微间隙通道内两相流受热面温度分布和气液界面运动的技术。由于TSP层是光学透明的,所提出的方法使我们能够同时测量的温度分布和气液界面的运动通过TSP层使用内部立体像设备。由于气相和液相的折射率不同,即使在气相和液相温度相同的情况下,TSP在气相和液相中的发光强度也不同。在此基础上,提出了一种气相温度分布的修正方法。为了验证所提出的方法,在液体单相流中进行了温度分布测量。由实测温度计算的努塞尔数与Sieder-Tate方程吻合较好。然后,我们测量了几种加热温度条件下的沸腾流动的温度分布。成功地测量了气泡生长和合并时的温度分布。TSP是研究两相流温度分布的有效方法。
We developed a simultaneous measurement technique for temperature distribution on a heated surface and gas-liquid interface motion of two-phase flows in microgap channel using temperature-sensitive paint (TSP). Since the TSP layer is optically transparent, the proposed method enables us to simultaneously measure the temperature distribution and the motion of gas-liquid interface through the TSP layer using an in-house stereoscope-like device. Since the refractive index of gas-phase differs from that of liquid-phase, the luminescent intensity of TSP in gas-phase varies from that in liquid-phase even though the temperatures are same in both phases. Then, we proposed a correction method for temperature distribution in gas-phase. To validate the proposed method, the temperature distribution measurements were conducted in liquid single-phase flow. The Nusselt numbers calculated from the measured temperatures were in good agreement with the Sieder-Tate equation. Then, we measured the temperature distributions for the boiling flows under several heated temperature conditions. The temperature distributions at growing bubble and bubble coalescence were successfully measured. TSP is useful method for investigating the temperature distribution in two-phase flows.
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