An integral heat flux sensor with high spatial and temporal resolutions

• Published in: Chinese science bulletin Vol. 59; no. 27; pp. 3484 - 3489
• Main Authors: Wu, Song, Shu, Yong-Hua, Li, Jin-Ping, Yu, Hong-Ru
• Format: Journal Article
• Language: English
• Published: Heidelberg Springer-Verlag 01.09.2014; Science China Press
• Subjects: Chemistry/Food Science; Earth Sciences; Engineering; Heat flux; Heat transfer; Humanities and Social Sciences; Integrals; Life Sciences; Mathematical analysis; Mathematical models; multidisciplinary; Physics; Science; Science (multidisciplinary); Sensors; sensors (equipment); Sharp leading edges; Wind tunnels; 传感器结构; 时间分辨率; 测量精度; 激波风洞; 热流传感器; 热通量; 重复性误差; 高空间分辨率; Electron beam co-evaporation; Constantan film; Heat flux sensor; Shock tunnel
• ISSN: 1001-6538; 1861-9541
• DOI: 10.1007/s11434-014-0464-6

To measure heat flux on the sharp leading edge and other surface with very small curvature radius in the wind tunnel, Hong-Ru Yu proposed a novel design of inte- gral type heat flux sensor. Compared with the traditional heat flux sensor, the integral type heat flux sensor improved spatial resolution up to an order of magnitude, and the size of the sensing elements has been minimized to 0.1 mm successfully, which satisfied the heat flux measurement requirements at R0.5 mm pointed cone stagnation point. A constantan film was used as the contact layer of the integral heat flux sensor, which was prepared by electron beam coevaporation method. The influence of sensor structure on the accuracy of measurement was analyzed using numerical calculation. The measurement results in shock wave wind tunnel indicated that the response frequency was about 100 kHz and the repeatability error was less than 10 %.